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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1806.00601 | Mariusz P. Dabrowski | Mariusz P. Dabrowski and Konrad Marosek | Non-exotic conformal structure of weak exotic singularities | 12 pages, 6 figures, matches published GRG version | Gen. Rel. Grav. 50, 160 (2018) | 10.1007/s10714-018-2482-1 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the conformal structure of exotic (non-big-bang) singularity
universes using the hybrid big-bang/exotic singularity/big-bang and
big-rip/exotic singularity/big-rip models by investigating their appropriate
Penrose diagrams. We show that the diagrams have the standard structure for the
big-bang and big-rip an... | [
{
"created": "Sat, 2 Jun 2018 08:00:48 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Oct 2019 13:35:00 GMT",
"version": "v2"
}
] | 2019-11-06 | [
[
"Dabrowski",
"Mariusz P.",
""
],
[
"Marosek",
"Konrad",
""
]
] | We study the conformal structure of exotic (non-big-bang) singularity universes using the hybrid big-bang/exotic singularity/big-bang and big-rip/exotic singularity/big-rip models by investigating their appropriate Penrose diagrams. We show that the diagrams have the standard structure for the big-bang and big-rip and ... |
1501.01205 | Claus Gerhardt | Claus Gerhardt | A unified field theory I: The quantization of gravity | This paper has been published in ATMP 22 (2018) under the title "The
quantization of gravity". The title of the arXiv version, however, will
remain unchanged since it had been referred to under the original title in a
number of other papers | Adv. Their. Math. Phys. 22, 709--757 (2018) | 10.4310/ATMP.2018.v22.n3.a4 | null | gr-qc hep-th math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a former paper we proposed a model for the quantization of gravity by
working in a bundle $E$ where we realized the Hamilton constraint as the
Wheeler-DeWitt equation. However, the corresponding operator only acts in the
fibers and not in the base space. Therefore, we now discard the Wheeler-DeWitt
equation and ex... | [
{
"created": "Mon, 5 Jan 2015 19:55:09 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Sep 2015 12:44:49 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jan 2016 20:02:34 GMT",
"version": "v3"
},
{
"created": "Thu, 5 Apr 2018 19:20:23 GMT",
"version": "v4"
},
{
"crea... | 2018-10-23 | [
[
"Gerhardt",
"Claus",
""
]
] | In a former paper we proposed a model for the quantization of gravity by working in a bundle $E$ where we realized the Hamilton constraint as the Wheeler-DeWitt equation. However, the corresponding operator only acts in the fibers and not in the base space. Therefore, we now discard the Wheeler-DeWitt equation and expr... |
1603.09670 | Diego S\'aez-G\'omez | Diego Saez-Gomez, C. Sofia Carvalho, Francisco S. N. Lobo and Ismael
Tereno | Constraining $f(T, \mathcal{T})$ gravity models using type Ia supernovae | 10 pages, 3 figures. Version published in PRD | Phys. Rev. D 94, 024034 (2016) | 10.1103/PhysRevD.94.024034 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an analysis of an $f(T, \mathcal{T})$ extension of the
Teleparallel Equivalent of General Relativity, where $T$ denotes the torsion
and $\mathcal{T}$ the trace of the energy-momentum tensor. This extension
includes non--minimal couplings between torsion and matter. In particular, we
construct two specific ... | [
{
"created": "Tue, 29 Mar 2016 10:51:27 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jul 2016 15:39:08 GMT",
"version": "v2"
}
] | 2016-07-27 | [
[
"Saez-Gomez",
"Diego",
""
],
[
"Carvalho",
"C. Sofia",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Tereno",
"Ismael",
""
]
] | We present an analysis of an $f(T, \mathcal{T})$ extension of the Teleparallel Equivalent of General Relativity, where $T$ denotes the torsion and $\mathcal{T}$ the trace of the energy-momentum tensor. This extension includes non--minimal couplings between torsion and matter. In particular, we construct two specific mo... |
2301.10795 | Dishant Pandya M | Rinkal Patel and B. S. Ratanpal, D. M. Pandya | New charged anisotropic solution on paraboloidal spacetime | 29 Pages, 12 Figures, 3 Tables | null | 10.1007/s10509-023-04213-2 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | New exact solutions of Einstein's field equations for charged stellar models
by assuming linear equation of state $ P_r=A(\rho-\rho_{a}) $, where $ P_r $ is
the radial pressure and $ \rho_{a} $ is the surface density. By assuming $
e^{\lambda} = 1+\frac{r^2}{R^2} $ for metric potential. The physical
acceptability con... | [
{
"created": "Wed, 25 Jan 2023 19:23:35 GMT",
"version": "v1"
}
] | 2023-07-26 | [
[
"Patel",
"Rinkal",
""
],
[
"Ratanpal",
"B. S.",
""
],
[
"Pandya",
"D. M.",
""
]
] | New exact solutions of Einstein's field equations for charged stellar models by assuming linear equation of state $ P_r=A(\rho-\rho_{a}) $, where $ P_r $ is the radial pressure and $ \rho_{a} $ is the surface density. By assuming $ e^{\lambda} = 1+\frac{r^2}{R^2} $ for metric potential. The physical acceptability condi... |
2205.04777 | Minyong Guo | Hu Zhu and Minyong Guo | Polarized image of synchrotron radiations of hotspots in
Schwarzschilld-Melvin black hole spacetime | 20 pages, 10 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revisit the innermost stable circular orbits (ISCOs) of charged particles
and study the polarized images of synchrotron radiations emitted from such
orbiting hotspots on the equatorial plane in Schwarzchild-Melvin black hole
spacetime. We obtain a constraint on the magnetic field to retain ISCOs for
charged partic... | [
{
"created": "Tue, 10 May 2022 09:56:31 GMT",
"version": "v1"
}
] | 2022-05-11 | [
[
"Zhu",
"Hu",
""
],
[
"Guo",
"Minyong",
""
]
] | We revisit the innermost stable circular orbits (ISCOs) of charged particles and study the polarized images of synchrotron radiations emitted from such orbiting hotspots on the equatorial plane in Schwarzchild-Melvin black hole spacetime. We obtain a constraint on the magnetic field to retain ISCOs for charged particle... |
1406.7636 | Farhad Darabi | F. Darabi, Y. Heydarzade and F. Hajkarim | Stability of Einstein Static Universe over Lyra Geometry | 11 pages | Can. J. Phys. 93, 1566 (2015) | 10.1139/cjp-2015-0312 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence and stability conditions of Einstein static universe against
homogeneous scalar perturbations in the context of Lyra geometry is
investigated. The stability condition is obtained in terms of the constant
equation of state parameter $\omega=p/\rho$ depending on energy density
$\rho_0$ and scale factor $a... | [
{
"created": "Mon, 30 Jun 2014 08:52:36 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Dec 2015 14:40:33 GMT",
"version": "v2"
}
] | 2023-07-19 | [
[
"Darabi",
"F.",
""
],
[
"Heydarzade",
"Y.",
""
],
[
"Hajkarim",
"F.",
""
]
] | The existence and stability conditions of Einstein static universe against homogeneous scalar perturbations in the context of Lyra geometry is investigated. The stability condition is obtained in terms of the constant equation of state parameter $\omega=p/\rho$ depending on energy density $\rho_0$ and scale factor $a_0... |
2401.07512 | Davide Batic | Davide Batic and Marek Nowakowski | Gravitational Collapse via Wheeler-DeWitt Equation | 14 pages, 2 figures | Ann. Phys. 2024, 461, 169579 | 10.1016/j.aop.2023.169579 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We analyze the Wheeler-DeWitt (WDW) equation in the context of a
gravitational collapse. The physics of an expanding/collapsing universe and
many details of a collapsing star can classically be described by the
Roberston-Walker metric in which the WDW equation takes the form of a
times-less Schr\"odinger equation. We... | [
{
"created": "Mon, 15 Jan 2024 07:27:35 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Batic",
"Davide",
""
],
[
"Nowakowski",
"Marek",
""
]
] | We analyze the Wheeler-DeWitt (WDW) equation in the context of a gravitational collapse. The physics of an expanding/collapsing universe and many details of a collapsing star can classically be described by the Roberston-Walker metric in which the WDW equation takes the form of a times-less Schr\"odinger equation. We s... |
2104.07533 | Alessandro Nagar | Gunnar Riemenschneider, Piero Rettegno, Matteo Breschi, Angelica
Albertini, Rossella Gamba, Sebastiano Bernuzzi and Alessandro Nagar | TEOBResumS: assessment of consistent next-to-quasicircular corrections
and post-adiabatic approximation in multipolar binary black holes waveforms | 13 pages, 11 figures, submitted to Phys. Rev. D | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The use of effective-one-body (EOB) waveforms for black hole binaries
analysis in gravitational-wave astronomy requires faithful models and fast
generation times. A key aspect to achieve faithfulness is the inclusion of
numerical-relativity (NR) informed next-to-quasicircular corrections(NQC),
dependent on the radial... | [
{
"created": "Thu, 15 Apr 2021 15:38:24 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Apr 2021 05:12:19 GMT",
"version": "v2"
}
] | 2021-04-20 | [
[
"Riemenschneider",
"Gunnar",
""
],
[
"Rettegno",
"Piero",
""
],
[
"Breschi",
"Matteo",
""
],
[
"Albertini",
"Angelica",
""
],
[
"Gamba",
"Rossella",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Nagar",
"Alessandr... | The use of effective-one-body (EOB) waveforms for black hole binaries analysis in gravitational-wave astronomy requires faithful models and fast generation times. A key aspect to achieve faithfulness is the inclusion of numerical-relativity (NR) informed next-to-quasicircular corrections(NQC), dependent on the radial m... |
2112.07455 | Yunqi Liu | Cheng-Yong Zhang, Qian Chen, Yunqi Liu, Wen-Kun Luo, Yu Tian, Bin Wang | Critical phenomena in dynamical scalarization of charged black hole | Phys. Rev. Lett. 128, 161105 | null | 10.1103/PhysRevLett.128.161105 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | We report a new black hole scalarization mechanism and disclose novel
dynamical critical phenomena in the process of the nonlinear accretion of the
scalar field into black holes. The accretion process can transform a seed black
hole into a final scalarized or bald black hole, depending on the initial
parameter of the... | [
{
"created": "Tue, 14 Dec 2021 15:12:46 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jan 2022 01:48:54 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Apr 2022 15:37:00 GMT",
"version": "v3"
},
{
"created": "Fri, 22 Apr 2022 14:30:59 GMT",
"version": "v4"
}
] | 2022-04-25 | [
[
"Zhang",
"Cheng-Yong",
""
],
[
"Chen",
"Qian",
""
],
[
"Liu",
"Yunqi",
""
],
[
"Luo",
"Wen-Kun",
""
],
[
"Tian",
"Yu",
""
],
[
"Wang",
"Bin",
""
]
] | We report a new black hole scalarization mechanism and disclose novel dynamical critical phenomena in the process of the nonlinear accretion of the scalar field into black holes. The accretion process can transform a seed black hole into a final scalarized or bald black hole, depending on the initial parameter of the s... |
2210.07971 | Laxmipriya Pati Miss | Laxmipriya Pati, Daniel Blixt and Maria-Jose Guzman | Hamilton's equations in the covariant teleparallel equivalent of general
relativity | 22 Pages, No figures | Physical Review D 107, 044071 (2023) | 10.1103/PhysRevD.107.044071 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present Hamilton's equations for the teleparallel equivalent of general
relativity (TEGR), which is a reformulation of general relativity based on a
curvatureless, metric compatible, and torsionful connection. For this, we
consider the Hamiltonian for TEGR obtained through the vector, antisymmetric,
symmetric and ... | [
{
"created": "Fri, 14 Oct 2022 17:10:07 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Mar 2023 08:44:31 GMT",
"version": "v2"
}
] | 2023-03-08 | [
[
"Pati",
"Laxmipriya",
""
],
[
"Blixt",
"Daniel",
""
],
[
"Guzman",
"Maria-Jose",
""
]
] | We present Hamilton's equations for the teleparallel equivalent of general relativity (TEGR), which is a reformulation of general relativity based on a curvatureless, metric compatible, and torsionful connection. For this, we consider the Hamiltonian for TEGR obtained through the vector, antisymmetric, symmetric and tr... |
2403.01436 | Shoichiro Miyashita | Shoichiro Miyashita | Thermodynamics of the 3-dimensional Einstein-Maxwell system | 18pages, 9 figures; v3: typos corrected; v2: the introduction
expanded, references and footnotes added, the implication of the result for
the thermodynamics of 3-dimensional gravity added to the abstract and the
conclusion | JHEP 06 (2024) 134 | 10.1007/JHEP06(2024)134 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Recently, I studied the thermodynamical properties of the Einstein-Maxwell
system with a box boundary in 4-dimensions [1](JHEP 04 (2024) 083). In this
paper, I investigate those in 3-dimensions using the zero-loop saddle-point
approximation and focusing only on a simple topology sector as usual. Similar
to the 4-dime... | [
{
"created": "Sun, 3 Mar 2024 08:14:51 GMT",
"version": "v1"
},
{
"created": "Fri, 10 May 2024 02:57:03 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Jun 2024 15:36:26 GMT",
"version": "v3"
}
] | 2024-06-21 | [
[
"Miyashita",
"Shoichiro",
""
]
] | Recently, I studied the thermodynamical properties of the Einstein-Maxwell system with a box boundary in 4-dimensions [1](JHEP 04 (2024) 083). In this paper, I investigate those in 3-dimensions using the zero-loop saddle-point approximation and focusing only on a simple topology sector as usual. Similar to the 4-dimens... |
1508.06859 | Adam Solomon | Adam R. Solomon | Cosmology Beyond Einstein | PhD thesis, University of Cambridge, April 2015. 301 pages, 20
figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The accelerating expansion of the Universe poses a major challenge to our
understanding of fundamental physics. One promising avenue is to modify general
relativity and obtain a new description of the gravitational force. Because
gravitation dominates the other forces mostly on large scales, cosmological
probes provi... | [
{
"created": "Tue, 25 Aug 2015 20:06:31 GMT",
"version": "v1"
}
] | 2015-08-28 | [
[
"Solomon",
"Adam R.",
""
]
] | The accelerating expansion of the Universe poses a major challenge to our understanding of fundamental physics. One promising avenue is to modify general relativity and obtain a new description of the gravitational force. Because gravitation dominates the other forces mostly on large scales, cosmological probes provide... |
gr-qc/0306018 | Gilles Esposito-Farese | Gilles Esposito-Farese | Scalar-tensor theories and cosmology | 8 pages, 2 figures, uses "moriond.sty", contribution to the XXXVIIIth
Rencontres de Moriond on Gravitational Waves and Experimental Gravity, Les
Arcs (France), March 23-29 2003 | Proceedings The Gioi Publishers (Vietnam, 2003) p. 427 | null | null | gr-qc astro-ph | null | Scalar-tensor theories are the best motivated alternatives to general
relativity and provide a mathematically consistent framework to test the
various observable predictions. They can involve three functions of the scalar
field: (i) a potential (as in "quintessence" models), (ii) a matter-scalar
coupling function (as... | [
{
"created": "Wed, 4 Jun 2003 14:04:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Esposito-Farese",
"Gilles",
""
]
] | Scalar-tensor theories are the best motivated alternatives to general relativity and provide a mathematically consistent framework to test the various observable predictions. They can involve three functions of the scalar field: (i) a potential (as in "quintessence" models), (ii) a matter-scalar coupling function (as i... |
1803.03246 | Clement Delcamp | Clement Delcamp, Laurent Freidel, Florian Girelli | Dual loop quantizations of 3d gravity | 33 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The loop quantization of 3d gravity consists in defining the Hilbert space of
states satisfying the Gau{\ss} constraint and the flatness constraint. The
Gau{\ss} constraint is enforced at the kinematical level by introducing spin
networks which form a basis for the Hilbert space of gauge invariant
functionals. The fl... | [
{
"created": "Thu, 8 Mar 2018 18:40:41 GMT",
"version": "v1"
}
] | 2018-03-09 | [
[
"Delcamp",
"Clement",
""
],
[
"Freidel",
"Laurent",
""
],
[
"Girelli",
"Florian",
""
]
] | The loop quantization of 3d gravity consists in defining the Hilbert space of states satisfying the Gau{\ss} constraint and the flatness constraint. The Gau{\ss} constraint is enforced at the kinematical level by introducing spin networks which form a basis for the Hilbert space of gauge invariant functionals. The flat... |
1009.6064 | Azad Akhter Siddiqui Professor | Azad A. Siddiqui | Foliation of the Kottler-Schwarzschild-De Sitter Spacetime by Flat
Spacelike Hypersurfaces | 12 pages, 4 figures | Gen.Rel.Grav.43:1189-1196,2011 | 10.1007/s10714-010-1064-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There exist Kruskal like coordinates for the Reissner-Nordstrom (RN) black
hole spacetime which are regular at coordinate singularities. Non existence of
such coordinates for the extreme RN black hole spacetime has already been
shown. Also the Carter coordinates available for the extreme case are not
manifestly regul... | [
{
"created": "Thu, 30 Sep 2010 08:31:00 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2011 07:23:57 GMT",
"version": "v2"
}
] | 2011-12-01 | [
[
"Siddiqui",
"Azad A.",
""
]
] | There exist Kruskal like coordinates for the Reissner-Nordstrom (RN) black hole spacetime which are regular at coordinate singularities. Non existence of such coordinates for the extreme RN black hole spacetime has already been shown. Also the Carter coordinates available for the extreme case are not manifestly regular... |
gr-qc/0305040 | Bahram Mashhoon | Bahram Mashhoon | Nonlocality of Accelerated Systems | LaTeX file, no figures, 9 pages, to appear in: "Black Holes,
Gravitational Waves and Cosmology" (World Scientific, Singapore, 2003) | Int.J.Mod.Phys. D14 (2005) 171-179 | 10.1142/S0218271805005864 | null | gr-qc astro-ph | null | The conceptual basis for the nonlocality of accelerated systems is presented.
