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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1406.7153 | Xu Wei | Wei Xu, Liu Zhao and De-Cheng Zou | Three dimensional rotating hairy black holes, asymptotics and
thermodynamics | 13 pages, 2 figures. arXiv admin note: text overlap with
arXiv:1211.4878 by other authors | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A rotating hairy black hole solution is found in gravity minimally coupled to
a self-interacting real scalar field in three spacetime dimensions. Then we
discuss analytically the horizon structure and find an analogue of the famous
Kerr bound in (2+1) dimensions because of the existence of black hole horizons.
We pre... | [
{
"created": "Fri, 27 Jun 2014 11:30:13 GMT",
"version": "v1"
}
] | 2014-06-30 | [
[
"Xu",
"Wei",
""
],
[
"Zhao",
"Liu",
""
],
[
"Zou",
"De-Cheng",
""
]
] | A rotating hairy black hole solution is found in gravity minimally coupled to a self-interacting real scalar field in three spacetime dimensions. Then we discuss analytically the horizon structure and find an analogue of the famous Kerr bound in (2+1) dimensions because of the existence of black hole horizons. We prese... |
gr-qc/0506122 | Hyeong-Chan Kim | Hyeong-Chan Kim, Jae Hyung Yee, and Chaiho Rim | Density fluctuations in $\kappa$-deformed inflationary universe | final revision; 19 pages, 3 figures; to appear in Phys. Rev. D | Phys.Rev. D72 (2005) 103523 | 10.1103/PhysRevD.72.103523 | null | gr-qc astro-ph hep-th | null | We study the spectrum of metric fluctuation in $\kappa$-deformed inflationary
universe. We write the theory of scalar metric fluctuations in the
$\kappa-$deformed Robertson-Walker space, which is represented as a non-local
theory in the conventional Robertson-Walker space. One important consequence of
the deformation... | [
{
"created": "Mon, 27 Jun 2005 03:03:18 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2005 10:20:20 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Oct 2005 02:48:04 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Kim",
"Hyeong-Chan",
""
],
[
"Yee",
"Jae Hyung",
""
],
[
"Rim",
"Chaiho",
""
]
] | We study the spectrum of metric fluctuation in $\kappa$-deformed inflationary universe. We write the theory of scalar metric fluctuations in the $\kappa-$deformed Robertson-Walker space, which is represented as a non-local theory in the conventional Robertson-Walker space. One important consequence of the deformation i... |
1309.1606 | Cosimo Bambi | Zilong Li, Cosimo Bambi | Measuring the Kerr spin parameter of regular black holes from their
shadow | 1+18 pages, 8 figures. v2: refereed version. arXiv admin note: text
overlap with arXiv:1305.5409 | JCAP 1401:041,2014 | 10.1088/1475-7516/2014/01/041 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous paper, one of us has showed that, at least in some cases, the
Kerr-nature of astrophysical black hole candidates is extremely difficult to
test and current techniques, even in presence of excellent data not available
today, cannot distinguish a Kerr black hole from a Bardeen one, despite the
substantial... | [
{
"created": "Fri, 6 Sep 2013 11:29:31 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jan 2014 19:39:49 GMT",
"version": "v2"
}
] | 2014-01-28 | [
[
"Li",
"Zilong",
""
],
[
"Bambi",
"Cosimo",
""
]
] | In a previous paper, one of us has showed that, at least in some cases, the Kerr-nature of astrophysical black hole candidates is extremely difficult to test and current techniques, even in presence of excellent data not available today, cannot distinguish a Kerr black hole from a Bardeen one, despite the substantial d... |
gr-qc/0511006 | Donald Neville | Donald E. Neville (Temple University) | The volume operator for singly polarized gravity waves with planar or
cylindrical symmetry | Expanded discussion of outlook for future research, in last three
paragraphs. Corrected the typo in eq. (3). 12 pages | Phys.Rev. D73 (2006) 124005 | 10.1103/PhysRevD.73.124005 | null | gr-qc | null | A previous paper constructed a kinematic basis for spin networks with planar
or cylindrical symmetry and arbitrary polarization. This paper imposes a
constraint which limits the gravitational wave to a single polarization. The
spectrum of the constraint contains a physically reasonable number of zero
eigenvalues, and... | [
{
"created": "Tue, 1 Nov 2005 20:38:51 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jun 2006 15:14:06 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Neville",
"Donald E.",
"",
"Temple University"
]
] | A previous paper constructed a kinematic basis for spin networks with planar or cylindrical symmetry and arbitrary polarization. This paper imposes a constraint which limits the gravitational wave to a single polarization. The spectrum of the constraint contains a physically reasonable number of zero eigenvalues, and t... |
2009.05860 | Valentin Rudenko | V. Rudenko, S. Andrusenko, D. Krichevskiy, G. Manucharyan | Interferometer Euro-Asian Network: Detection Characteristics for Signals
of Known Shape | 19 pages, 7 figures | Universe 2020, 6(9), 140; | 10.3390/universe6090140 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we estimate efficiency of a conceivable Euro-Asian network of
gravitational wave (GW) interferometers that might be realized having in mind a
plan of construction of third generation interferometer in Novosibirsk region.
Subsequently, some network would be composed, including four GW detectors.