The nonlocal theory of accelerated observers and its consequences are briefly
described. Nonlocal field equations are developed for the case of the
electrodynamics of linearly accelerated systems.
| [
{
"created": "Sun, 11 May 2003 20:18:50 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Mashhoon",
"Bahram",
""
]
] | The conceptual basis for the nonlocality of accelerated systems is presented. The nonlocal theory of accelerated observers and its consequences are briefly described. Nonlocal field equations are developed for the case of the electrodynamics of linearly accelerated systems. |
1004.1989 | Stefan Liebscher | Stefan Liebscher, J\"org H\"arterich, Kevin Webster, Marc Georgi | Ancient Dynamics in Bianchi Models: Approach to Periodic Cycles | Minor corrections and clarifications throughout the text, according
to referee's suggestions | Commun.Math.Phys.305:59-83,2011 | 10.1007/s00220-011-1248-3 | null | gr-qc math.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider cosmological models of Bianchi type. In particular, we are
interested in the alpha-limit dynamics near the Kasner circle of equilibria for
Bianchi classes VIII and IX. They correspond to cosmological models close to
the big-bang singularity.
We prove the existence of a codimension-one family of solution... | [
{
"created": "Mon, 12 Apr 2010 15:32:05 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Apr 2010 09:15:15 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Oct 2010 16:43:47 GMT",
"version": "v3"
}
] | 2011-05-18 | [
[
"Liebscher",
"Stefan",
""
],
[
"Härterich",
"Jörg",
""
],
[
"Webster",
"Kevin",
""
],
[
"Georgi",
"Marc",
""
]
] | We consider cosmological models of Bianchi type. In particular, we are interested in the alpha-limit dynamics near the Kasner circle of equilibria for Bianchi classes VIII and IX. They correspond to cosmological models close to the big-bang singularity. We prove the existence of a codimension-one family of solutions th... |
1503.01417 | Gabriel Leon | Gabriel Leon and Daniel Sudarsky | Origin of structure: Statistical characterization of the primordial
density fluctuations and the collapse of the wave function | 24 pages, 3 figures. Minor corrections, accepted for publication in
JCAP. arXiv admin note: substantial text overlap with arXiv:1312.7590 | JCAP 06(2015)020 | 10.1088/1475-7516/2015/06/020 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The statistical properties of the primordial density perturbations has been
considered in the past decade as a powerful probe of the physical processes
taking place in the early universe. Within the inflationary paradigm, the
properties of the bispectrum are one of the keys that serves to discriminate
among competing... | [
{
"created": "Wed, 4 Mar 2015 18:59:34 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Jun 2015 22:31:17 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Leon",
"Gabriel",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | The statistical properties of the primordial density perturbations has been considered in the past decade as a powerful probe of the physical processes taking place in the early universe. Within the inflationary paradigm, the properties of the bispectrum are one of the keys that serves to discriminate among competing s... |
2208.11615 | En-Kun Li | Jun Cheng, En-Kun Li, Yi-Ming Hu, Zheng-Cheng Liang, Jian-dong Zhang,
Jianwei Mei | Detecting the stochastic gravitational wave background with the TianQin
detector | 28 pages, 8 figures | null | 10.1103/PhysRevD.106.124027 | null | gr-qc astro-ph.CO astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The detection of stochastic gravitational wave background (SGWB) is among the
leading scientific goals of the space-borne gravitational wave observatory,
which would have significant impact on astrophysics and fundamental physics. In
this work, we developed a data analysis software, \texttt{TQSGWB}, which can
extract... | [
{
"created": "Wed, 24 Aug 2022 15:36:02 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Dec 2022 15:32:12 GMT",
"version": "v2"
}
] | 2023-01-04 | [
[
"Cheng",
"Jun",
""
],
[
"Li",
"En-Kun",
""
],
[
"Hu",
"Yi-Ming",
""
],
[
"Liang",
"Zheng-Cheng",
""
],
[
"Zhang",
"Jian-dong",
""
],
[
"Mei",
"Jianwei",
""
]
] | The detection of stochastic gravitational wave background (SGWB) is among the leading scientific goals of the space-borne gravitational wave observatory, which would have significant impact on astrophysics and fundamental physics. In this work, we developed a data analysis software, \texttt{TQSGWB}, which can extract i... |
1601.01072 | Atsushi Nishizawa | Atsushi Nishizawa | Constraining the propagation speed of gravitational waves with compact
binaries at cosmological distances | 9 pages, 9 figures | Phys. Rev. D 93, 124036 (2016) | 10.1103/PhysRevD.93.124036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In testing gravity a model-independent way, one of crucial tests is measuring
the propagation speed of a gravitational wave (GW). In general relativity, a GW
propagates with the speed of light, while in the alternative theories of
gravity the propagation speed could deviate from the speed of light due to the
modifica... | [
{
"created": "Wed, 6 Jan 2016 03:43:26 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Feb 2016 03:55:05 GMT",
"version": "v2"
}
] | 2016-06-22 | [
[
"Nishizawa",
"Atsushi",
""
]
] | In testing gravity a model-independent way, one of crucial tests is measuring the propagation speed of a gravitational wave (GW). In general relativity, a GW propagates with the speed of light, while in the alternative theories of gravity the propagation speed could deviate from the speed of light due to the modificati... |
1302.2198 | K G Arun | K G Arun, Archana Pai | Tests of General Relativity and Alternative theories of gravity using
Gravitational Wave observations | Invited Review to International Journal of Modern Physics D (based on
a talk in ASTROD symposium, Bangalore) | International Journal of Modern Physics D, Vol. 22, 1341012 (2013) | 10.1142/S0218271813410125 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational Wave (GW) observations of coalescing compact binaries will be
unique probes of strong-field, dynamical aspects of relativistic gravity. We
present a short review of various schemes proposed in the literature to test
General Relativity (GR) and alternative theories of gravity using inspiral
waveforms. Br... | [
{
"created": "Sat, 9 Feb 2013 05:40:18 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Arun",
"K G",
""
],
[
"Pai",
"Archana",
""
]
] | Gravitational Wave (GW) observations of coalescing compact binaries will be unique probes of strong-field, dynamical aspects of relativistic gravity. We present a short review of various schemes proposed in the literature to test General Relativity (GR) and alternative theories of gravity using inspiral waveforms. Broa... |
1111.3535 | Thomas Cailleteau Mr | Thomas Cailleteau, Jakub Mielczarek, Aurelien Barrau and Julien Grain | Anomaly-free scalar perturbations with holonomy corrections in loop
quantum cosmology | 19 pages, 1 figure, v2, new comments and references added, minor
corrections | Class.Quantum Grav. 29 095010 2012 | 10.1088/0264-9381/29/9/095010 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Holonomy corrections to scalar perturbations are investigated in the loop
quantum cosmology framework. Due to the effective approach, modifications of
the algebra of constraints generically lead to anomalies. In order to remove
those anomalies, counter-terms are introduced. We find a way to explicitly
fulfill the con... | [
{
"created": "Tue, 15 Nov 2011 14:35:03 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Dec 2011 09:32:39 GMT",
"version": "v2"
}
] | 2012-11-01 | [
[
"Cailleteau",
"Thomas",
""
],
[
"Mielczarek",
"Jakub",
""
],
[
"Barrau",
"Aurelien",
""
],
[
"Grain",
"Julien",
""
]
] | Holonomy corrections to scalar perturbations are investigated in the loop quantum cosmology framework. Due to the effective approach, modifications of the algebra of constraints generically lead to anomalies. In order to remove those anomalies, counter-terms are introduced. We find a way to explicitly fulfill the condi... |
2309.14270 | Ivan Avramidi | Ivan G. Avramidi and Roberto Niardi | MOND via Matrix Gravity | 31 pages, minor corrections | null | null | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | MOND theory has arisen as a promising alternative to dark matter in
explaining the collection of discrepancies that constitute the so-called
missing mass problem. The MOND paradigm is briefly reviewed. It is shown that
MOND theory can be incorporated in the framework of the recently proposed
Matrix Gravity. In partic... | [
{
"created": "Mon, 25 Sep 2023 16:30:26 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Sep 2023 05:20:28 GMT",
"version": "v2"
},
{
"created": "Fri, 16 Feb 2024 16:43:02 GMT",
"version": "v3"
}
] | 2024-02-19 | [
[
"Avramidi",
"Ivan G.",
""
],
[
"Niardi",
"Roberto",
""
]
] | MOND theory has arisen as a promising alternative to dark matter in explaining the collection of discrepancies that constitute the so-called missing mass problem. The MOND paradigm is briefly reviewed. It is shown that MOND theory can be incorporated in the framework of the recently proposed Matrix Gravity. In particul... |
gr-qc/0211044 | Mauricio Bellini | Mauricio Bellini (IFM, Michoacana University) | Fresh inflation with increasing cosmological parameter | 5 pages, 5 figures (accepted in Phys. Rev. D) | Phys.Rev. D67 (2003) 027303 | 10.1103/PhysRevD.67.027303 | null | gr-qc hep-ph | null | I study a fresh inflationary model with an increasing F-cosmological
parameter. The model provides sufficiently e-folds to solve the
flatness/horizon problem and the density fluctuations agree with experimental
values. The temperature increases during fresh inflation and reach its maximum
value when inflation ends. I... | [
{
"created": "Tue, 12 Nov 2002 17:15:34 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Nov 2002 00:27:26 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Bellini",
"Mauricio",
"",
"IFM, Michoacana University"
]
] | I study a fresh inflationary model with an increasing F-cosmological parameter. The model provides sufficiently e-folds to solve the flatness/horizon problem and the density fluctuations agree with experimental values. The temperature increases during fresh inflation and reach its maximum value when inflation ends. I f... |
gr-qc/0211093 | Stoytcho Yazadjiev | Stoytcho S. Yazadjiev (Sofia University) | A class of homogeneous scalar-tensor cosmologies with a radiation fluid | 7 pages, LaTex; v2 type mistakes corrected, comments added | Mod.Phys.Lett. A18 (2003) 1967-1974 | 10.1142/S0217732303011824 | null | gr-qc | null | We present a new class of exact homogeneous cosmological solutions with a
radiation fluid for all scalar-tensor theories. The solutions belong to Bianchi
type $VI_{h}$ cosmologies. Explicit examples of nonsingular homogeneous
scalar-tensor cosmologies are also given.