Among t... | [
{
"created": "Sat, 12 Sep 2020 20:16:58 GMT",
"version": "v1"
}
] | 2020-09-15 | [
[
"Rudenko",
"V.",
""
],
[
"Andrusenko",
"S.",
""
],
[
"Krichevskiy",
"D.",
""
],
[
"Manucharyan",
"G.",
""
]
] | In this paper, we estimate efficiency of a conceivable Euro-Asian network of gravitational wave (GW) interferometers that might be realized having in mind a plan of construction of third generation interferometer in Novosibirsk region. Subsequently, some network would be composed, including four GW detectors. Among the... |
0906.4529 | J. Fernando Barbero G. | Ivan Agullo, J. Fernando Barbero G., Enrique F. Borja, Jacobo
Diaz-Polo, Eduardo J. S. Villase\~nor | The combinatorics of the SU(2) black hole entropy in loop quantum
gravity | 5 pages. Accepted for publication in Physical Review D | Phys.Rev.D80:084006,2009 | 10.1103/PhysRevD.80.084006 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the combinatorial and number-theoretical methods developed in previous
work by the authors to study black hole entropy in the new proposal put forward
by Engle, Noui and Perez. Specifically we give the generating functions
relevant for the computation of the entropy and use them to derive its
asymptotic behavi... | [
{
"created": "Wed, 24 Jun 2009 17:47:54 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jun 2009 21:38:02 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Sep 2009 08:46:18 GMT",
"version": "v3"
}
] | 2009-10-07 | [
[
"Agullo",
"Ivan",
""
],
[
"G.",
"J. Fernando Barbero",
""
],
[
"Borja",
"Enrique F.",
""
],
[
"Diaz-Polo",
"Jacobo",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We use the combinatorial and number-theoretical methods developed in previous work by the authors to study black hole entropy in the new proposal put forward by Engle, Noui and Perez. Specifically we give the generating functions relevant for the computation of the entropy and use them to derive its asymptotic behavior... |
gr-qc/9601013 | Merced Montesinos | M. Montesinos-Velasquez and T. Matos | From vacuum field equations on principal bundles to Einstein equations
with fluids | 7 pages, Latex, 0 figures | Rev. Mex. Fis. 41 (1995) 791 | null | null | gr-qc | null | In the present work we show that the Einstein equations on $M$ without
cosmological constant and with perfect fluid as source, can be obtained from
the field equations for vacuum with cosmological constant on the principal
fibre bundle $P(\frac{1}{I} M,U(1))$, $M$ being the space-time and $I$ the
radius of the intern... | [
{
"created": "Wed, 10 Jan 1996 00:12:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Montesinos-Velasquez",
"M.",
""
],
[
"Matos",
"T.",
""
]
] | In the present work we show that the Einstein equations on $M$ without cosmological constant and with perfect fluid as source, can be obtained from the field equations for vacuum with cosmological constant on the principal fibre bundle $P(\frac{1}{I} M,U(1))$, $M$ being the space-time and $I$ the radius of the internal... |
2011.01517 | Leandros Perivolaropoulos | Radouane Gannouji, Leandros Perivolaropoulos, David Polarski and
Foteini Skara | Weak gravity on a $\Lambda$CDM background | 14 pages, 2 figures | Phys. Rev. D 103, 063509 (2021) | 10.1103/PhysRevD.103.063509 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Horndeski modified gravity models obeying stability, velocity of
gravitational waves $c_T$ equals $c$ and quasistatic approximation (QSA) on
subhorizon scales. We assume further a $\Lambda$CDM background expansion and a
monotonic evolution on the cosmic background of the $\alpha$ functions as
$\alpha_i= \... | [
{
"created": "Tue, 3 Nov 2020 07:24:30 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Dec 2020 19:26:33 GMT",
"version": "v2"
}
] | 2021-03-17 | [
[
"Gannouji",
"Radouane",
""
],
[
"Perivolaropoulos",
"Leandros",
""
],
[
"Polarski",
"David",
""
],
[
"Skara",
"Foteini",
""
]
] | We consider Horndeski modified gravity models obeying stability, velocity of gravitational waves $c_T$ equals $c$ and quasistatic approximation (QSA) on subhorizon scales. We assume further a $\Lambda$CDM background expansion and a monotonic evolution on the cosmic background of the $\alpha$ functions as $\alpha_i= \al... |
gr-qc/0103113 | Hernando Quevedo | Hernando Quevedo | The Big Bang in $T^3$ Gowdy Cosmological Models | 10 pages, latex, no figures | null | null | null | gr-qc | null | We establish a formal relationship between stationary axisymmetric spacetimes
and $T^3$ Gowdy cosmological models which allows us to derive several
preliminary results about the generation of exact cosmological solutions and
their possible behavior near the initial singularity. In particular, we argue
that it is poss... | [
{
"created": "Fri, 30 Mar 2001 19:49:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Quevedo",
"Hernando",
""
]
] | We establish a formal relationship between stationary axisymmetric spacetimes and $T^3$ Gowdy cosmological models which allows us to derive several preliminary results about the generation of exact cosmological solutions and their possible behavior near the initial singularity. In particular, we argue that it is possib... |
2008.00536 | Juan M. Z\'arate Pretel | Juan M. Z. Pretel, Sergio E. Jor\'as and Ribamar R. R. Reis | Strongest constraint in $f(R) = R+ \alpha R^2$ gravity: stellar
stability | 12 pages, 3 figures | JCAP 11 (2020) 048 | 10.1088/1475-7516/2020/11/048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the metric approach of $f(R)$ theories of gravity, the fourth-order field
equations are often recast as effective Einstein equations in the presence of
standard matter and a curvature fluid (which gathers all the extra terms),
always in the Jordan frame. In this picture, we investigate the strong gravity
regime of... | [
{
"created": "Sun, 2 Aug 2020 18:36:42 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Nov 2020 20:04:02 GMT",
"version": "v2"
}
] | 2020-12-01 | [
[
"Pretel",
"Juan M. Z.",
""
],
[
"Jorás",
"Sergio E.",
""
],
[
"Reis",
"Ribamar R. R.",
""
]
] | In the metric approach of $f(R)$ theories of gravity, the fourth-order field equations are often recast as effective Einstein equations in the presence of standard matter and a curvature fluid (which gathers all the extra terms), always in the Jordan frame. In this picture, we investigate the strong gravity regime of t... |
1607.00996 | Alexander Vikman | Damien A. Easson and Alexander Vikman | The Phantom of the New Oscillatory Cosmological Phase | 15 pages, 3 figures, plus references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a recently proposed new cosmological phase where a scalar field
moves periodically in an expanding spatially-flat Friedmann universe. This
phase corresponds to a limiting cycle of the equations of motion and can be
considered as a cosmological realization of a "time-crystal". We show that this
phase is only ... | [
{
"created": "Mon, 4 Jul 2016 19:15:24 GMT",
"version": "v1"
}
] | 2016-07-05 | [
[
"Easson",
"Damien A.",
""
],
[
"Vikman",
"Alexander",
""
]
] | We study a recently proposed new cosmological phase where a scalar field moves periodically in an expanding spatially-flat Friedmann universe. This phase corresponds to a limiting cycle of the equations of motion and can be considered as a cosmological realization of a "time-crystal". We show that this phase is only po... |
1409.0836 | Simone Speziale | Fabio Anz\`a and Simone Speziale | A note on the secondary simplicity constraints in loop quantum gravity | 20 pages. v2 many improvements: slightly different Hamiltonian, more
details on the canonical analysis and on the extension to arbitrary graphs,
new section added. Main conclusion unchanged, but made more precise | null | 10.1088/0264-9381/32/19/195015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A debate has appeared in the literature on loop quantum gravity and spin
foams, over whether the secondary simplicity constraints, reducing the
connection to be Levi-Civita, should imply the shape matching conditions,