| [
{
"created": "Wed, 27 Nov 2002 12:52:03 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jan 2003 07:06:06 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Yazadjiev",
"Stoytcho S.",
"",
"Sofia University"
]
] | We present a new class of exact homogeneous cosmological solutions with a radiation fluid for all scalar-tensor theories. The solutions belong to Bianchi type $VI_{h}$ cosmologies. Explicit examples of nonsingular homogeneous scalar-tensor cosmologies are also given. |
1901.09273 | Damiano Anselmi | Damiano Anselmi | Fakeons and the classicization of quantum gravity: the FLRW metric | 27 pages, 3 figures; v2: typos corrected and refs. updated, JHEP | J. High Energy Phys. 04 (2019) 61 | 10.1007/JHEP04(2019)061 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Under certain assumptions, it is possible to make sense of higher derivative
theories by quantizing the unwanted degrees of freedom as fakeons, which are
later projected away. Then the true classical limit is obtained by classicizing
the quantum theory. Since quantum field theory is formulated perturbatively,
the cla... | [
{
"created": "Sat, 26 Jan 2019 20:08:38 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Apr 2019 15:12:58 GMT",
"version": "v2"
}
] | 2019-04-10 | [
[
"Anselmi",
"Damiano",
""
]
] | Under certain assumptions, it is possible to make sense of higher derivative theories by quantizing the unwanted degrees of freedom as fakeons, which are later projected away. Then the true classical limit is obtained by classicizing the quantum theory. Since quantum field theory is formulated perturbatively, the class... |
1910.13217 | Avadhut Purohit | Avadhut V. Purohit | The status of geometry and matter in re-interpreted WdW equation | 6 pages | Phys. Sci. Forum 2023, 7(1), 37 | 10.3390/ECU2023-14097 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I have shown that the field defined by the Wheeler-DeWitt equation for
\textit{pure gravity} is neither a standard gravitational field nor the field
representing a particular universe. The theory offers a unified description of
geometry and matter, with geometry being fundamental. The quantum theory
possesses gravita... | [
{
"created": "Tue, 29 Oct 2019 11:57:03 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jul 2021 05:22:07 GMT",
"version": "v2"
},
{
"created": "Mon, 16 May 2022 12:47:14 GMT",
"version": "v3"
},
{
"created": "Wed, 27 Sep 2023 09:42:07 GMT",
"version": "v4"
}
] | 2023-09-28 | [
[
"Purohit",
"Avadhut V.",
""
]
] | I have shown that the field defined by the Wheeler-DeWitt equation for \textit{pure gravity} is neither a standard gravitational field nor the field representing a particular universe. The theory offers a unified description of geometry and matter, with geometry being fundamental. The quantum theory possesses gravitati... |
2108.04702 | Xiang-Hua Zhai | Rui Jiang, Rui-Hui Lin and Xiang-Hua Zhai | Superradiant instability of the Kerr-like black hole in
Einstein-bumblebee gravity | 18 pages, 3 figures, 1 table, version accepted for publication in
Physical Review D | null | 10.1103/PhysRevD.104.124004 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact Kerr-like solution has been obtained recently in Einstein-bumblebee
gravity model where Lorentz symmetry is spontaneously broken. In this paper, we
investigate the superradiant instability of the Kerr-like black hole under the
perturbation of a massive scalar field. We find the Lorentz breaking parameter
$L$... | [
{
"created": "Tue, 10 Aug 2021 14:02:50 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Nov 2021 12:39:30 GMT",
"version": "v2"
}
] | 2021-12-15 | [
[
"Jiang",
"Rui",
""
],
[
"Lin",
"Rui-Hui",
""
],
[
"Zhai",
"Xiang-Hua",
""
]
] | An exact Kerr-like solution has been obtained recently in Einstein-bumblebee gravity model where Lorentz symmetry is spontaneously broken. In this paper, we investigate the superradiant instability of the Kerr-like black hole under the perturbation of a massive scalar field. We find the Lorentz breaking parameter $L$ d... |
0812.3759 | Witold Chmielowiec | Witold Chmielowiec, Jerzy Kijowski | Hamiltonian description of radiation phenomena: Trautman-Bondi energy
and corner conditions | 16 pages, 1 figure | Rept.Math.Phys.64:223-240,2009 | 10.1016/S0034-4877(09)90028-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cauchy initial value problem on a hyperboloid is proved to define a
Hamiltonian system, provided the radiation data at null infinity are also taken
into account, as a part of Cauchy data. The "Trautman-Bondi mass", supplemented
by the "already radiated energy" assigned to radiation data, plays role of the
Hamiltonian... | [
{
"created": "Fri, 19 Dec 2008 11:47:03 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Nov 2009 13:25:37 GMT",
"version": "v2"
}
] | 2010-03-04 | [
[
"Chmielowiec",
"Witold",
""
],
[
"Kijowski",
"Jerzy",
""
]
] | Cauchy initial value problem on a hyperboloid is proved to define a Hamiltonian system, provided the radiation data at null infinity are also taken into account, as a part of Cauchy data. The "Trautman-Bondi mass", supplemented by the "already radiated energy" assigned to radiation data, plays role of the Hamiltonian f... |
1008.5023 | Brian Dolan | Brian P. Dolan | The cosmological constant and the black hole equation of state | 20 pages, 4 figures: some typos corrected in v5 | Class.Quant.Grav.28:125020,2011 | 10.1088/0264-9381/28/12/125020 | DIAS-STP-10-10 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamics of black holes in various dimensions are described in the
presence of a negative cosmological constant which is treated as a
thermodynamic variable, interpreted as a pressure in the equation of state. The
black hole mass is then identified with the enthalpy, rather than the internal
energy, and hea... | [
{
"created": "Mon, 30 Aug 2010 08:41:58 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2011 15:42:07 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Aug 2011 15:21:19 GMT",
"version": "v3"
},
{
"created": "Fri, 21 Dec 2012 16:23:47 GMT",
"version": "v4"
}
] | 2012-12-24 | [
[
"Dolan",
"Brian P.",
""
]
] | The thermodynamics of black holes in various dimensions are described in the presence of a negative cosmological constant which is treated as a thermodynamic variable, interpreted as a pressure in the equation of state. The black hole mass is then identified with the enthalpy, rather than the internal energy, and heat ... |
2312.09908 | Sreekanth Harikumar | Sreekanth Harikumar, Laur J\"arv, Margus Saal, Aneta Wojnar, Marek
Biesiada | Propagation and lensing of gravitational waves in Palatini $f(\hat R)$
gravity | null | null | 10.1103/PhysRevD.109.124014 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Accelerated expansion of the Universe prompted searches of modified gravity
theory beyond general relativity, instead of adding a mysterious dark energy
component with exotic physical properties. One such alternative gravity
approach is metric-affine Palatini $f(\hat{R})$ theory. By now routine
gravitational wave det... | [
{
"created": "Fri, 15 Dec 2023 16:12:28 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Jun 2024 08:10:37 GMT",
"version": "v2"
}
] | 2024-06-11 | [
[
"Harikumar",
"Sreekanth",
""
],
[
"Järv",
"Laur",
""
],
[
"Saal",
"Margus",
""
],
[
"Wojnar",
"Aneta",
""
],
[
"Biesiada",
"Marek",
""
]
] | Accelerated expansion of the Universe prompted searches of modified gravity theory beyond general relativity, instead of adding a mysterious dark energy component with exotic physical properties. One such alternative gravity approach is metric-affine Palatini $f(\hat{R})$ theory. By now routine gravitational wave detec... |
gr-qc/9807058 | Perjes Zoltan | Michael Bradley, Gyula Fodor, L\'aszl\'o \'A. Gergely, Mattias
Marklund and Zolt\'an Perj\'es | Rotating perfect fluid sources of the NUT metric | 8 pages, latex | Class.Quant.Grav. 16 (1999) 1667-1675 | 10.1088/0264-9381/16/6/301 | null | gr-qc | null | Locally rotationally symmetric perfect fluid solutions of Einstein's
gravitational equations are matched along the hypersurface of vanishing
pressure with the NUT metric. These rigidly rotating fluids are interpreted as
sources for the vacuum exterior which consists only of a stationary region of
the Taub-NUT space-t... | [
{
"created": "Tue, 21 Jul 1998 14:37:51 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Bradley",
"Michael",
""
],
[
"Fodor",
"Gyula",
""
],
[
"Gergely",
"László Á.",
""
],
[
"Marklund",
"Mattias",
""
],
[
"Perjés",
"Zoltán",
""
]
] | Locally rotationally symmetric perfect fluid solutions of Einstein's gravitational equations are matched along the hypersurface of vanishing pressure with the NUT metric. These rigidly rotating fluids are interpreted as sources for the vacuum exterior which consists only of a stationary region of the Taub-NUT space-tim... |
1504.02112 | Maria J. Rodriguez | Samuel E. Gralla and Alexandru Lupsasca and Maria J. Rodriguez | Note on Bunching of Field Lines in Black Hole Magnetospheres | 4 pages, 1 figure v2: minor changes | Phys. Rev. D 92, 044053 (2015) | 10.1103/PhysRevD.92.044053 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical simulations of Blandford-Znajek energy extraction at high spin have
revealed that field lines tend to bunch near the poles of the event horizon. We
show that this behavior can be derived analytically from the assumption of
fixed functional dependence of current and field line rotation on magnetic
flux. The ... | [
{
"created": "Wed, 8 Apr 2015 20:11:42 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Sep 2015 23:16:53 GMT",
"version": "v2"
}
] | 2015-09-15 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Lupsasca",
"Alexandru",
""
],
[
"Rodriguez",
"Maria J.",
""
]
] | Numerical simulations of Blandford-Znajek energy extraction at high spin have revealed that field lines tend to bunch near the poles of the event horizon. We show that this behavior can be derived analytically from the assumption of fixed functional dependence of current and field line rotation on magnetic flux. The ar... |
gr-qc/0106002 | Stefano Liberati | Carlos Barcelo, Matt Visser and Stefano Liberati | Einstein Gravity as an emergent phenomenon? | 8 pages, Essay awarded an honorable mention in the year 2001 Gravity
Research Foundation essay competition | Int.J.Mod.Phys.D10:799-806,2001 | 10.1142/S0218271801001591 | null | gr-qc | null | In this essay we marshal evidence suggesting that Einstein gravity may be an
emergent phenomenon, one that is not ``fundamental'' but rather is an almost
automatic low-energy long-distance consequence of a wide class of theories.
Specifically, the emergence of a curved spacetime ``effective Lorentzian
geometry'' is a... | [
{
"created": "Fri, 1 Jun 2001 20:23:44 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Barcelo",
"Carlos",
""
],
[
"Visser",
"Matt",
""
],
[
"Liberati",
"Stefano",
""
]
] | In this essay we marshal evidence suggesting that Einstein gravity may be an emergent phenomenon, one that is not ``fundamental'' but rather is an almost automatic low-energy long-distance consequence of a wide class of theories. Specifically, the emergence of a curved spacetime ``effective Lorentzian geometry'' is a c... |
1508.06231 | Lorenzo Iorio | Lorenzo Iorio | Accurate characterization of the stellar and orbital parameters of the
exoplanetary system WASP-33 b from orbital dynamics | LaTex2e, 1 figure, 1 table, 8 pages. Finale version accepted for
publication in Monthly Notices of the Royal Astronomical Society (MNRAS) | Mon.Not.Roy.Astron.Soc.455:207-213,2016 | 10.1093/mnras/stv2328 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using the most recently published Doppler tomography measurements and
accurate theoretical modeling of the oblateness-driven orbital precessions, we
tightly constrain some of the physical and orbital parameters of the planetary
system hosted by the fast rotating star WASP-33. In particular, the
measurements of the... | [
{
"created": "Tue, 25 Aug 2015 17:44:46 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Aug 2015 13:06:00 GMT",
"version": "v2"
},
{
"created": "Sat, 29 Aug 2015 13:14:07 GMT",
"version": "v3"
},
{
"created": "Sat, 12 Sep 2015 20:50:26 GMT",
"version": "v4"
},
{
"c... | 2015-11-05 | [
[
"Iorio",
"Lorenzo",
""
]
] | By using the most recently published Doppler tomography measurements and accurate theoretical modeling of the oblateness-driven orbital precessions, we tightly constrain some of the physical and orbital parameters of the planetary system hosted by the fast rotating star WASP-33. In particular, the measurements of the o... |
gr-qc/9906073 | Kerstin E. Kunze | Kerstin E. Kunze | Asymptotic Behaviour of Inhomogeneous String Cosmologies | 15 pages, Latex | Class.Quant.Grav.16:3795-3806,1999 | 10.1088/0264-9381/16/12/303 | ETH-TH/99-18 | gr-qc hep-th | null | The asymptotic behaviour at late times of inhomogeneous axion-dilaton
cosmologies is investigated. The space-times considered here admit two abelian
space-like Killing vectors. These space-times evolve towards an anisotropic
universe containing gravitational radiation. Furthermore, a peeling-off
behaviour of the Weyl... | [
{
"created": "Thu, 17 Jun 1999 10:58:17 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Kunze",
"Kerstin E.",
""
]
] | The asymptotic behaviour at late times of inhomogeneous axion-dilaton cosmologies is investigated. The space-times considered here admit two abelian space-like Killing vectors. These space-times evolve towards an anisotropic universe containing gravitational radiation. Furthermore, a peeling-off behaviour of the Weyl t... |
1012.1582 | Larry Ford | Jen-Tsung Hsiang, L. H. Ford, Da-Shin Lee and Hoi-Lai Yu | Quantum Modifications to Gravity Waves in de Sitter Spacetime | 13 pages, no figures | Phys.Rev.D83:084027,2011 | 10.1103/PhysRevD.83.084027 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We treat a model in which tensor perturbations of de~Sitter spacetime,
represented as a spatially flat model, are modified by the effects of the
vacuum fluctuations of a massless conformally invariant field, such as the
electromagnetic field. We use the semiclassical theory of gravity with the
expectation value of th... | [
{
"created": "Tue, 7 Dec 2010 19:22:02 GMT",
"version": "v1"
}
] | 2011-05-05 | [
[
"Hsiang",
"Jen-Tsung",
""
],
[
"Ford",
"L. H.",
""
],
[
"Lee",
"Da-Shin",
""
],
[
"Yu",
"Hoi-Lai",
""
]
] | We treat a model in which tensor perturbations of de~Sitter spacetime, represented as a spatially flat model, are modified by the effects of the vacuum fluctuations of a massless conformally invariant field, such as the electromagnetic field. We use the semiclassical theory of gravity with the expectation value of the ... |
1209.6349 | Tanja Hinderer | Alessandra Buonanno, Guillaume Faye, Tanja Hinderer | Spin effects on gravitational waves from inspiraling compact binaries at
second post-Newtonian order | 15 pages, expressions available in mathematica format upon request | Phys. Rev. D 87, 044009 (2013) | 10.1103/PhysRevD.87.044009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the gravitational waveform for spinning, precessing compact
binary inspirals through second post-Newtonian order in the amplitude. When
spins are collinear with the orbital angular momentum and the orbits are
quasi-circular, we further provide explicit expressions for the
gravitational-wave polarizations... | [
{
"created": "Thu, 27 Sep 2012 19:55:09 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Mar 2013 15:30:15 GMT",
"version": "v2"
}
] | 2013-03-19 | [
[
"Buonanno",
"Alessandra",
""
],
[
"Faye",
"Guillaume",
""
],
[
"Hinderer",
"Tanja",
""
]
] | We calculate the gravitational waveform for spinning, precessing compact binary inspirals through second post-Newtonian order in the amplitude. When spins are collinear with the orbital angular momentum and the orbits are quasi-circular, we further provide explicit expressions for the gravitational-wave polarizations a... |
1709.10458 | Filipe Mena | Irene Brito, M. F. A. da Silva, Filipe C. Mena, N. O. Santos | Cylindrically symmetric inhomogeneous dust collapse with a zero
expansion component | 18 pages, 2 figures | null | 10.1088/1361-6382/aa8aa8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a class of cylindrically symmetric inhomogeneous
$\Lambda$-dust spacetimes which have a regular axis and some zero expansion
component. For $\Lambda\ne 0$, we obtain new exact solutions to the Einstein
equations and show that they are unique, within that class. For $\Lambda=0$, we
recover the Senovilla... | [
{
"created": "Fri, 29 Sep 2017 15:36:15 GMT",
"version": "v1"
}
] | 2017-10-11 | [
[
"Brito",
"Irene",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Mena",
"Filipe C.",
""
],
[
"Santos",
"N. O.",
""
]
] | We investigate a class of cylindrically symmetric inhomogeneous $\Lambda$-dust spacetimes which have a regular axis and some zero expansion component. For $\Lambda\ne 0$, we obtain new exact solutions to the Einstein equations and show that they are unique, within that class. For $\Lambda=0$, we recover the Senovilla-V... |
0704.1109 | Patricio S. Letelier | Valeria M. Rosa and Patricio S. letelier | Spinning Strings, Black Holes and Stable Closed Timelike Geodesics | 5 pages, RevTex4, some corrections and new material added | Int.J.Theor.Phys.49:316-323,2010 | 10.1007/s10773-009-0204-x | null | gr-qc | null | The existence and stability under linear perturbation of closed timelike
curves in the spacetime associated to Schwarzschild black hole pierced by a
spinning string are studied. Due to the superposition of the black hole, we
find that the spinning string spacetime is deformed in such a way to allow the
existence of c... | [
{
"created": "Mon, 9 Apr 2007 14:45:43 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jan 2008 20:15:01 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Rosa",
"Valeria M.",
""
],
[
"letelier",
"Patricio S.",
""
]
] | The existence and stability under linear perturbation of closed timelike curves in the spacetime associated to Schwarzschild black hole pierced by a spinning string are studied. Due to the superposition of the black hole, we find that the spinning string spacetime is deformed in such a way to allow the existence of clo... |
gr-qc/9902036 | Luis O. Pimentel | Luis O. Pimentel | Inhomogeneous String Cosmology Solutions with Regular Spacetime
Curvature | LaTeX, 6 pges | Mod.Phys.Lett. A14 (1999) 43-50 | 10.1142/S0217732399000079 | UAMI-GA-990031 | gr-qc | null | In this work cosmological models are considered for the low energy string
cosmological effective action (tree level) in the absence of dilaton potential.
A two parametric non-diagonal family of analytic solutions is found. The
curvature is non singular, however the string coupling diverges exponentially.
| [
{
"created": "Thu, 11 Feb 1999 19:00:46 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Pimentel",
"Luis O.",
""
]
] | In this work cosmological models are considered for the low energy string cosmological effective action (tree level) in the absence of dilaton potential. A two parametric non-diagonal family of analytic solutions is found. The curvature is non singular, however the string coupling diverges exponentially. |
gr-qc/9801057 | Alessandro D. A. M. Spallicci | Alessandro D.A.M. Spallicci (Univ. Salerno at Benvento, Gravitation
Research Group) & (Univ. Leiden, Fac. Math. & Nat. Sc., Dept. Phys. & Astr.,
Kamerlingh Onnes Lab.) | On the perturbed Schwarzschild geometry for determination of particle
motion | Second Amaldi Conference on Gravitational Waves, 1-4 July 1997, CERN
Geneve | null | null | null | gr-qc | null | A novel method for calculation of the motion and radiation reaction for the
two-body problem (body plus particle, the small parameter m/M being the ratio
of the masses) is presented. In the background curvature given by the
Schwarzschild geometry rippled by gravitational waves, the geodesic equations
insure the prese... | [
{
"created": "Fri, 16 Jan 1998 17:56:03 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Spallicci",
"Alessandro D. A. M.",
"",
"Univ. Salerno at Benvento, Gravitation\n Research Group"
]
] | A novel method for calculation of the motion and radiation reaction for the two-body problem (body plus particle, the small parameter m/M being the ratio of the masses) is presented. In the background curvature given by the Schwarzschild geometry rippled by gravitational waves, the geodesic equations insure the presenc... |
2004.00479 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Swampland Implications of GW170817-compatible Einstein-Gauss-Bonnet
Gravity | Revised version, PLB Accepted | null | 10.1016/j.physletb.2020.135437 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the Einstein-Gauss-Bonnet theory in view of the GW170817 event,
which compels that the gravitational wave speed is equal to $c_T^2=1$ in
natural units. We use an alternative approach compared to one previous work of
ours, which enables us to express all the slow-roll indices and the
observational indices a... | [
{
"created": "Wed, 1 Apr 2020 14:50:43 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Apr 2020 15:51:27 GMT",
"version": "v2"
}
] | 2020-04-22 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | We revisit the Einstein-Gauss-Bonnet theory in view of the GW170817 event, which compels that the gravitational wave speed is equal to $c_T^2=1$ in natural units. We use an alternative approach compared to one previous work of ours, which enables us to express all the slow-roll indices and the observational indices as ... |
1702.06263 | Carlos A. S. Almeida | D. F. S. Veras and C. A. S. Almeida | Corrections to Newton's law of gravitation in the context of
codimension-1 warped thick braneworlds | 24 pages, 15 figures. Replaced in order to match the modified version
accepted to PRD. Minor text modifications | Phys. Rev. D 95, 104032 (2017) | 10.1103/PhysRevD.95.104032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we compute the corrections in the Newton's law of gravitation
due to Kaluza-Klein gravitons in codimension-1 warped thick braneworld
scenarios. We focus in some models recently proposed in the literature, the
so-called asymmetric hybrid brane and compact brane. Such models are
deformations of the $\phi^... | [
{
"created": "Tue, 21 Feb 2017 04:49:17 GMT",
"version": "v1"
},
{
"created": "Mon, 15 May 2017 20:35:31 GMT",
"version": "v2"
}
] | 2017-05-31 | [
[
"Veras",
"D. F. S.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | In this work, we compute the corrections in the Newton's law of gravitation due to Kaluza-Klein gravitons in codimension-1 warped thick braneworld scenarios. We focus in some models recently proposed in the literature, the so-called asymmetric hybrid brane and compact brane. Such models are deformations of the $\phi^4$... |
0911.0177 | Anil Yadav dr | Anil Kumar Yadav | Bianchi Type V Matter Filled Universe with Varying Lambda Term in
General Relativity | 16 pages, 3 figures | EJTP 10: 169 - 182, 2013 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bianchi type V matter filled universe with varying lambda in general
relativity are investigated by using the law of variation for the generalized
mean Hubble parameter. This yields the constant value of deceleration parameter
and generates two types of solutions for the average scale factor one is of
power law type ... | [
{
"created": "Sun, 1 Nov 2009 16:19:32 GMT",
"version": "v1"
}
] | 2013-01-15 | [
[
"Yadav",
"Anil Kumar",
""
]
] | Bianchi type V matter filled universe with varying lambda in general relativity are investigated by using the law of variation for the generalized mean Hubble parameter. This yields the constant value of deceleration parameter and generates two types of solutions for the average scale factor one is of power law type an... |
1201.1697 | Glenn D. Starkman | Glenn D. Starkman | Modifying Gravity: You Can't Always Get What You Want | A talk given at the Royal Society Discussion Session "Gravity,"
Chicheley Hall, UK Feb. 2011 | Phil. Trans. R. Soc. A 28 December 2011 vol. 369 no. 1957
5018-5041 | 10.1098/rsta.2011.0292 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The combination of GR and the Standard Model disagrees with numerous
observations on scales from our Solar System up. In the concordance model of
cosmology, these contradictions are removed or alleviated by the introduction
of three completely independent new components of stress-energy -- the
inflaton, dark matter, ... | [
{
"created": "Mon, 9 Jan 2012 06:46:26 GMT",
"version": "v1"
}
] | 2012-01-10 | [
[
"Starkman",
"Glenn D.",
""
]
] | The combination of GR and the Standard Model disagrees with numerous observations on scales from our Solar System up. In the concordance model of cosmology, these contradictions are removed or alleviated by the introduction of three completely independent new components of stress-energy -- the inflaton, dark matter, an... |
2209.05749 | Souvik Ghose | Anirban Chanda and Arpan Krishna Mitra and Souvik Ghose and Sagar Dey
and Bikash Chandra Paul | Barrow Holographic Dark Energy in Brane World Cosmology | uses article class, 30 pages, 25 figures, 2 tables (v4) typo
corrected, new figure, analysis and reference added, matches the published
version(class. Quant. Grav.) | Class. Quantum Grav. 41 035004 (2024) | 10.1088/1361-6382/ad1af3 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Cosmological features of Barrow Holographic Dark Energy (BHDE), a recent
generalization of original Holographic dark energy with a richer structure, are
studied in the context of DGP brane, RS II brane-world, and the cyclic
universe. It is found that a flat FRW scenario with pressure less dust and a
dark energy compo... | [
{
"created": "Tue, 13 Sep 2022 06:28:06 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Sep 2022 07:33:09 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Jul 2023 11:41:12 GMT",
"version": "v3"
},
{
"created": "Sat, 20 Jan 2024 06:11:43 GMT",
"version": "v4"
}
] | 2024-01-23 | [
[
"Chanda",
"Anirban",
""
],
[
"Mitra",
"Arpan Krishna",
""
],
[
"Ghose",
"Souvik",
""
],
[
"Dey",
"Sagar",
""
],
[
"Paul",
"Bikash Chandra",
""
]
] | Cosmological features of Barrow Holographic Dark Energy (BHDE), a recent generalization of original Holographic dark energy with a richer structure, are studied in the context of DGP brane, RS II brane-world, and the cyclic universe. It is found that a flat FRW scenario with pressure less dust and a dark energy compone... |
1605.02005 | Anuj Kumar Dubey Mr. | Anuj Kumar Dubey and A. K. Sen | Frame-Dragging from Charged Rotating Body | arXiv admin note: text overlap with arXiv:0811.2471 by other authors | J. Phys.: Conf. Ser. 759, 1, 012065 ( 2016) | 10.1088/1742-6596/759/1/012065 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we have considered the three parameters: mass, charge
and rotation to discuss their combined effect on frame dragging for a charged
rotating body. If we consider the ray of light which is emitted radially
outward from a rotating body then the frame dragging shows a periodic nature
with respect t... | [
{
"created": "Fri, 6 May 2016 17:03:29 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Dubey",
"Anuj Kumar",
""
],
[
"Sen",
"A. K.",
""
]
] | In the present paper, we have considered the three parameters: mass, charge and rotation to discuss their combined effect on frame dragging for a charged rotating body. If we consider the ray of light which is emitted radially outward from a rotating body then the frame dragging shows a periodic nature with respect to ... |
1510.08552 | Bo-Qiang Ma | Bofeng Wu, Bo-Qiang Ma | Spherically symmetric solution of $f(R,\mathcal{G})$ gravity at low
energy | 14 latex files, 11 figures | Phys.Rev. D92 (2015) 4, 044012 | 10.1103/PhysRevD.92.044012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The weak-field and slow-motion limit of $f(R,\mathcal{G})$ gravity is
developed up to $(v/c)^{4}$ order in a spherically symmetric background.