reducing twisted geometries to Regge geometries. We address the question using
a simple model with a... | [
{
"created": "Tue, 2 Sep 2014 19:33:53 GMT",
"version": "v1"
},
{
"created": "Wed, 20 May 2015 14:30:23 GMT",
"version": "v2"
}
] | 2015-09-30 | [
[
"Anzà",
"Fabio",
""
],
[
"Speziale",
"Simone",
""
]
] | A debate has appeared in the literature on loop quantum gravity and spin foams, over whether the secondary simplicity constraints, reducing the connection to be Levi-Civita, should imply the shape matching conditions, reducing twisted geometries to Regge geometries. We address the question using a simple model with a f... |
1906.09519 | Kenji Tomita | Kenji Tomita | Hubble constants and luminosity distance in the renormalized
cosmological models due to general-relativistic second-order perturbations | 16 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Renormalized cosmological models based on the general-relativistic
second-order perturbation theory were proposed in the previous papers to solve
a tension on the observed Hubble constants. The cosmological random adiabatic
fluctuations were found to play an important role as the first-order
perturbations. The second... | [
{
"created": "Sat, 22 Jun 2019 23:09:11 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jan 2020 02:51:32 GMT",
"version": "v2"
}
] | 2020-01-27 | [
[
"Tomita",
"Kenji",
""
]
] | Renormalized cosmological models based on the general-relativistic second-order perturbation theory were proposed in the previous papers to solve a tension on the observed Hubble constants. The cosmological random adiabatic fluctuations were found to play an important role as the first-order perturbations. The second-o... |
2301.02631 | Khaled Saaidi | S. Taghavi, Kh. Saaidi, Z. Ossoulian, T. Golanbari | Holographic inflation in $f(R,T)$ gravity and observational constraints | 11 pages, 7 figures, 2 tables, typos corrected, references added,
submitted version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the possibility of having HDE as the source of inflation in the
frame of $f(R,T)$ gravity theory. The length scale of the energy density is
taken as the GO cutoff, which is a combination of the Hubble parameter and its
time derivative. It is found that for a specific range of the free parameters
of the model... | [
{
"created": "Thu, 5 Jan 2023 07:05:14 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Feb 2023 07:32:04 GMT",
"version": "v2"
},
{
"created": "Sat, 4 Mar 2023 14:32:10 GMT",
"version": "v3"
}
] | 2023-03-07 | [
[
"Taghavi",
"S.",
""
],
[
"Saaidi",
"Kh.",
""
],
[
"Ossoulian",
"Z.",
""
],
[
"Golanbari",
"T.",
""
]
] | We study the possibility of having HDE as the source of inflation in the frame of $f(R,T)$ gravity theory. The length scale of the energy density is taken as the GO cutoff, which is a combination of the Hubble parameter and its time derivative. It is found that for a specific range of the free parameters of the model, ... |
2112.06446 | Tao Zhu | Cheng Gong, Tao Zhu, Rui Niu, Qiang Wu, Jing-Lei Cui, Xin Zhang, Wen
Zhao, and Anzhong Wang | Gravitational wave constraints on Lorentz and parity violations in
gravity: high-order spatial derivative cases | 14 pages, 3 figures, 2 tables. arXiv admin note: text overlap with
arXiv:2110.13870; v2: version to appear in Phys. Rev. D | null | 10.1103/PhysRevD.105.044034 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | High-order spatial derivatives are of crucial importance for constructing the
low energy effective action of a Lorentz or parity violating theory of quantum
gravity. One example is the Ho\v{r}ava-Lifshitz gravity, in one has to consider
at least the sixth-order spatial derivatives in the gravitational action, in
orde... | [
{
"created": "Mon, 13 Dec 2021 07:00:44 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Feb 2022 12:36:12 GMT",
"version": "v2"
}
] | 2022-03-02 | [
[
"Gong",
"Cheng",
""
],
[
"Zhu",
"Tao",
""
],
[
"Niu",
"Rui",
""
],
[
"Wu",
"Qiang",
""
],
[
"Cui",
"Jing-Lei",
""
],
[
"Zhang",
"Xin",
""
],
[
"Zhao",
"Wen",
""
],
[
"Wang",
"Anzhong",
""
... | High-order spatial derivatives are of crucial importance for constructing the low energy effective action of a Lorentz or parity violating theory of quantum gravity. One example is the Ho\v{r}ava-Lifshitz gravity, in one has to consider at least the sixth-order spatial derivatives in the gravitational action, in order ... |
2304.06593 | Orlando Luongo | Orlando Luongo, Stefano Mancini, Paolo Pierosara | Entanglement entropy for spherically symmetric regular black holes | 12 pages, 1 table, 2 figures | Phys. Rev. D 108, 104059, (2023) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bardeen and Hayward spacetimes are here considered as standard
configurations of spherically symmetric regular black holes. Assuming the
thermodynamics of such objects to be analogous to standard black holes, we
compute the island formula in the regime of small topological charge and large
vacuum energy, respecti... | [
{
"created": "Thu, 13 Apr 2023 14:57:55 GMT",
"version": "v1"
},
{
"created": "Fri, 17 May 2024 15:36:40 GMT",
"version": "v2"
}
] | 2024-05-20 | [
[
"Luongo",
"Orlando",
""
],
[
"Mancini",
"Stefano",
""
],
[
"Pierosara",
"Paolo",
""
]
] | The Bardeen and Hayward spacetimes are here considered as standard configurations of spherically symmetric regular black holes. Assuming the thermodynamics of such objects to be analogous to standard black holes, we compute the island formula in the regime of small topological charge and large vacuum energy, respective... |
gr-qc/9401011 | Carlo Rovelli | H A Marales-Tecotl and C Rovelli | Fermions in Quantum Gravity | LaTeX file, 37 pages, no figures | Phys.Rev.Lett. 72 (1994) 3642-3645 | 10.1103/PhysRevLett.72.3642 | null | gr-qc | null | We study the quantum fermions+gravity system, that is, the gravitational
counterpart of QED. We start from the standard Einstein-Weyl theory,
reformulated in terms of Ashtekar variables; and we construct its non-
perturbative quantum theory by extending the loop representation of general
relativity. We construct the ... | [
{
"created": "Thu, 13 Jan 1994 00:06:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Marales-Tecotl",
"H A",
""
],
[
"Rovelli",
"C",
""
]
] | We study the quantum fermions+gravity system, that is, the gravitational counterpart of QED. We start from the standard Einstein-Weyl theory, reformulated in terms of Ashtekar variables; and we construct its non- perturbative quantum theory by extending the loop representation of general relativity. We construct the fe... |
2404.01201 | Slava G. Turyshev | Slava G. Turyshev | Search for gravitationally lensed interstellar transmissions | 13 pages, 3 figures | null | null | null | gr-qc astro-ph.GA astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore interstellar light transmission facilitated by gravitational
lensing, focusing on axially-symmetric lensing configurations where the
transmitter, lens, and receiver are nearly aligned. Positioning an optical
transmitter in the lens's focal region, we investigate the caustic formed by a
diffraction-limited ... | [
{
"created": "Mon, 1 Apr 2024 15:57:57 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Apr 2024 15:55:41 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Apr 2024 04:18:24 GMT",
"version": "v3"
},
{
"created": "Tue, 2 Jul 2024 20:59:22 GMT",
"version": "v4"
}
] | 2024-07-04 | [
[
"Turyshev",
"Slava G.",
""
]
] | We explore interstellar light transmission facilitated by gravitational lensing, focusing on axially-symmetric lensing configurations where the transmitter, lens, and receiver are nearly aligned. Positioning an optical transmitter in the lens's focal region, we investigate the caustic formed by a diffraction-limited an... |
gr-qc/9806104 | Marianne Rooman | M. Lubo, M. Rooman, Ph. Spindel | (2+1) dimensional stars | 26 pages, 3 figures, LaTeX, 6 references added | Phys.Rev. D59 (1999) 044012 | 10.1103/PhysRevD.59.044012 | null | gr-qc | null | We investigate, in the framework of (2+1) dimensional gravity, stationary,