Considering the Taylor expansion of a general function $f$ around vanishing
values of $R$ and $\mathcal{G}$, we present general vacuum solutions up to
$(v/c)^{4}$ order for th... | [
{
"created": "Thu, 29 Oct 2015 02:56:34 GMT",
"version": "v1"
}
] | 2015-11-05 | [
[
"Wu",
"Bofeng",
""
],
[
"Ma",
"Bo-Qiang",
""
]
] | The weak-field and slow-motion limit of $f(R,\mathcal{G})$ gravity is developed up to $(v/c)^{4}$ order in a spherically symmetric background. Considering the Taylor expansion of a general function $f$ around vanishing values of $R$ and $\mathcal{G}$, we present general vacuum solutions up to $(v/c)^{4}$ order for the ... |
1506.06032 | Richard O'Shaughnessy | Brandon Miller (1), Richard O'Shaughnessy (1), Tyson B. Littenberg
(2), Ben Farr (3) ((1) CCRG, Rochester Institute of Technology, (2) CIERA,
Northwestern University, (3) Enrico Fermi Institute, University of Chicago) | Rapid gravitational wave parameter estimation with a single spin:
Systematic uncertainties in parameter estimation with the SpinTaylorF2
approximation | Submitted to PRD. (12 pages, 9 figures) | Phys. Rev. D 92, 044056 (2015) | 10.1103/PhysRevD.92.044056 | LIGO DCC P1500090 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Reliable low-latency gravitational wave parameter estimation is essential to
target limited electromagnetic followup facilities toward astrophysically
interesting and electromagnetically relevant sources of gravitational waves. In
this study, we examine the tradeoff between speed and accuracy. Specifically,
we estima... | [
{
"created": "Fri, 19 Jun 2015 14:45:22 GMT",
"version": "v1"
}
] | 2015-09-09 | [
[
"Miller",
"Brandon",
""
],
[
"O'Shaughnessy",
"Richard",
""
],
[
"Littenberg",
"Tyson B.",
""
],
[
"Farr",
"Ben",
""
]
] | Reliable low-latency gravitational wave parameter estimation is essential to target limited electromagnetic followup facilities toward astrophysically interesting and electromagnetically relevant sources of gravitational waves. In this study, we examine the tradeoff between speed and accuracy. Specifically, we estimate... |
1301.1485 | Sunil Maharaj | S. Thirukkanesh, S. S. Rajah, S. D. Maharaj | Shearing radiative collapse with expansion and acceleration | 16 pages, To appear in J. Math. Phys | J. Math. Phys. 53: 032506, 2012 | 10.1063/1.3698286 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the behaviour of a relativistic spherically symmetric
radiative star with an accelerating, expanding and shearing interior matter
distribution in the presence of anisotropic pressures. The junction condition
can be written in standard form in three cases: linear, Bernoulli and Riccati
equations. We can... | [
{
"created": "Tue, 8 Jan 2013 10:57:37 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Thirukkanesh",
"S.",
""
],
[
"Rajah",
"S. S.",
""
],
[
"Maharaj",
"S. D.",
""
]
] | We investigate the behaviour of a relativistic spherically symmetric radiative star with an accelerating, expanding and shearing interior matter distribution in the presence of anisotropic pressures. The junction condition can be written in standard form in three cases: linear, Bernoulli and Riccati equations. We can i... |
gr-qc/0204007 | Paola Zizzi | P. A. Zizzi | Quantum Computing Spacetime | 12 pages, 5 figures | null | null | null | gr-qc quant-ph | null | A causal set C can describe a discrete spacetime, but this discrete spacetime
is not quantum, because C is endowed with Boolean logic, as it does not allow
cycles. In a quasi-ordered set Q, cycles are allowed. In this paper, we
consider a subset QC of a quasi-ordered set Q, whose elements are all the
cycles. In QC, w... | [
{
"created": "Tue, 2 Apr 2002 08:13:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Zizzi",
"P. A.",
""
]
] | A causal set C can describe a discrete spacetime, but this discrete spacetime is not quantum, because C is endowed with Boolean logic, as it does not allow cycles. In a quasi-ordered set Q, cycles are allowed. In this paper, we consider a subset QC of a quasi-ordered set Q, whose elements are all the cycles. In QC, whi... |
1812.08663 | Fredy Dubeibe | F. L. Dubeibe, J. D. Arias H. and J. E. Alfonso | Geodesic dynamics in Chazy-Curzon spacetimes | 13 pages, 9 figures, Accepted for publication in The Indian Journal
of Physics | Indian J Phys (December 2019) 93(12):1635-1641 | 10.1007/s12648-019-01416-8 | null | gr-qc math.DS nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the last decades, the dynamical studies around compact objects became a
subject of active research, partially motivated by the observed differences in
the profiles of the gravitational waves depending on the dynamics of the
system. In this work, via the Poincar\'e section method, we conduct a thorough
numerical an... | [
{
"created": "Thu, 20 Dec 2018 16:09:58 GMT",
"version": "v1"
}
] | 2020-03-12 | [
[
"Dubeibe",
"F. L.",
""
],
[
"H.",
"J. D. Arias",
""
],
[
"Alfonso",
"J. E.",
""
]
] | In the last decades, the dynamical studies around compact objects became a subject of active research, partially motivated by the observed differences in the profiles of the gravitational waves depending on the dynamics of the system. In this work, via the Poincar\'e section method, we conduct a thorough numerical anal... |
1111.2867 | Etera R. Livine | Etera R. Livine, Mercedes Mart\'in-Benito | Classical Setting and Effective Dynamics for Spinfoam Cosmology | 38 pages, v2: Link with discretized loop quantum gravity made
explicit and emphasized | Class. Quantum Grav. 30 (2013) 035006 | 10.1088/0264-9381/30/3/035006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore how to extract effective dynamics from loop quantum gravity and
spinfoams truncated to a finite fixed graph, with the hope of modeling
symmetry-reduced gravitational systems. We particularize our study to the
2-vertex graph with N links. We describe the canonical data using the recent
formulation of the ph... | [
{
"created": "Fri, 11 Nov 2011 21:13:38 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jul 2013 15:23:01 GMT",
"version": "v2"
}
] | 2013-07-09 | [
[
"Livine",
"Etera R.",
""
],
[
"Martín-Benito",
"Mercedes",
""
]
] | We explore how to extract effective dynamics from loop quantum gravity and spinfoams truncated to a finite fixed graph, with the hope of modeling symmetry-reduced gravitational systems. We particularize our study to the 2-vertex graph with N links. We describe the canonical data using the recent formulation of the phas... |
gr-qc/0611041 | Jose Edgar Madriz Aguilar | Jose Edgar Madriz Aguilar | Gravitational Waves generated during inflation from a 5D vacuum theory
of gravity in a de Sitter expansion | null | Phys.Lett.B645:6-11,2007 | 10.1016/j.physletb.2006.11.051 | null | gr-qc astro-ph hep-th | null | In this letter we study the generation of gravitational waves during
inflation from a 5D vacuum theory of gravity. Within this formalism, on an
effective 4D de Sitter background, we recover the typical results obtained with
4D inflationary theory in general relativity, for the amplitude of
gravitational waves generat... | [
{
"created": "Mon, 6 Nov 2006 20:25:27 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jan 2007 15:29:07 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Aguilar",
"Jose Edgar Madriz",
""
]
] | In this letter we study the generation of gravitational waves during inflation from a 5D vacuum theory of gravity. Within this formalism, on an effective 4D de Sitter background, we recover the typical results obtained with 4D inflationary theory in general relativity, for the amplitude of gravitational waves generated... |
1108.0744 | Shahar Hod | Shahar Hod | Hyperentropic systems and the generalized second law of thermodynamics | 5 pages | Phys.Lett.B700:75-78,2011 | 10.1016/j.physletb.2011.04.048 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The holographic bound asserts that the entropy $S$ of a system is bounded
from above by a quarter of the area ${\cal A}$ of a circumscribing surface
measured in Planck areas: $S\leq {\cal A}/4{\ell^2_P}$. This bound is widely
regarded a desideratum of any fundamental theory. Moreover, it was argued that
the holograph... | [
{
"created": "Wed, 3 Aug 2011 05:30:05 GMT",
"version": "v1"
}
] | 2011-08-04 | [
[
"Hod",
"Shahar",
""
]
] | The holographic bound asserts that the entropy $S$ of a system is bounded from above by a quarter of the area ${\cal A}$ of a circumscribing surface measured in Planck areas: $S\leq {\cal A}/4{\ell^2_P}$. This bound is widely regarded a desideratum of any fundamental theory. Moreover, it was argued that the holographic... |
1809.01961 | Emilio Elizalde | Emilio Elizalde, Martiros Khurshudyan, Shin'ichi Nojiri | Cosmological singularities in interacting dark energy models with an
$\omega(q)$ parametrization | 20 pages, to appear in IJMPD | null | 10.1142/S0218271819500196 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Future singularities arising in a family of models for the expanding
Universe, characterized by sharing a convenient parametrization of the energy
budget in terms of the deceleration parameter, are classified. Finite-time
future singularities are known to appear in many cosmological scenarios, in
particular, in the p... | [
{
"created": "Thu, 6 Sep 2018 13:11:16 GMT",
"version": "v1"
}
] | 2019-01-23 | [
[
"Elizalde",
"Emilio",
""
],
[
"Khurshudyan",
"Martiros",
""
],
[
"Nojiri",
"Shin'ichi",
""
]
] | Future singularities arising in a family of models for the expanding Universe, characterized by sharing a convenient parametrization of the energy budget in terms of the deceleration parameter, are classified. Finite-time future singularities are known to appear in many cosmological scenarios, in particular, in the pre... |
gr-qc/0010110 | Takahiro Tanaka | Takahiro Tanaka and T. P. Singh | Analytic derivation of the map of null rays passing near a naked
singularity | 4 pages, submitted to Phys. Rev. D | Phys.Rev. D63 (2001) 124021 | 10.1103/PhysRevD.63.124021 | YITP-00-57 | gr-qc | null | Recently the energy emission from a naked singularity forming in spherical
dust collapse has been investigated. This radiation is due to the particle
creation in a curved spacetime. In this discussion, the central role is played
by the mapping formula between the incoming and the outgoing null coordinates.
For the se... | [
{
"created": "Tue, 31 Oct 2000 03:18:40 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Tanaka",
"Takahiro",
""
],
[
"Singh",
"T. P.",
""
]
] | Recently the energy emission from a naked singularity forming in spherical dust collapse has been investigated. This radiation is due to the particle creation in a curved spacetime. In this discussion, the central role is played by the mapping formula between the incoming and the outgoing null coordinates. For the self... |
2107.06551 | Masaru Siino | Masaru Siino | Black hole shadow and Wandering null geodesics | 15 pages, 3figures, One of main results (prop.2) has been corrected.
Some inappropriate sentences are removed | null | 10.1103/PhysRevD.106.044020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The role of the wandering null geodesic is studied in a black hole spacetime.
Based on the continuity of the solution of the geodesic equation, the wandering
null geodesics commonly exist and explain the typical phenomena of the optical
observation of event horizons. Moreover, a new concept of `black room' is
investi... | [
{
"created": "Wed, 14 Jul 2021 08:34:55 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2022 08:23:57 GMT",
"version": "v2"
}
] | 2022-08-31 | [
[
"Siino",
"Masaru",
""
]
] | The role of the wandering null geodesic is studied in a black hole spacetime. Based on the continuity of the solution of the geodesic equation, the wandering null geodesics commonly exist and explain the typical phenomena of the optical observation of event horizons. Moreover, a new concept of `black room' is investiga... |
gr-qc/0404012 | L. Arturo Urena-Lopez | Octavio Obregon, L. Arturo Urena-Lopez and Franz E. Schunck | Oscillatons formed by non linear gravity | Revtex file, 6 pages, 3 eps figure; matches version published in PRD | Phys.Rev. D72 (2005) 024004 | 10.1103/PhysRevD.72.024004 | null | gr-qc | null | Oscillatons are solutions of the coupled Einstein-Klein-Gordon (EKG)
equations that are globally regular and asymptotically flat. By means of a
Legendre transformation we are able to visualize the behaviour of the
corresponding objects in non-linear gravity where the scalar field has been
absorbed by means of the con... | [
{
"created": "Thu, 1 Apr 2004 20:17:16 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Aug 2005 18:44:47 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Obregon",
"Octavio",
""
],
[
"Urena-Lopez",
"L. Arturo",
""
],
[
"Schunck",
"Franz E.",
""
]
] | Oscillatons are solutions of the coupled Einstein-Klein-Gordon (EKG) equations that are globally regular and asymptotically flat. By means of a Legendre transformation we are able to visualize the behaviour of the corresponding objects in non-linear gravity where the scalar field has been absorbed by means of the confo... |
0812.2406 | Marco Pizzi | Marco Pizzi, Armando Paolino | Intersections of self-gravitating charged shells in a Reissner-Nordstrom
field | 21 pages, 1 figure;v3 added references | Int.J.Mod.Phys.D18:1955-1975,2009 | 10.1142/S0218271809015047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the equation of motion of two charged spherical shells with
tangential pressure in the field of a central Reissner-Nordstrom (RN) source.