rotationally symmetric gravitational sources of the perfect fluid type,
embedded in a space of arbitrary cosmological constant. We show that the
matching conditions between the interior and exterior geometries imply
restrictions on the physica... | [
{
"created": "Fri, 26 Jun 1998 11:51:50 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 1998 16:16:49 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Lubo",
"M.",
""
],
[
"Rooman",
"M.",
""
],
[
"Spindel",
"Ph.",
""
]
] | We investigate, in the framework of (2+1) dimensional gravity, stationary, rotationally symmetric gravitational sources of the perfect fluid type, embedded in a space of arbitrary cosmological constant. We show that the matching conditions between the interior and exterior geometries imply restrictions on the physical ... |
1402.2387 | Kuniyasu Masashi | Masashi Kuniyasu | A New 2+1 Dimensional Einstein Gravity Solution Coupled to Born-Infeld
Electromagnetic Theory without Cosmological Constan | 3 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new solution of the Einstein-Born-Infeld theory in 2+1 space-time is
derived. A new solution has no horizon there are two singularity. This
space-time has two singular points, however, one of the point at the origin is
not in the physical region. We also investigate the energycondition. Then, weak
energy condition ... | [
{
"created": "Tue, 11 Feb 2014 07:39:10 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Feb 2014 00:00:53 GMT",
"version": "v2"
}
] | 2014-02-14 | [
[
"Kuniyasu",
"Masashi",
""
]
] | A new solution of the Einstein-Born-Infeld theory in 2+1 space-time is derived. A new solution has no horizon there are two singularity. This space-time has two singular points, however, one of the point at the origin is not in the physical region. We also investigate the energycondition. Then, weak energy condition is... |
0901.0215 | Nikodem Poplawski | Nikodem J. Poplawski | The universe as a black hole in isotropic coordinates | 4 pages, REVTeX4 | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the radial geodesic motion of a particle inside a black hole in
isotropic coordinates (the Einstein-Rosen bridge) is physically different from
the radial motion inside a Schwarzschild black hole. A particle enters the
interior region of an Einstein-Rosen black hole which is regular and physically
equival... | [
{
"created": "Fri, 2 Jan 2009 06:01:41 GMT",
"version": "v1"
}
] | 2009-01-21 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | We show that the radial geodesic motion of a particle inside a black hole in isotropic coordinates (the Einstein-Rosen bridge) is physically different from the radial motion inside a Schwarzschild black hole. A particle enters the interior region of an Einstein-Rosen black hole which is regular and physically equivalen... |
2005.09739 | Celia Escamilla-Rivera | Celia Escamilla-Rivera and J\'ulio C. Fabris | The Possibility of a Non-Lagrangian Theory of Gravity | 6 pages, 1 figure. Version accepted in Universe MDPI | Universe 2021, 7(7), 230 | 10.3390/universe7070230 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | General Relativity resembles a very elegant crystal glass: If we touch its
principles, that is, its Lagrangian, there is a risk of breaking everything.
Or, if we will, it is like a short blanket: Curing some problems creates new
problems. This paper is devoted to bring to light the reasons why we pursue the
possibili... | [
{
"created": "Mon, 18 May 2020 03:53:05 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jul 2021 18:10:41 GMT",
"version": "v2"
}
] | 2021-07-22 | [
[
"Escamilla-Rivera",
"Celia",
""
],
[
"Fabris",
"Júlio C.",
""
]
] | General Relativity resembles a very elegant crystal glass: If we touch its principles, that is, its Lagrangian, there is a risk of breaking everything. Or, if we will, it is like a short blanket: Curing some problems creates new problems. This paper is devoted to bring to light the reasons why we pursue the possibility... |
1411.0135 | Matteo Luca Ruggiero | Matteo Luca Ruggiero, Angelo Tartaglia | A Note on the Sagnac Effect for Matter Beams | 5 Pages, REVTeX; revised to match the version accepted for
publication in The European Physical Journal - Plus | Eur. Phys. J. Plus (2015) 130: 90 | 10.1140/epjp/i2015-15090-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Sagnac effect for matter beams, in order to estimate the
kinematic corrections to the basic formula, deriving from the position and the
extent of the interferometer, and discuss the analogy with the Aharonov-Bohm
effect. We show that the formula for the Sagnac time delay is the same for
matter and light ... | [
{
"created": "Sat, 1 Nov 2014 16:40:21 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Apr 2015 14:39:27 GMT",
"version": "v2"
}
] | 2015-05-07 | [
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Tartaglia",
"Angelo",
""
]
] | We study the Sagnac effect for matter beams, in order to estimate the kinematic corrections to the basic formula, deriving from the position and the extent of the interferometer, and discuss the analogy with the Aharonov-Bohm effect. We show that the formula for the Sagnac time delay is the same for matter and light be... |
1512.04824 | Viraj Sanghai | Viraj A. A. Sanghai | Post-Newtonian cosmological models | 4 pages, 1 figure, Contribution to the proceedings of MG14 | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a framework to probe the effect of non-linear structure
formation on the large-scale expansion of the universe. We take a bottom-up
approach to cosmological modelling by splitting our universe into cells. The
matter content within each cell is described by the post-Newtonian formalism.
We assume that mos... | [
{
"created": "Tue, 15 Dec 2015 15:46:18 GMT",
"version": "v1"
}
] | 2015-12-16 | [
[
"Sanghai",
"Viraj A. A.",
""
]
] | We construct a framework to probe the effect of non-linear structure formation on the large-scale expansion of the universe. We take a bottom-up approach to cosmological modelling by splitting our universe into cells. The matter content within each cell is described by the post-Newtonian formalism. We assume that most ... |
1702.06052 | Andre Fuzfa | A. F\"uzfa | Electromagnetic Gravitational Waves Antennas for Directional Emission
and Reception | 35 pages, 16 figures | null | null | Patents PCT/EP2018/086758 ; PCT/EP2018/086760 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A successful experiment combining emission and reception of gravitational
waves (GWs) would constitute a premiere of gravity control. However, such
experiments manipulating gravity would require to compactly store large amounts
of energy while using ultra-sensitive detection techniques and hence can be
expected to be... | [
{
"created": "Mon, 20 Feb 2017 16:28:00 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jan 2018 13:04:51 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Nov 2018 07:48:46 GMT",
"version": "v3"
}
] | 2021-08-24 | [
[
"Füzfa",
"A.",
""
]
] | A successful experiment combining emission and reception of gravitational waves (GWs) would constitute a premiere of gravity control. However, such experiments manipulating gravity would require to compactly store large amounts of energy while using ultra-sensitive detection techniques and hence can be expected to be v... |
1407.7407 | Oliver Rinne | Oliver Rinne | Numerical and analytical methods for asymptotically flat spacetimes | 32 pages, 5 figures | null | null | null | gr-qc math.AP math.NA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article begins with a brief introduction to numerical relativity aimed
at readers who have a background in applied mathematics but not necessarily in
general relativity. I then introduce and summarise my work on the problem of
treating asymptotically flat spacetimes of infinite extent with finite
computational r... | [
{
"created": "Mon, 28 Jul 2014 13:24:55 GMT",
"version": "v1"
}
] | 2014-07-29 | [
[
"Rinne",
"Oliver",
""
]
] | This article begins with a brief introduction to numerical relativity aimed at readers who have a background in applied mathematics but not necessarily in general relativity. I then introduce and summarise my work on the problem of treating asymptotically flat spacetimes of infinite extent with finite computational res... |
1507.06797 | Matteo Luca Ruggiero | Matteo Luca Ruggiero | Gravitomagnetic Field of Rotating Rings | 8 pages, 2 figures; revised to match the version accepted for
publication in Astrophysics and Space Science | Astrophys.Space Sci. 361 (2016) no.4, 140 | 10.1007/s10509-016-2723-2 | null | gr-qc astro-ph.EP astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of the so-called gravitoelectromagnetic formalism, according
to which the equations of the gravitational field can be written in analogy
with classical electromagnetism, we study the gravitomagnetic field of a
rotating ring, orbiting around a central body. We calculate the gravitomagnetic
component o... | [
{
"created": "Fri, 24 Jul 2015 10:15:11 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Aug 2015 14:24:55 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Mar 2016 21:29:10 GMT",
"version": "v3"
}
] | 2016-04-13 | [
[
"Ruggiero",
"Matteo Luca",
""
]
] | In the framework of the so-called gravitoelectromagnetic formalism, according to which the equations of the gravitational field can be written in analogy with classical electromagnetism, we study the gravitomagnetic field of a rotating ring, orbiting around a central body. We calculate the gravitomagnetic component of ... |
gr-qc/9902005 | null | Mustapha Azreg-Ainou | Instability of two-dimensional heterotic stringy black holes | 11 pages, LaTeX | Class.Quant.Grav. 16 (1999) 245-253 | 10.1088/0264-9381/16/1/016 | null | gr-qc | null | We solve the eigenvalue problem of general relativity for the case of charged
black holes in two-dimensional heterotic string theory, derived by McGuigan et
al. For the case of $m^{2}>q^{2}$, we find a physically acceptable
time-dependent growing mode; thus the black hole is unstable. The extremal case
$m^{2}=q^{2}$ ... | [
{
"created": "Mon, 1 Feb 1999 13:08:54 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Azreg-Ainou",
"Mustapha",
""
]
] | We solve the eigenvalue problem of general relativity for the case of charged black holes in two-dimensional heterotic string theory, derived by McGuigan et al. For the case of $m^{2}>q^{2}$, we find a physically acceptable time-dependent growing mode; thus the black hole is unstable. The extremal case $m^{2}=q^{2}$ is... |
gr-qc/0105081 | Roberto A. Sussman | Roberto A. Sussman and Luis Garc\'ia Trujillo | New variables for the Lema\^{\i}tre-Tolman-Bondi dust solutions | 36 pages, 41 graphs grouped into 12 figures. Revtex with BoxedEPSF
macros for embedding figures | Class.Quant.Grav. 19 (2002) 2897-2925 | 10.1088/0264-9381/19/11/310 | null | gr-qc astro-ph | null | We re-examine the Lem\^aitre-Tolman-Bondi (LTB) solutions with a dust source
admitting symmetry centers. We consider as free parameters of the solutions the
initial value functions: $Y_i$, $\rho_i$ and $\Ri$, obtained by restricting the
curvature radius, $Y\equiv \sqrt{g_{\theta\theta}}$, the rest mass density,
$\rho... | [
{
"created": "Wed, 23 May 2001 04:48:05 GMT",
"version": "v1"
}
] | 2016-08-16 | [
[
"Sussman",
"Roberto A.",
""
],
[
"Trujillo",
"Luis García",
""
]
] | We re-examine the Lem\^aitre-Tolman-Bondi (LTB) solutions with a dust source admitting symmetry centers. We consider as free parameters of the solutions the initial value functions: $Y_i$, $\rho_i$ and $\Ri$, obtained by restricting the curvature radius, $Y\equiv \sqrt{g_{\theta\theta}}$, the rest mass density, $\rho$,... |
2301.05205 | Cristian Moreno Pulido | Cristian Moreno-Pulido, Joan Sola Peracaula, Samira Cheraghchi | Running vacuum in QFT in FLRW spacetime: The dynamics of $\rho_{\rm
vac}(H)$ from the quantized matter fields | Matching the published version in EPJC. Work dedicated to Harald
Fritzsch | null | 10.1140/epjc/s10052-023-11772-9 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Phenomenological work in the last few years has provided significant support
to the idea that the vacuum energy density (VED) is a running quantity with the
cosmological evolution and that this running helps to alleviate the
cosmological tensions afflicting the $\Lambda$CDM. On the theoretical side,
recent devoted st... | [
{
"created": "Thu, 12 Jan 2023 18:42:01 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Feb 2023 09:13:09 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Jun 2023 08:07:26 GMT",
"version": "v3"
},
{
"created": "Fri, 21 Jul 2023 08:26:36 GMT",
"version": "v4"
}
] | 2023-07-24 | [
[
"Moreno-Pulido",
"Cristian",
""
],
[
"Peracaula",
"Joan Sola",
""
],
[
"Cheraghchi",
"Samira",
""
]
] | Phenomenological work in the last few years has provided significant support to the idea that the vacuum energy density (VED) is a running quantity with the cosmological evolution and that this running helps to alleviate the cosmological tensions afflicting the $\Lambda$CDM. On the theoretical side, recent devoted stud... |
1805.02824 | Srijita Sinha | Srijita Sinha and Narayan Banerjee | Density perturbation in the models reconstructed from jerk parameter | 14 pages; 3 figures; minor typos corrected; Accepted for publication
in GRG journal | General Relativity and Gravitation 50, 67 2018 | 10.1007/s10714-018-2383-3 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work deals with the late time evolution of the linear density
contrast in the dark energy models reconstructed from the jerk parameter. It is
found that the non-interacting models are favoured compared to the models where
an interaction is allowed in the dark sector.
| [
{
"created": "Tue, 8 May 2018 04:07:32 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2021 04:16:20 GMT",
"version": "v2"
}
] | 2021-03-17 | [
[
"Sinha",
"Srijita",
""
],
[
"Banerjee",
"Narayan",
""
]
] | The present work deals with the late time evolution of the linear density contrast in the dark energy models reconstructed from the jerk parameter. It is found that the non-interacting models are favoured compared to the models where an interaction is allowed in the dark sector. |
gr-qc/9912004 | Walter Landry | Walter Landry and Saul A. Teukolsky | An Efficient Method for Fully Relativistic Simulations of Coalescing
Binary Neutron Stars | 10 pages, 24 figures, fixed some typos, added a paragraph about the
diffusion method and time stepping | null | null | null | gr-qc | null | The merger of two neutron stars has been proposed as a source of gamma-ray
bursts, r-process elements, and detectable gravitational waves. Extracting
information from observations of these phenomena requires fully relativistic
simulations. Unfortunately, the only demonstrated method for stably evolving
neutron stars ... | [
{
"created": "Wed, 1 Dec 1999 12:07:12 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 2000 23:40:33 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Landry",
"Walter",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | The merger of two neutron stars has been proposed as a source of gamma-ray bursts, r-process elements, and detectable gravitational waves. Extracting information from observations of these phenomena requires fully relativistic simulations. Unfortunately, the only demonstrated method for stably evolving neutron stars re... |
1409.6458 | Farid Ya. Khalili | Mikhail Korobko, Nikita Voronchev, Haixing Miao, Farid Ya.Khalili | Paired carriers as a way to reduce quantum noise of multi-carrier
gravitational-wave detectors | null | Phys. Rev. D 91, 042004 (2015) | 10.1103/PhysRevD.91.042004 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore new regimes of laser interferometric gravitational-wave detectors