We solve the problem of determining the motion of the two shells \textsl{after}
the intersection by solving the related Einstein-Maxwell equations and by
requiring a ph... | [
{
"created": "Fri, 12 Dec 2008 16:02:00 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Dec 2008 14:12:13 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jan 2009 13:23:11 GMT",
"version": "v3"
}
] | 2010-01-06 | [
[
"Pizzi",
"Marco",
""
],
[
"Paolino",
"Armando",
""
]
] | We describe the equation of motion of two charged spherical shells with tangential pressure in the field of a central Reissner-Nordstrom (RN) source. We solve the problem of determining the motion of the two shells \textsl{after} the intersection by solving the related Einstein-Maxwell equations and by requiring a phys... |
1305.4884 | T. Damour | Donato Bini and Thibault Damour | Analytical determination of the two-body gravitational interaction
potential at the 4th post-Newtonian approximation | 6 pages, no figures | null | 10.1103/PhysRevD.87.121501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We complete the analytical determination, at the 4th post-Newtonian
approximation, of the main radial potential describing the gravitational
interaction of two bodies within the effective one-body formalism. The (non
logarithmic) coefficient a_5 (nu) measuring this 4th post-Newtonian interaction
potential is found to... | [
{
"created": "Tue, 21 May 2013 17:06:02 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Bini",
"Donato",
""
],
[
"Damour",
"Thibault",
""
]
] | We complete the analytical determination, at the 4th post-Newtonian approximation, of the main radial potential describing the gravitational interaction of two bodies within the effective one-body formalism. The (non logarithmic) coefficient a_5 (nu) measuring this 4th post-Newtonian interaction potential is found to b... |
1607.03743 | Thomas Philbin | T.G. Philbin | An exact solution for the Hawking effect in a dispersive fluid | 18 pages, minor changes | Phys. Rev. D 94, 064053 (2016) | 10.1103/PhysRevD.94.064053 | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the wave equation for sound in a moving fluid with a fourth-order
anomalous dispersion relation. The velocity of the fluid is a linear function
of position, giving two points in the flow where the fluid velocity matches the
group velocity of low-frequency waves. We find the exact solution for wave
propaga... | [
{
"created": "Wed, 13 Jul 2016 14:06:57 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jul 2016 14:54:24 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Sep 2016 15:24:46 GMT",
"version": "v3"
}
] | 2016-09-29 | [
[
"Philbin",
"T. G.",
""
]
] | We consider the wave equation for sound in a moving fluid with a fourth-order anomalous dispersion relation. The velocity of the fluid is a linear function of position, giving two points in the flow where the fluid velocity matches the group velocity of low-frequency waves. We find the exact solution for wave propagati... |
2401.09737 | Salvatore Capozziello | Salvatore Capozziello and Carmen Ferrara | The Equivalence Principle as a Noether Symmetry | 10 pages, to appear in International Journal of Geometric Methods in
Modern Physics | null | 10.1142/S0219887824400140 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The Equivalence Principle is considered in the framework of metric-affine
gravity. We show that it naturally emerges as a Noether symmetry starting from
a general non-metric theory. In particular, we discuss the Einstein Equivalence
Principle and the Strong Equivalence Principle showing their relations with the
non-m... | [
{
"created": "Thu, 18 Jan 2024 05:36:35 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jan 2024 14:22:53 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Jun 2024 06:52:32 GMT",
"version": "v3"
}
] | 2024-06-21 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Ferrara",
"Carmen",
""
]
] | The Equivalence Principle is considered in the framework of metric-affine gravity. We show that it naturally emerges as a Noether symmetry starting from a general non-metric theory. In particular, we discuss the Einstein Equivalence Principle and the Strong Equivalence Principle showing their relations with the non-met... |
1007.5371 | Edwin J. Son | Edwin J. Son and Wontae Kim | Note on nonsingular cyclic universes in the deformed Horava-Lifshitz
gravity | 10 pages, 2 figures | Mod.Phys.Lett.A26:719-725,2011 | 10.1142/S0217732311035237 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform the phase space analysis in terms of the linearization technique
in the Ho\v{r}ava-Lifshitz gravity with the softly broken detailed balance
condition. It can be shown that the bouncing universe appears only for the
positive spatial curvature of $k=+1$, and it is possible to obtain oscillating
universe with... | [
{
"created": "Fri, 30 Jul 2010 05:39:59 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Apr 2011 23:16:01 GMT",
"version": "v2"
}
] | 2011-04-21 | [
[
"Son",
"Edwin J.",
""
],
[
"Kim",
"Wontae",
""
]
] | We perform the phase space analysis in terms of the linearization technique in the Ho\v{r}ava-Lifshitz gravity with the softly broken detailed balance condition. It can be shown that the bouncing universe appears only for the positive spatial curvature of $k=+1$, and it is possible to obtain oscillating universe with t... |
1709.09033 | Douglas A. Singleton | Preston Jones, Andri Gretarsson and Douglas Singleton | Low frequency electromagnetic radiation coming from gravitational waves
generated by neutron stars | 16 pages revtex, no figures, 1 table. Version published in PRD | Phys. Rev. D 96, 124030 (2017) | 10.1103/PhysRevD.96.124030 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility of observing very low frequency (VLF)
electromagnetic radiation produced from the vacuum by gravitational waves. We
review the calculations leading to the possibility of vacuum conversion of
gravitational waves into electromagnetic waves and show how this process evades
the well-known p... | [
{
"created": "Sat, 23 Sep 2017 21:08:09 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Dec 2017 22:14:09 GMT",
"version": "v2"
}
] | 2018-01-03 | [
[
"Jones",
"Preston",
""
],
[
"Gretarsson",
"Andri",
""
],
[
"Singleton",
"Douglas",
""
]
] | We investigate the possibility of observing very low frequency (VLF) electromagnetic radiation produced from the vacuum by gravitational waves. We review the calculations leading to the possibility of vacuum conversion of gravitational waves into electromagnetic waves and show how this process evades the well-known pro... |
2306.14581 | Chevarra Hansraj | Jonathan Hakata, Rituparno Goswami, Chevarra Hansraj, Sunil D. Maharaj | What makes a shear-free spherical perfect fluid be inhomogeneous with
tidal effects? | 8 pages, 2 figures | General Relativity and Gravitation (2023) 55:119 | 10.1007/s10714-023-03161-0 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This is an important and natural question as the spacetime shear,
inhomogeneity and tidal effects are all intertwined via the Einstein field
equations. However, as we show in this paper, such scenarios are possible for
limited classes of equations of state that are solutions to a highly non-linear
and fourth order di... | [
{
"created": "Mon, 26 Jun 2023 10:48:17 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Aug 2023 14:34:15 GMT",
"version": "v2"
}
] | 2024-06-18 | [
[
"Hakata",
"Jonathan",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Hansraj",
"Chevarra",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | This is an important and natural question as the spacetime shear, inhomogeneity and tidal effects are all intertwined via the Einstein field equations. However, as we show in this paper, such scenarios are possible for limited classes of equations of state that are solutions to a highly non-linear and fourth order diff... |
1912.10448 | Philip D. Mannheim | Matthew G. Phelps, Asanka Amarasinghe and Philip D. Mannheim | Three-dimensional and four-dimensional scalar, vector, tensor
cosmological fluctuations and the cosmological decomposition theorem | 61 pages | null | 10.1007/s10714-020-02757-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In cosmological perturbation theory it is convenient to use the scalar,
vector, tensor (SVT) basis as defined according to how these components
transform under 3-dimensional rotations. In attempting to solve the fluctuation
equations that are automatically written in terms of gauge-invariant
combinations of these com... | [
{
"created": "Sun, 22 Dec 2019 13:40:00 GMT",
"version": "v1"
}
] | 2021-04-14 | [
[
"Phelps",
"Matthew G.",
""
],
[
"Amarasinghe",
"Asanka",
""
],
[
"Mannheim",
"Philip D.",
""
]
] | In cosmological perturbation theory it is convenient to use the scalar, vector, tensor (SVT) basis as defined according to how these components transform under 3-dimensional rotations. In attempting to solve the fluctuation equations that are automatically written in terms of gauge-invariant combinations of these compo... |
gr-qc/9905069 | Mark J. Hadley | Tammo Diemer and Mark J Hadley | Charge and the topology of spacetime | Accepted by Class. Quantum Grav. More explanation added as advised by
the referee. 13 pages | Class.Quant.Grav. 16 (1999) 3567-3577 | 10.1088/0264-9381/16/11/308 | null | gr-qc | null | A new class of electrically charged wormholes is described in which the outer
two sphere is not spanned by a compact coorientable hypersurface. These
wormholes can therefore display net electric charge from the source free
Maxwell's equation. This extends the work of Sorkin on non-space orientable
manifolds, to space... | [
{
"created": "Wed, 19 May 1999 09:18:58 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Sep 1999 09:22:11 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Diemer",
"Tammo",
""
],
[
"Hadley",
"Mark J",
""
]
] | A new class of electrically charged wormholes is described in which the outer two sphere is not spanned by a compact coorientable hypersurface. These wormholes can therefore display net electric charge from the source free Maxwell's equation. This extends the work of Sorkin on non-space orientable manifolds, to spaceti... |
1612.00632 | Andrea Addazi AndAdd | Andrea Addazi, Stephon Alexander, Yi-Fu Cai and Antonino Marciano | Dark matter and baryogenesis in the Fermi-bounce curvaton mechanism | some phrases are changed, one reference was added, results and
conclusions are the same; 16 pages, 1 figure | Chinese Physics C Vol. 42, No. 6 (2018) 065101 | 10.1088/1674-1137/42/6/065101 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We elaborate on a toy-model of matter bounce, in which the matter content is
constituted by two fermion species endowed with four fermion interaction term.
We describe the curvaton mechanism that is forth generated, and then argue that
one of the two fermionic species may realize baryogenesis, while the other
(lighte... | [
{
"created": "Fri, 2 Dec 2016 11:10:20 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Dec 2016 14:24:20 GMT",
"version": "v2"
}
] | 2018-05-29 | [
[
"Addazi",
"Andrea",
""
],
[
"Alexander",
"Stephon",
""
],
[
"Cai",
"Yi-Fu",
""
],
[
"Marciano",
"Antonino",
""
]
] | We elaborate on a toy-model of matter bounce, in which the matter content is constituted by two fermion species endowed with four fermion interaction term. We describe the curvaton mechanism that is forth generated, and then argue that one of the two fermionic species may realize baryogenesis, while the other (lighter)... |
0809.2590 | Tomasz Pawlowski | Wojciech Kaminski, Jerzy Lewandowski, Tomasz Pawlowski | Physical time and other conceptual issues of QG on the example of LQC | Revtex4, 19 pages, 1 figure, revised to match the version published
in CQG | Class.Quant.Grav.26:035012,2009 | 10.1088/0264-9381/26/3/035012 | IGC-08/9-1 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several conceptual aspects of quantum gravity are studied on the example of
the homogeneous isotropic LQC model. In particular: $(i)$ The proper time of
the co-moving observers is showed to be a quantum operator {and} a quantum
spacetime metric tensor operator is derived. $(ii)$ Solutions of the quantum
scalar constr... | [
{
"created": "Mon, 15 Sep 2008 19:20:21 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jan 2009 10:55:58 GMT",
"version": "v2"
}
] | 2009-01-27 | [
[
"Kaminski",
"Wojciech",
""
],
[
"Lewandowski",
"Jerzy",
""
],
[
"Pawlowski",
"Tomasz",
""
]
] | Several conceptual aspects of quantum gravity are studied on the example of the homogeneous isotropic LQC model. In particular: $(i)$ The proper time of the co-moving observers is showed to be a quantum operator {and} a quantum spacetime metric tensor operator is derived. $(ii)$ Solutions of the quantum scalar constrai... |
0905.3900 | Wlodzimierz Piechocki | Przemyslaw Malkiewicz and Wlodzimierz Piechocki | Dirac quantization of membrane in time dependent orbifold | 16 pages, no figures, version accepted for publication in Journal of
High Energy Physics | JHEP 1008:054,2010 | 10.1007/JHEP08(2010)054 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present quantum theory of a membrane propagating in the vicinity of a time
dependent orbifold singularity. The dynamics of a membrane, with the parameters
space topology of a torus, winding uniformly around compact dimension of the
embedding spacetime is mathematically equivalent to the dynamics of a closed
string... | [
{
"created": "Sun, 24 May 2009 13:37:44 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Aug 2009 11:38:32 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Aug 2010 13:34:15 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Malkiewicz",
"Przemyslaw",
""
],
[
"Piechocki",
"Wlodzimierz",
""
]
] | We present quantum theory of a membrane propagating in the vicinity of a time dependent orbifold singularity. The dynamics of a membrane, with the parameters space topology of a torus, winding uniformly around compact dimension of the embedding spacetime is mathematically equivalent to the dynamics of a closed string i... |
gr-qc/9405023 | null | Ignati Grigentch and D.V.Vassilevich | Reduced phase space quantization of Ashtekar's gravity on de Sitter
background | 9, CEBAF-TH-94-07 | Int.J.Mod.Phys.D4:581-588,1995 | 10.1142/S0218271895000405 | null | gr-qc | null | We solve perturbative constraints and eliminate gauge freedom for Ashtekar's
gravity on de Sitter background. We show that the reduced phase space consists
of transverse, traceless, symmetric fluctuations of the triad and of
transverse, traceless, symmetric fluctuations of the connection. A part of
gauge freedom corr... | [
{
"created": "Mon, 9 May 1994 18:23:58 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Grigentch",
"Ignati",
""
],
[
"Vassilevich",
"D. V.",
""
]
] | We solve perturbative constraints and eliminate gauge freedom for Ashtekar's gravity on de Sitter background. We show that the reduced phase space consists of transverse, traceless, symmetric fluctuations of the triad and of transverse, traceless, symmetric fluctuations of the connection. A part of gauge freedom corres... |
0801.1726 | S Habib Mazharimousavi | S. Habib Mazharimousavi and M. Halilsoy | Higher dimensional Yang-Mills black holes in third order Lovelock
gravity | 14 pages, 3 figures, to appear in Phys. Lett. B | Phys.Lett.B665:125-130,2008 | 10.1016/j.physletb.2008.06.007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By employing the higher (N\TEXTsymbol{>}5) dimensional version of the Wu-Yang
Ansatz we obtain magnetically charged new black hole solutions in the
Einstein-Yang-Mills-Lovelock (EYML) theory with second ($\alpha_{2}$) and third
($\alpha_{3}$)order parameters. These parameters, where $\alpha_{2}$ is also
known as the ... | [
{
"created": "Fri, 11 Jan 2008 07:32:36 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jun 2008 08:20:09 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | By employing the higher (N\TEXTsymbol{>}5) dimensional version of the Wu-Yang Ansatz we obtain magnetically charged new black hole solutions in the Einstein-Yang-Mills-Lovelock (EYML) theory with second ($\alpha_{2}$) and third ($\alpha_{3}$)order parameters. These parameters, where $\alpha_{2}$ is also known as the Ga... |
2207.01694 | Sanjar Shaymatov | Ayyesha K. Ahmed, Sanjar Shaymatov, Bobomurat Ahmedov | Weak cosmic censorship conjecture for the (2+1)-dimensional charged BTZ
black hole in the Einstein-Gauss-Bonnet Gravity | 8 pages, no figures | Physics of the Dark Universe 37, 101082 (2022) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that ($2+1$) dimensional charged BTZ (Banados, Teitelboim,
Zanelli) black hole can be overcharged by a charged scalar field and a charged
particle in contrast to their analogues in ($3+1$) and higher dimensions. In
this regard, it may play an important role to understand more deeply the
properties of... | [
{
"created": "Mon, 4 Jul 2022 19:46:37 GMT",
"version": "v1"
}
] | 2022-07-06 | [
[
"Ahmed",
"Ayyesha K.",
""
],
[
"Shaymatov",
"Sanjar",
""
],
[
"Ahmedov",
"Bobomurat",
""
]
] | It is well known that ($2+1$) dimensional charged BTZ (Banados, Teitelboim, Zanelli) black hole can be overcharged by a charged scalar field and a charged particle in contrast to their analogues in ($3+1$) and higher dimensions. In this regard, it may play an important role to understand more deeply the properties of t... |
1701.05257 | Abraham Harte | Abraham I. Harte | Metric-independence of vacuum and force-free electromagnetic fields | 5 pages, minor additional comments | Phys. Rev. Lett. 118, 141101 (2017) | 10.1103/PhysRevLett.118.141101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Electromagnetic fields which solve the vacuum Maxwell equations in one
spacetime are well-known to also be solutions in all spacetimes with
conformally-related metrics. This provides a sense in which electromagnetism
alone cannot be used to measure certain aspects of geometry. We show that there
is actually much more... | [
{
"created": "Wed, 18 Jan 2017 23:25:14 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Apr 2017 10:04:34 GMT",
"version": "v2"
}
] | 2017-04-13 | [
[
"Harte",
"Abraham I.",
""
]
] | Electromagnetic fields which solve the vacuum Maxwell equations in one spacetime are well-known to also be solutions in all spacetimes with conformally-related metrics. This provides a sense in which electromagnetism alone cannot be used to measure certain aspects of geometry. We show that there is actually much more w... |
gr-qc/9905098 | Claus Kiefer | A. Barvinsky, A. Kamenshchik, C. Kiefer | Origin of the inflationary Universe | LATEX, 6 pages, selected for honorable mention in the 1999 Essay
Competition of the Gravity Research Foundation. To appear in Mod. Phys. Lett.