with multiple optical carriers which allow to reduce the quantum noise of these
detectors. In particular, we show that using two carriers with the opposite
detunings, homodyne angles, and squeezing angles, but identical other
parameters (the... | [
{
"created": "Tue, 23 Sep 2014 09:37:26 GMT",
"version": "v1"
}
] | 2015-03-05 | [
[
"Korobko",
"Mikhail",
""
],
[
"Voronchev",
"Nikita",
""
],
[
"Miao",
"Haixing",
""
],
[
"Khalili",
"Farid Ya.",
""
]
] | We explore new regimes of laser interferometric gravitational-wave detectors with multiple optical carriers which allow to reduce the quantum noise of these detectors. In particular, we show that using two carriers with the opposite detunings, homodyne angles, and squeezing angles, but identical other parameters (the a... |
1105.6173 | Daisuke Ida | Daisuke Ida and Takahiro Okamoto | You Cannot Press Out the Black Hole | 6 pages | Prog. Theor. Phys. 127 (2012), 163-169 | 10.1143/PTP.127.163 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that a ball-shaped black hole region homeomorphic with D**n
cannot be pressed out, along whichever axis penetrating the black hole region,
into a black ring with a doughnut-shaped black hole region homeomorphic with
S**1 x D**(n-1). A more general prohibition law for the change of the topology
of black ho... | [
{
"created": "Tue, 31 May 2011 06:48:46 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 2012 17:36:21 GMT",
"version": "v2"
}
] | 2012-02-03 | [
[
"Ida",
"Daisuke",
""
],
[
"Okamoto",
"Takahiro",
""
]
] | It is shown that a ball-shaped black hole region homeomorphic with D**n cannot be pressed out, along whichever axis penetrating the black hole region, into a black ring with a doughnut-shaped black hole region homeomorphic with S**1 x D**(n-1). A more general prohibition law for the change of the topology of black hole... |
0910.1712 | Boris E. Meierovich | Boris E. Meierovich | Brane World as a Result of Spontaneous Symmetry Breaking | 7 pages, 2 figures, presentation for PIRT-2009 (International Meeting
"Physical Interpretations of Relativity Theory" - Moscow, 2009) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theories of brane world and multidimensional gravity are widely discussed
in the literature in connection with problems of evolution of early Universe,
including dark matter and energy. A natural physical concept is that a
distinguished surface in the space-time manifold is a topological defect
appeared as a resu... | [
{
"created": "Fri, 9 Oct 2009 11:34:22 GMT",
"version": "v1"
}
] | 2009-10-12 | [
[
"Meierovich",
"Boris E.",
""
]
] | The theories of brane world and multidimensional gravity are widely discussed in the literature in connection with problems of evolution of early Universe, including dark matter and energy. A natural physical concept is that a distinguished surface in the space-time manifold is a topological defect appeared as a result... |
2405.01325 | Peter O Hess | Leila Maghlaoui, Peter O. Hess | The effects of a minimal length on the Kerr metric and the Hawking
temperature | 21 pages, 11 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A brief review of the pseudo complex General Relativity (pcGR) will be
presented, with its consequences, as the accumulation of a dark energy around a
mass and a generalized Machs principle. The main objective in this contribution
is to determine the Hawking temperature and the Entropy for various limits: i)
The pc-S... | [
{
"created": "Thu, 2 May 2024 14:31:29 GMT",
"version": "v1"
}
] | 2024-05-03 | [
[
"Maghlaoui",
"Leila",
""
],
[
"Hess",
"Peter O.",
""
]
] | A brief review of the pseudo complex General Relativity (pcGR) will be presented, with its consequences, as the accumulation of a dark energy around a mass and a generalized Machs principle. The main objective in this contribution is to determine the Hawking temperature and the Entropy for various limits: i) The pc-Sch... |
gr-qc/0103099 | Pablo Laguna | Bernard Kelly, Pablo Laguna, Keith Lockitch, Jorge Pullin, Erik
Schnetter, Deirdre Shoemaker and Manuel Tiglio | A cure for unstable numerical evolutions of single black holes:
adjusting the standard ADM equations | 20 pages, 9 figures | Phys.Rev.D64:084013,2001 | 10.1103/PhysRevD.64.084013 | null | gr-qc | null | Numerical codes based on a direct implementation of the standard ADM
formulation of Einstein's equations have generally failed to provide long-term
stable and convergent evolutions of black hole spacetimes when excision is used
to remove the singularities. We show that, for the case of a single black hole
in spherica... | [
{
"created": "Tue, 27 Mar 2001 21:07:56 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kelly",
"Bernard",
""
],
[
"Laguna",
"Pablo",
""
],
[
"Lockitch",
"Keith",
""
],
[
"Pullin",
"Jorge",
""
],
[
"Schnetter",
"Erik",
""
],
[
"Shoemaker",
"Deirdre",
""
],
[
"Tiglio",
"Manuel",
""
]
] | Numerical codes based on a direct implementation of the standard ADM formulation of Einstein's equations have generally failed to provide long-term stable and convergent evolutions of black hole spacetimes when excision is used to remove the singularities. We show that, for the case of a single black hole in spherical ... |
1911.10543 | Ramin Hassannejad | R. Hassannejad | Deriving The Bekenstein-Hawking entropy by Statistical Mechanics and
Quantization of Non-Commuting Space | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we derive the Bekenstein-Hawking entropy by considering a
Non-Commuting two dimensional quantized space, and we will show that the
Bekenstein-Hawking entropy is valid for the system (black hole) in an
equilibrium state. Also, by using the entropy was obtained, we derive the
Einstein and Newton gravity ... | [
{
"created": "Sun, 24 Nov 2019 14:56:43 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Nov 2019 17:34:50 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Jul 2021 18:24:06 GMT",
"version": "v3"
}
] | 2021-07-08 | [
[
"Hassannejad",
"R.",
""
]
] | In this paper, we derive the Bekenstein-Hawking entropy by considering a Non-Commuting two dimensional quantized space, and we will show that the Bekenstein-Hawking entropy is valid for the system (black hole) in an equilibrium state. Also, by using the entropy was obtained, we derive the Einstein and Newton gravity eq... |
gr-qc/9609012 | Carlos Lousto | Carlos O. Lousto (U. Utah) and Richard H. Price (U. Utah) | Head-on collisions of black holes: the particle limit | 15 pages, REVTeX, 25 figures | Phys.Rev. D55 (1997) 2124-2138 | 10.1103/PhysRevD.55.2124 | null | gr-qc astro-ph hep-th | null | We compute gravitational radiation waveforms, spectra and energies for a
point particle of mass $m_0$ falling from rest at radius $r_0$ into a
Schwarzschild hole of mass $M$. This radiation is found to lowest order in
$(m_0/M)$ with the use of a Laplace transform. In contrast with numerical
relativity results for hea... | [
{
"created": "Thu, 5 Sep 1996 00:57:20 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Lousto",
"Carlos O.",
"",
"U. Utah"
],
[
"Price",
"Richard H.",
"",
"U. Utah"
]
] | We compute gravitational radiation waveforms, spectra and energies for a point particle of mass $m_0$ falling from rest at radius $r_0$ into a Schwarzschild hole of mass $M$. This radiation is found to lowest order in $(m_0/M)$ with the use of a Laplace transform. In contrast with numerical relativity results for head-... |
2007.11468 | Massimiliano Rinaldi | Christian Dioguardi and Massimiliano Rinaldi | A note on the linear stability of black holes in quadratic gravity | Little changes, version accepted by EPJ Plus | null | 10.1140/epjp/s13360-020-00935-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes in $f(R)$-gravity are known to be unstable, especially the
rotating ones. In particular, an instability develops that looks like the
classical black hole bomb mechanism: the linearized modified Einstein equations
are characterized by an effective mass that acts like a massive scalar
perturbation on the Ke... | [
{
"created": "Wed, 22 Jul 2020 14:41:13 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Nov 2020 08:30:42 GMT",
"version": "v2"
}
] | 2020-11-12 | [
[
"Dioguardi",
"Christian",
""
],
[
"Rinaldi",
"Massimiliano",
""
]
] | Black holes in $f(R)$-gravity are known to be unstable, especially the rotating ones. In particular, an instability develops that looks like the classical black hole bomb mechanism: the linearized modified Einstein equations are characterized by an effective mass that acts like a massive scalar perturbation on the Kerr... |
gr-qc/0409059 | Aharon Davidson | Aharon Davidson | Rippled Cosmological Dark Matter from Damped Oscillating Newton Constant | RevTex4, 12 pages, 5 figures; Minor revision, References added | Class.Quant.Grav. 22 (2005) 1119-1127 | 10.1088/0264-9381/22/6/013 | null | gr-qc astro-ph | null | Let the reciprocal Newton 'constant' be an apparently non-dynamical
Brans-Dicke scalar field damped oscillating towards its General Relativistic
VEV. We show, without introducing additional matter fields or dust, that the
corresponding cosmological evolution averagely resembles, in the Jordan frame,
the familiar dark... | [
{
"created": "Wed, 15 Sep 2004 04:36:53 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Nov 2004 20:09:33 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Davidson",
"Aharon",
""
]
] | Let the reciprocal Newton 'constant' be an apparently non-dynamical Brans-Dicke scalar field damped oscillating towards its General Relativistic VEV. We show, without introducing additional matter fields or dust, that the corresponding cosmological evolution averagely resembles, in the Jordan frame, the familiar dark r... |
gr-qc/9510019 | Kiyoshi Ezawa | Kiyoshi Ezawa | Multi-plaquette solutions for discretized Ashtekar gravity | 11 pages Latex (2 figures available as a postscript file, the rough
discussion on the non-normalizability has been made exact. ) | Mod.Phys.Lett. A11 (1996) 349-356 | 10.1142/S0217732396000394 | OU-HET/223 | gr-qc | null | A discretized version of canonical quantum gravity proposed by Loll is
investigated. After slightly modifying Loll's discretized Hamiltonian
constraint, we encode its action on the spin network states in terms of
combinatorial topological manipulations of the lattice loops. Using this
topological formulation we find ... | [
{
"created": "Wed, 11 Oct 1995 03:33:43 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Oct 1995 13:19:46 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Ezawa",
"Kiyoshi",
""
]
] | A discretized version of canonical quantum gravity proposed by Loll is investigated. After slightly modifying Loll's discretized Hamiltonian constraint, we encode its action on the spin network states in terms of combinatorial topological manipulations of the lattice loops. Using this topological formulation we find ne... |
gr-qc/0203081 | Chris Clarkson | J. Ibanez, C.A. Clarkson and A.A. Coley | On Scaling Solutions with a Dissipative Fluid | 8 pages and 5 figures; to appear in Class. Quantum Grav | Class.Quant.Grav. 19 (2002) 3067-3076 | 10.1088/0264-9381/19/11/320 | null | gr-qc astro-ph | null | We study the asymptotic behaviour of scaling solutions with a dissipative
fluid and we show that, contrary to recent claims, the existence of stable
accelerating attractor solution which solves the `energy' coincidence problem
depends crucially on the chosen equations of state for the thermodynamical
variables. We di... | [
{
"created": "Mon, 25 Mar 2002 14:58:37 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Ibanez",
"J.",
""
],
[
"Clarkson",
"C. A.",
""
],
[
"Coley",
"A. A.",
""
]
] | We study the asymptotic behaviour of scaling solutions with a dissipative fluid and we show that, contrary to recent claims, the existence of stable accelerating attractor solution which solves the `energy' coincidence problem depends crucially on the chosen equations of state for the thermodynamical variables. We disc... |
1508.01017 | Roderich Tumulka | Sheldon Goldstein, Ward Struyve, Roderich Tumulka | The Bohmian Approach to the Problems of Cosmological Quantum
Fluctuations | 24 pages LaTeX, 1 figure; written for the "Guide to the Philosophy of
Cosmology" edited by Anna Ijjas and Barry Loewer | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are two kinds of quantum fluctuations relevant to cosmology that we
focus on in this article: those that form the seeds for structure formation in
the early universe and those giving rise to Boltzmann brains in the late
universe. First, structure formation requires slight inhomogeneities in the
density of matte... | [
{
"created": "Wed, 5 Aug 2015 09:38:19 GMT",
"version": "v1"
}
] | 2015-08-06 | [
[
"Goldstein",
"Sheldon",
""
],
[
"Struyve",
"Ward",
""
],
[
"Tumulka",
"Roderich",
""
]
] | There are two kinds of quantum fluctuations relevant to cosmology that we focus on in this article: those that form the seeds for structure formation in the early universe and those giving rise to Boltzmann brains in the late universe. First, structure formation requires slight inhomogeneities in the density of matter ... |
2208.06830 | De-Cheng Zou | Chao-Ming Zhang, Ming Zhang and De-Cheng Zou | Gravitational decoupling for hairy black holes in asymptotically AdS
spacetimes | 22 pages, 1 figures | Chinese Physics C Vol. 47, No. 1 (2023) 015106 | 10.1088/1674-1137/ac9b2c | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, the gravitational decoupling approach via extended geometric
deformation is utilized to generate analytical black hole solutions owing to
its simplicity and effectiveness. Considering the external fields surrounding
Schwarzschild AdS black holes, we derive hairy black hole solutions in
asymptotic AdS s... | [
{
"created": "Sun, 14 Aug 2022 11:07:49 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Dec 2022 02:13:15 GMT",
"version": "v2"
}
] | 2022-12-12 | [
[
"Zhang",
"Chao-Ming",
""
],
[
"Zhang",
"Ming",
""
],
[
"Zou",
"De-Cheng",
""
]
] | In this study, the gravitational decoupling approach via extended geometric deformation is utilized to generate analytical black hole solutions owing to its simplicity and effectiveness. Considering the external fields surrounding Schwarzschild AdS black holes, we derive hairy black hole solutions in asymptotic AdS spa... |
1205.5733 | Etera R. Livine | Etera R. Livine, Daniel R. Terno | Entropy in the Classical and Quantum Polymer Black Hole Models | 24 pages | Class. Quantum Grav. 29, 224012 (2012) | 10.1088/0264-9381/29/22/224012 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the entropy counting for black hole horizons in loop quantum
gravity (LQG). We argue that the space of 3d closed polyhedra is the classical
counterpart of the space of SU(2) intertwiners at the quantum level. Then
computing the entropy for the boundary horizon amounts to calculating the
density of poly... | [
{
"created": "Fri, 25 May 2012 15:36:50 GMT",
"version": "v1"
}
] | 2012-11-07 | [
[
"Livine",
"Etera R.",
""
],
[
"Terno",
"Daniel R.",
""
]
] | We investigate the entropy counting for black hole horizons in loop quantum gravity (LQG). We argue that the space of 3d closed polyhedra is the classical counterpart of the space of SU(2) intertwiners at the quantum level. Then computing the entropy for the boundary horizon amounts to calculating the density of polyhe... |
2306.11744 | Claudio Cremaschini | Claudio Cremaschini, Ji\v{r}\'i Kov\'a\v{r}, Zden\v{e}k Stuchl\'ik and
Massimo Tessarotto | Kinetic formulation of Tolman-Ehrenfest effect: Non-ideal fluids in
Schwarzschild and Kerr space-times | 7 pages. arXiv admin note: text overlap with arXiv:2306.10434 | Physics of Fluids 34, 091701 (2022) | 10.1063/5.0111200 | null | gr-qc astro-ph.HE cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A review of the original thermodynamic formulation of the Tolman-Ehrenfest
effect prescribing the temperature profile of uncharged fluid at thermal
equilibrium forming stationary configurations in curved space-time is proposed.