A | Mod.Phys.Lett. A14 (1999) 1083 | 10.1142/S0217732399001164 | Freiburg THEP-99/6 | gr-qc | null | We give a consistent description of how the inflationary Universe emerges in
quantum cosmology. This involves two steps: Firstly, it is shown that a
sensible probability peak can be obtained from the cosmological wave function.
This is achieved by going beyond the tree level of the semiclassical expansion.
Secondly, ... | [
{
"created": "Thu, 27 May 1999 12:29:17 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Barvinsky",
"A.",
""
],
[
"Kamenshchik",
"A.",
""
],
[
"Kiefer",
"C.",
""
]
] | We give a consistent description of how the inflationary Universe emerges in quantum cosmology. This involves two steps: Firstly, it is shown that a sensible probability peak can be obtained from the cosmological wave function. This is achieved by going beyond the tree level of the semiclassical expansion. Secondly, du... |
2004.12549 | Andreas Doll | Antonio De Felice, Andreas Doll, Shinji Mukohyama | A theory of type-II minimally modified gravity | 18 pages | JCAP09(2020)034 | 10.1088/1475-7516/2020/09/034 | YITP-20-55, IPMU20-0040 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a modified gravity theory that propagates only two local
gravitational degrees of freedom and that does not have an Einstein frame.
According to the classification in JCAP 01 (2019) 017 [arXiv:1810.01047
[gr-qc]], this is a type-II minimally modified gravity theory. The theory is
characterized by the gravi... | [
{
"created": "Mon, 27 Apr 2020 02:27:05 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Sep 2020 16:13:19 GMT",
"version": "v2"
}
] | 2020-09-17 | [
[
"De Felice",
"Antonio",
""
],
[
"Doll",
"Andreas",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | We propose a modified gravity theory that propagates only two local gravitational degrees of freedom and that does not have an Einstein frame. According to the classification in JCAP 01 (2019) 017 [arXiv:1810.01047 [gr-qc]], this is a type-II minimally modified gravity theory. The theory is characterized by the gravita... |
1912.05314 | Astrid Eichhorn | Astrid Eichhorn, Johannes Lumma, Antonio D. Pereira, Arslan Sikandar | Universal critical behavior in tensor models for four-dimensional
quantum gravity | 10 pages | null | 10.1007/JHEP02(2020)110 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Four-dimensional random geometries can be generated by statistical models
with rank-4 tensors as random variables. These are dual to discrete building
blocks of random geometries. We discover a potential candidate for a continuum
limit in such a model by employing background-independent coarse-graining
techniques whe... | [
{
"created": "Wed, 11 Dec 2019 13:55:01 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Lumma",
"Johannes",
""
],
[
"Pereira",
"Antonio D.",
""
],
[
"Sikandar",
"Arslan",
""
]
] | Four-dimensional random geometries can be generated by statistical models with rank-4 tensors as random variables. These are dual to discrete building blocks of random geometries. We discover a potential candidate for a continuum limit in such a model by employing background-independent coarse-graining techniques where... |
gr-qc/0402103 | Stephane Fay | Stephane Fay | Scalar fields properties for flat galactic rotation curves | 10 pages | Astron.Astrophys.413:799,2004; Astron.Astrophys.413:799-805,2004 | 10.1051/0004-6361:20031540 | null | gr-qc astro-ph | null | The whole class of minimally coupled and massive scalar fields which may be
responsible for flattening of galactic rotation curves is found. An interesting
relation with a class of scalar-tensor theories able to isotropise anisotropic
models of Universe is shown. The resulting metric is found and its stability
and sc... | [
{
"created": "Tue, 24 Feb 2004 14:34:12 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Fay",
"Stephane",
""
]
] | The whole class of minimally coupled and massive scalar fields which may be responsible for flattening of galactic rotation curves is found. An interesting relation with a class of scalar-tensor theories able to isotropise anisotropic models of Universe is shown. The resulting metric is found and its stability and scal... |
gr-qc/0409105 | Matteo Luca Ruggiero | Guido Rizzi, Matteo Luca Ruggiero, Alessio Serafini | Synchronization Gauges and the Principles of Special Relativity | 56 pages, 3 eps figures, invited paper; to appear in Foundations of
Physics (Special Issue to honor Prof. Franco Selleri on his 70th birthday) | Found.Phys. 34 (2005) 1835-1887 | 10.1007/s10701-004-1624-3 | null | gr-qc | null | The axiomatic bases of Special Relativity Theory (SRT) are thoroughly
re-examined from an operational point of view, with particular emphasis on the
status of Einstein synchronization in the light of the possibility of arbitrary
synchronization procedures in inertial reference frames. Once correctly and
explicitly ph... | [
{
"created": "Tue, 28 Sep 2004 10:25:49 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Oct 2004 12:31:56 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Rizzi",
"Guido",
""
],
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Serafini",
"Alessio",
""
]
] | The axiomatic bases of Special Relativity Theory (SRT) are thoroughly re-examined from an operational point of view, with particular emphasis on the status of Einstein synchronization in the light of the possibility of arbitrary synchronization procedures in inertial reference frames. Once correctly and explicitly phra... |
1411.5454 | Kokubu Takafumi | Takafumi Kokubu and Tomohiro Harada | Negative tension branes as stable thin shell wormholes | 24pages, 6 figures | Class.Quant.Grav. 32 (2015) 20, 205001 | 10.1088/0264-9381/32/20/205001 | RUP-14-17 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate negative tension branes as stable thin shell wormholes in
Reissner-Nordstrom-(anti) de Sitter spacetimes in $d$ dimensional Einstein
gravity. Imposing Z2 symmetry, we construct and classify traversable static
thin shell wormholes in spherical, planar (or cylindrical) and hyperbolic
symmetries. In spher... | [
{
"created": "Thu, 20 Nov 2014 06:46:17 GMT",
"version": "v1"
}
] | 2015-12-29 | [
[
"Kokubu",
"Takafumi",
""
],
[
"Harada",
"Tomohiro",
""
]
] | We investigate negative tension branes as stable thin shell wormholes in Reissner-Nordstrom-(anti) de Sitter spacetimes in $d$ dimensional Einstein gravity. Imposing Z2 symmetry, we construct and classify traversable static thin shell wormholes in spherical, planar (or cylindrical) and hyperbolic symmetries. In spheric... |
0901.0394 | Alan Coley | A. Coley, S. Hervik, G. Papadopoulos, N. Pelavas | Kundt Spacetimes | 40 pages. to appear CQG | Class.Quant.Grav.26:105016,2009 | 10.1088/0264-9381/26/10/105016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kundt spacetimes are of great importance in general relativity in 4
dimensions and have a number of topical applications in higher dimensions in
the context of string theory. The degenerate Kundt spacetimes have many special
and unique mathematical properties, including their invariant curvature
structure and their h... | [
{
"created": "Sun, 4 Jan 2009 19:29:38 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Mar 2009 22:40:43 GMT",
"version": "v2"
}
] | 2009-10-09 | [
[
"Coley",
"A.",
""
],
[
"Hervik",
"S.",
""
],
[
"Papadopoulos",
"G.",
""
],
[
"Pelavas",
"N.",
""
]
] | Kundt spacetimes are of great importance in general relativity in 4 dimensions and have a number of topical applications in higher dimensions in the context of string theory. The degenerate Kundt spacetimes have many special and unique mathematical properties, including their invariant curvature structure and their hol... |
2012.11545 | Vladimir O. Soloviev | Vladimir O. Soloviev | The Canonical Structure of Bigravity | 11 pages, 1 table, based on a talk given at the Fourth Zeldovich
meeting, an international conference in honor of Ya. B. Zeldovich held in
Minsk, Belarus on September 7--11, 2020 | null | 10.1134/S1063772921100383 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is motivated by an intention to make the theory of bigravity more
comprehensible. Bigravity is a modification of the General Relativity (GR),
maybe even the most natural one because it is based on the equivalence
principle. The Hamiltonian formalism in tetrad variables transparently
demonstrates the structu... | [
{
"created": "Mon, 21 Dec 2020 18:27:41 GMT",
"version": "v1"
}
] | 2021-11-03 | [
[
"Soloviev",
"Vladimir O.",
""
]
] | This work is motivated by an intention to make the theory of bigravity more comprehensible. Bigravity is a modification of the General Relativity (GR), maybe even the most natural one because it is based on the equivalence principle. The Hamiltonian formalism in tetrad variables transparently demonstrates the structure... |
2002.01341 | Kimet Jusufi | Kimet Jusufi, Phongpichit Channuie, Mubasher Jamil | Traversable Wormholes Supported by GUP Corrected Casimir Energy | 14 pages, 18 figures. Accepted for publication in EPJC. arXiv admin
note: text overlap with arXiv:1112.2924 by other authors | Eur. Phys. J. C 80, 127 (2020) | 10.1140/epjc/s10052-020-7690-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the effect of the Generalized Uncertainty
Principle (GUP) in the Casimir wormhole spacetime recently proposed by
Garattini [Eur. Phys. J. C (2019) 79: 951]. In particular, we consider three
types of the GUP relations, firstly the Kempf, Mangano and Mann (KMM) model,
secondly the Detourna... | [
{
"created": "Mon, 3 Feb 2020 11:43:52 GMT",
"version": "v1"
}
] | 2020-02-18 | [
[
"Jusufi",
"Kimet",
""
],
[
"Channuie",
"Phongpichit",
""
],
[
"Jamil",
"Mubasher",
""
]
] | In this paper, we investigate the effect of the Generalized Uncertainty Principle (GUP) in the Casimir wormhole spacetime recently proposed by Garattini [Eur. Phys. J. C (2019) 79: 951]. In particular, we consider three types of the GUP relations, firstly the Kempf, Mangano and Mann (KMM) model, secondly the Detournay,... |
gr-qc/9705050 | Dharam V. Ahluwalia | D. V. Ahluwalia (Los Alamos, and ANSER, Inc.) | On a New Non-Geometric Element in Gravity | 1997 Gravity Research Foundation Essay (Fourth Prize), 11 pages | Gen.Rel.Grav.29:1491-1501,1997 | 10.1023/A:1018874111373 | LA-UR-97-864 | gr-qc quant-ph | null | In this essay a generalized notion of flavor-oscillation clocks is
introduced. The generalization contains the element that various superimposed
mass eigenstates may have different relative orientation of the component of
their spin with respect to the rotational axis of the the gravitational source.
It is found that... | [
{
"created": "Tue, 20 May 1997 19:20:45 GMT",
"version": "v1"
},
{
"created": "Wed, 21 May 1997 01:18:55 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ahluwalia",
"D. V.",
"",
"Los Alamos, and ANSER, Inc."
]
] | In this essay a generalized notion of flavor-oscillation clocks is introduced. The generalization contains the element that various superimposed mass eigenstates may have different relative orientation of the component of their spin with respect to the rotational axis of the the gravitational source. It is found that t... |
2110.06247 | Harkirat Singh Sahota | Harkirat Singh Sahota and Kinjalk Lochan | Infrared signatures of quantum bounce in a minisuperspace analysis of
Lema\^{\i}tre-Tolman-Bondi dust collapse | 21 pages, 5 figures, Version published in Phys. Rev. D | Phys. Rev. D 104, 126027 (2021) | 10.1103/PhysRevD.104.126027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the quantum treatment of collapsing matter, a viable mode analysis is
supposed to give information regarding emission during the collapse.
Nevertheless, partly owing to operator ordering ambiguities involved in a
typical quantum gravity analysis, the availability of such well-defined modes
is not guaranteed. We st... | [
{
"created": "Tue, 12 Oct 2021 18:03:12 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Dec 2021 10:20:39 GMT",
"version": "v2"
}
] | 2021-12-30 | [
[
"Sahota",
"Harkirat Singh",
""
],
[
"Lochan",
"Kinjalk",
""
]
] | In the quantum treatment of collapsing matter, a viable mode analysis is supposed to give information regarding emission during the collapse. Nevertheless, partly owing to operator ordering ambiguities involved in a typical quantum gravity analysis, the availability of such well-defined modes is not guaranteed. We stud... |
2108.04234 | Debashis Gangopadhyay | Somnath Mukherjee, Debashis Gangopadhyay | An accelerated universe with negative equation of state parameter in
Inhomogeneous Cosmology with $k$-essence scalar field | 7 pages, latex. arXiv admin note: substantial text overlap with
arXiv:1602.01289 | Physics of The Dark Universe, Volume 32, May 2021, 100800 | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We obtain a scaling relation for spherically symmetric k-essence scalar
fields $\phi(r,t)$ for an inhomogeneous cosmology with the Lemaitre-Tolman-
Bondi (LTB) metric. We show that this scaling relation reduces to the known
relation for a homogeneous cosmology when the LTB metric reduces to the
Friedmann-Lemaitre-Rob... | [
{
"created": "Sun, 8 Aug 2021 05:56:23 GMT",
"version": "v1"
}
] | 2021-08-21 | [
[
"Mukherjee",
"Somnath",
""
],
[
"Gangopadhyay",
"Debashis",
""
]
] | We obtain a scaling relation for spherically symmetric k-essence scalar fields $\phi(r,t)$ for an inhomogeneous cosmology with the Lemaitre-Tolman- Bondi (LTB) metric. We show that this scaling relation reduces to the known relation for a homogeneous cosmology when the LTB metric reduces to the Friedmann-Lemaitre-Rober... |
gr-qc/0508057 | Oleg Zaslavskii | O.B.Zaslavskii | Exactly solvable model of wormhole supported by phantom energy | 6 pages. Two references added, typos corrected. Accepted for
publication in Phys. Rev. D as Rapid Communication | Phys.Rev. D72 (2005) 061303 | 10.1103/PhysRevD.72.061303 | null | gr-qc astro-ph hep-th | null | We have found a simple exact solution of spherically-symmetrical Einstein
equations describing a wormhole for an inhomogeneous distribution of the
phantom energy. The equation of state is linear but highly anisotropic: while
the radial pressure is negative, the transversal one is positive. At infinity
the spacetime i... | [
{
"created": "Sat, 13 Aug 2005 08:18:35 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Sep 2005 17:22:03 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We have found a simple exact solution of spherically-symmetrical Einstein equations describing a wormhole for an inhomogeneous distribution of the phantom energy. The equation of state is linear but highly anisotropic: while the radial pressure is negative, the transversal one is positive. At infinity the spacetime is ... |
0709.0532 | Vitor Cardoso | Vitor Cardoso, Paolo Pani, Mariano Cadoni, Marco Cavaglia | Ergoregion instability of ultra-compact astrophysical objects | 14 pages, 8 Figures, 6 Tables. RevTeX4. v2: Shortened version,
published on PRD, focused on gravastars and boson stars. Sections on
wormholes and superspinars will appear elsewhere | Phys.Rev.D77:124044,2008 | 10.1103/PhysRevD.77.124044 | null | gr-qc astro-ph hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most of the properties of black holes can be mimicked by horizonless compact
objects such as gravastars and boson stars. We show that these ultra-compact
objects develop a strong ergoregion instability when rapidly spinning.
Instability timescales can be of the order of 0.1 seconds to 1 week for objects
with mass M=1... | [
{
"created": "Tue, 4 Sep 2007 20:25:29 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Jul 2008 20:28:11 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Cardoso",
"Vitor",
""
],
[
"Pani",
"Paolo",
""
],
[
"Cadoni",
"Mariano",
""
],
[
"Cavaglia",
"Marco",
""
]
] | Most of the properties of black holes can be mimicked by horizonless compact objects such as gravastars and boson stars. We show that these ultra-compact objects develop a strong ergoregion instability when rapidly spinning. Instability timescales can be of the order of 0.1 seconds to 1 week for objects with mass M=1-1... |
2305.10943 | Dnyaneshwar Tadas | S. P. Hatkar, D. P. Tadas, S. D. Katore | Non-interacting String and Holographic Dark Energy Cosmological Models
in f(R) Theory of Gravitation | 15 Pages, 07 Figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, a new class of string and holographic dark energy (HDE)
cosmological model in the context of f(R) theory of gravity using the Kasner
metric is considered. The exact solution of filed equations are obtained by
using the relation between average scale factor and the scalar function f(R).
It is observed t... | [
{
"created": "Thu, 18 May 2023 13:01:17 GMT",
"version": "v1"
}
] | 2023-05-19 | [
[
"Hatkar",
"S. P.",
""
],
[
"Tadas",
"D. P.",
""
],
[
"Katore",
"S. D.",
""
]
] | In this paper, a new class of string and holographic dark energy (HDE) cosmological model in the context of f(R) theory of gravity using the Kasner metric is considered. The exact solution of filed equations are obtained by using the relation between average scale factor and the scalar function f(R). It is observed tha... |
2112.09950 | Juan M. Z\'arate Pretel | Jos\'e C. Jim\'enez, Juan M. Z. Pretel, Eduardo S. Fraga, Sergio E.
Jor\'as and Ribamar R. R. Reis | $R^2$-gravity quark stars from perturbative QCD | Accepted for publication in JCAP; 17 pages, 5 figures and minor
clarifications added | JCAP 07 (2022) 017 | 10.1088/1475-7516/2022/07/017 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the structure of quark stars in the framework of $f(R)= R+
\alpha R^2$ gravity using an equation of state for cold quark matter obtained
from perturbative QCD, parametrized only by the renormalization scale. We show
that a considerably large range of the free parameter $\alpha$, within and even
beyond ... | [
{
"created": "Sat, 18 Dec 2021 15:05:50 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jan 2022 16:47:48 GMT",
"version": "v2"
},
{
"created": "Tue, 24 May 2022 14:49:40 GMT",
"version": "v3"
}
] | 2022-07-12 | [
[
"Jiménez",
"José C.",
""
],
[
"Pretel",
"Juan M. Z.",
""
],
[
"Fraga",
"Eduardo S.",
""
],
[
"Jorás",
"Sergio E.",
""
],
[
"Reis",
"Ribamar R. R.",
""
]
] | We investigate the structure of quark stars in the framework of $f(R)= R+ \alpha R^2$ gravity using an equation of state for cold quark matter obtained from perturbative QCD, parametrized only by the renormalization scale. We show that a considerably large range of the free parameter $\alpha$, within and even beyond th... |
1202.6015 | Stefano Finazzi | Stefano Finazzi and Renaud Parentani | Hawking radiation in dispersive theories, the two regimes | 11 pages, 9 figures | Phys. Rev. D 85, 124027 (2012) | 10.1103/PhysRevD.85.124027 | null | gr-qc cond-mat.quant-gas hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the black hole radiation spectrum in the presence of
high-frequency dispersion in a large set of situations. In all cases, the
spectrum diverges like the inverse of the Killing frequency. When studying the
low-frequency spectrum, we find only two regimes: an adiabatic one where the
corrections with respect... | [
{
"created": "Mon, 27 Feb 2012 18:17:50 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jun 2012 15:10:06 GMT",
"version": "v2"
}
] | 2012-06-15 | [
[
"Finazzi",
"Stefano",
""
],
[
"Parentani",
"Renaud",
""
]
] | We compute the black hole radiation spectrum in the presence of high-frequency dispersion in a large set of situations. In all cases, the spectrum diverges like the inverse of the Killing frequency. When studying the low-frequency spectrum, we find only two regimes: an adiabatic one where the corrections with respect t... |
gr-qc/0602023 | Lev Prokhorov | Lev V. Prokhorov | Quantum mechanics and the cosmological constant | 9 pages; minor corrections | null | null | null | gr-qc hep-th quant-ph | null | It is shown that in the model [3,4] of quantum mechanics besides probability
amplitudes, the Planck constant and the Fock space, the cosmological constant
also appear in the natural way. The Poisson brackets are generalized for the
case of kinetics.
| [
{
"created": "Tue, 7 Feb 2006 09:22:19 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Feb 2006 18:40:04 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Prokhorov",
"Lev V.",
""
]
] | It is shown that in the model [3,4] of quantum mechanics besides probability amplitudes, the Planck constant and the Fock space, the cosmological constant also appear in the natural way. The Poisson brackets are generalized for the case of kinetics. |
gr-qc/9603007 | Vladimir Dzhunushaliev | V. D. Dzhunushaliev | 5D Kaluza - Klein's Wormhole Between Two Event Horizons | REVTEX, 3 pages | null | null | null | gr-qc hep-th | null | The solution of the 5D Kaluza-Klein's theory is obtained. This solution is a
Lorentzian wormhole between two event horizons. It is shown that this solution
can sew with (4D Reissner-Nordstr\"om's solution + Maxwell's electrical field)
on the event horizon. Such construction is composite wormhole connecting two
asympt... | [
{
"created": "Thu, 7 Mar 1996 04:42:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dzhunushaliev",
"V. D.",
""
]
] | The solution of the 5D Kaluza-Klein's theory is obtained. This solution is a Lorentzian wormhole between two event horizons. It is shown that this solution can sew with (4D Reissner-Nordstr\"om's solution + Maxwell's electrical field) on the event horizon. Such construction is composite wormhole connecting two asymptot... |
2006.04272 | Deborah Ferguson | Deborah Ferguson, Karan Jani, Pablo Laguna, and Deirdre Shoemaker | Assessing the Readiness of Numerical Relativity for LISA and 3G
Detectors | 7 pages, 5 figures | Phys. Rev. D 104, 044037 (2021) | 10.1103/PhysRevD.104.044037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Future detectors such as LISA promise signal-to-noise ratios potentially in
the thousands and data containing simultaneous signals. Accurate numerical
relativity waveforms will be essential to maximize the science return. A
question of interest to the broad gravitational wave community is: Are the
numerical relativit... | [
{
"created": "Sun, 7 Jun 2020 21:32:18 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jul 2021 18:57:16 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Dec 2021 22:35:14 GMT",
"version": "v3"
}
] | 2021-12-10 | [
[
"Ferguson",
"Deborah",
""
],
[
"Jani",
"Karan",
""
],
[
"Laguna",
"Pablo",
""
],
[
"Shoemaker",
"Deirdre",
""
]
] | Future detectors such as LISA promise signal-to-noise ratios potentially in the thousands and data containing simultaneous signals. Accurate numerical relativity waveforms will be essential to maximize the science return. A question of interest to the broad gravitational wave community is: Are the numerical relativity ... |
1812.01909 | Roderich Tumulka | Roderich Tumulka | The Problem of Boltzmann Brains and How Bohmian Mechanics Helps Solve It | 7 pages, 2 figures (1 figure file). Written for the Proceedings of
the 15th Marcel Grossmann Meeting on General Relativity (Rome 2018), edited
by E. Battistelli, R.T. Jantzen, and R. Ruffini | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most versions of classical physics imply that if the 4-volume of the entire
space-time is infinite or at least extremely large, then random fluctuations in
the matter will by coincidence create copies of us in remote places, so called
"Boltzmann brains." That is a problem because it leads to the wrong prediction
that... | [
{
"created": "Wed, 5 Dec 2018 10:46:57 GMT",
"version": "v1"
}
] | 2018-12-06 | [
[
"Tumulka",
"Roderich",
""
]
] | Most versions of classical physics imply that if the 4-volume of the entire space-time is infinite or at least extremely large, then random fluctuations in the matter will by coincidence create copies of us in remote places, so called "Boltzmann brains." That is a problem because it leads to the wrong prediction that _... |
0911.3519 | Alberto Rozas-Fernandez | Alberto Rozas-Fernandez | Holographic dilatonic model of dark energy | 7 pages, 3 figures, changed content, added references, accepted for
publication at Eur.Phys.J.C | Eur.Phys.J.C71:1536,2011 | 10.1140/epjc/s10052-010-1536-7 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a dilatonic description of the holographic dark energy by
connecting the holographic dark energy density with the dilaton scalar field
energy density in a flat Friedmann-Robertson-Walker universe. We show that this
model can describe the observed accelerated expansion of our universe with the
choice $c\geq... | [
{
"created": "Wed, 18 Nov 2009 12:29:39 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Nov 2010 16:31:27 GMT",
"version": "v2"
}
] | 2011-03-03 | [
[
"Rozas-Fernandez",
"Alberto",
""
]
] | We present a dilatonic description of the holographic dark energy by connecting the holographic dark energy density with the dilaton scalar field energy density in a flat Friedmann-Robertson-Walker universe. We show that this model can describe the observed accelerated expansion of our universe with the choice $c\geq1$... |
gr-qc/0208046 | Craig B. Markwardt | Craig B. Markwardt | Independent Confirmation of the Pioneer 10 Anomalous Acceleration | RevTeX, 29 pages, 5 figures, submitted to Phys Rev D | null | null | null | gr-qc astro-ph | null | I perform an independent analysis of radio Doppler tracking data from the
Pioneer 10 spacecraft for the time period 1987-1994. All of the tracking data
were taken from public archive sources, and the analysis tools were developed
independently by myself. I confirm that an apparent anomalous acceleration is
acting on ... | [
{
"created": "Fri, 16 Aug 2002 21:41:28 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Markwardt",
"Craig B.",
""
]
] | I perform an independent analysis of radio Doppler tracking data from the Pioneer 10 spacecraft for the time period 1987-1994. All of the tracking data were taken from public archive sources, and the analysis tools were developed independently by myself. I confirm that an apparent anomalous acceleration is acting on th... |
1707.02720 | Chopin Soo | Eyo Eyo Ita III, Chopin Soo, Hoi-Lai Yu | Intrinsic time gravity, heat kernel regularization, and emergence of
Einstein's theory | 8 pages; replaced with published version | Class. Quantum Grav. 38 035007 (2021) | 10.1088/1361-6382/abcb0e | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian of Intrinsic Time Gravity is elucidated. The theory describes
Schrodinger evolution of our universe with respect to the fractional change of
the total spatial volume. Gravitational interactions are introduced by
extending Klauder's momentric variable with similarity transformations, and
explicit spati... | [
{
"created": "Mon, 10 Jul 2017 07:13:51 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Nov 2017 06:34:04 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Sep 2020 09:11:39 GMT",
"version": "v3"
},
{
"created": "Mon, 11 Jan 2021 00:18:44 GMT",
"version": "v4"
}
] | 2021-01-12 | [
[
"Ita",
"Eyo Eyo",
"III"
],
[
"Soo",
"Chopin",
""
],
[
"Yu",
"Hoi-Lai",
""
]
] | The Hamiltonian of Intrinsic Time Gravity is elucidated. The theory describes Schrodinger evolution of our universe with respect to the fractional change of the total spatial volume. Gravitational interactions are introduced by extending Klauder's momentric variable with similarity transformations, and explicit spatial... |
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