A statistical description based on relativistic kinetic theory is implemented.
In this con... | [
{
"created": "Sat, 17 Jun 2023 22:52:18 GMT",
"version": "v1"
}
] | 2023-06-22 | [
[
"Cremaschini",
"Claudio",
""
],
[
"Kovář",
"Jiří",
""
],
[
"Stuchlík",
"Zdeněk",
""
],
[
"Tessarotto",
"Massimo",
""
]
] | A review of the original thermodynamic formulation of the Tolman-Ehrenfest effect prescribing the temperature profile of uncharged fluid at thermal equilibrium forming stationary configurations in curved space-time is proposed. A statistical description based on relativistic kinetic theory is implemented. In this conte... |
gr-qc/0101031 | Seth A. Major | Seth A. Major and Kevin L. Setter | Gravitational Statistical Mechanics: A model | 19 pages, 1 figure; v2: typos corrected, first law discussion
removed, geometric particle description revised | Class.Quant.Grav. 18 (2001) 5125-5142 | 10.1088/0264-9381/18/23/309 | null | gr-qc hep-th | null | Using the quantum Hamiltonian for a gravitational system with boundary, we
find the partition function and derive the resulting thermodynamics. The
Hamiltonian is the boundary term required by functional differentiability of
the action for Lorentzian general relativity. In this model, states of quantum
geometry are r... | [
{
"created": "Tue, 9 Jan 2001 18:22:23 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Feb 2001 15:55:51 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Major",
"Seth A.",
""
],
[
"Setter",
"Kevin L.",
""
]
] | Using the quantum Hamiltonian for a gravitational system with boundary, we find the partition function and derive the resulting thermodynamics. The Hamiltonian is the boundary term required by functional differentiability of the action for Lorentzian general relativity. In this model, states of quantum geometry are rep... |
1608.04293 | Sergio Rica | Sergio Rica | Wave turbulence theory for gravitational waves in general relativity:
The Space-Time Kolmogorov spectrum | 5 pages | null | null | null | gr-qc nlin.PS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent observation of gravitational waves, stimulates the question of the
longtime evolution of the space-time fluctuations. Gravitational waves interact
themselves through the nonlinear character of Einstein's equations of general
relativity. This nonlinear wave interaction allows the spectral energy transfer
fr... | [
{
"created": "Wed, 10 Aug 2016 22:22:42 GMT",
"version": "v1"
}
] | 2016-08-16 | [
[
"Rica",
"Sergio",
""
]
] | The recent observation of gravitational waves, stimulates the question of the longtime evolution of the space-time fluctuations. Gravitational waves interact themselves through the nonlinear character of Einstein's equations of general relativity. This nonlinear wave interaction allows the spectral energy transfer from... |
gr-qc/0506002 | Yasushi Mino | Yasushi Mino | From the self-force problem to the Radiation reaction formula | a special issue for Classical and Quantum Gravity, a review article
of Capra Ranch Meetings | null | 10.1088/0264-9381/22/15/007 | null | gr-qc | null | We review a recent theoretical progress in the so-called self-force problem
of a general relativistic two-body system. Although a two-body system in
Newtonian gravity is a very simple problem, some fundamental issues are
involved in relativistic gravity. Besides, because of recent projects for
gravitational wave dete... | [
{
"created": "Tue, 31 May 2005 23:02:10 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Mino",
"Yasushi",
""
]
] | We review a recent theoretical progress in the so-called self-force problem of a general relativistic two-body system. Although a two-body system in Newtonian gravity is a very simple problem, some fundamental issues are involved in relativistic gravity. Besides, because of recent projects for gravitational wave detect... |
1806.09290 | Jibril Ben Achour | Jibril Ben Achour and Etera R. Livine | Polymer Quantum Cosmology: Lifting quantization ambiguities using a
$SL(2,\mathbb{R})$ conformal symmetry | 8 pages, match the published version in PRD | Phys. Rev. D 99, 126013 (2019) | 10.1103/PhysRevD.99.126013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we stress that the simplest cosmological model consisting in
a massless scalar field minimally coupled to homogeneous and isotropic gravity
has an in-built $\SL(2,\mathbb{R})$ symmetry. Protecting this symmetry
naturally provides an efficient way to constrain the quantization of this
cosmological syst... | [
{
"created": "Mon, 25 Jun 2018 05:01:29 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Apr 2019 15:47:03 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Apr 2019 14:03:18 GMT",
"version": "v3"
},
{
"created": "Wed, 17 Jul 2019 12:13:44 GMT",
"version": "v4"
}
] | 2019-07-18 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Livine",
"Etera R.",
""
]
] | In this letter, we stress that the simplest cosmological model consisting in a massless scalar field minimally coupled to homogeneous and isotropic gravity has an in-built $\SL(2,\mathbb{R})$ symmetry. Protecting this symmetry naturally provides an efficient way to constrain the quantization of this cosmological system... |
1812.08084 | Masaki Yamada | Alexander Vilenkin and Masaki Yamada | Tunneling wave function of the universe II: the backreaction problem | 9 pages; v2: Path integral analysis is extended to a massive scalar
field | Phys. Rev. D 99, 066010 (2019) | 10.1103/PhysRevD.99.066010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The tunneling wave function of the universe is calculated exactly for a de
Sitter minisuperspace model with a massless conformally coupled scalar field,
both by solving the Wheeler-DeWitt equation and by evaluating the Lorentzian
path integral. The same wave function is found in both approaches. The
back-reaction of ... | [
{
"created": "Wed, 19 Dec 2018 16:55:14 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2019 22:03:04 GMT",
"version": "v2"
}
] | 2019-04-03 | [
[
"Vilenkin",
"Alexander",
""
],
[
"Yamada",
"Masaki",
""
]
] | The tunneling wave function of the universe is calculated exactly for a de Sitter minisuperspace model with a massless conformally coupled scalar field, both by solving the Wheeler-DeWitt equation and by evaluating the Lorentzian path integral. The same wave function is found in both approaches. The back-reaction of qu... |
1401.8203 | Alexander Graham | Alexander A. H. Graham and Rahul Jha | Non-Existence of Black Holes with Non-Canonical Scalar Fields | 6 pages. v2: typos corrected, title changed and some additional
comments added in the conclusion. Matches published version. v3: errors
corrected, references added | Phys. Rev. D 89, 084056 (2014) | 10.1103/PhysRevD.89.084056 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the existence of stationary black holes with a non-canonical scalar
field as a matter source. We prove a simple black hole no-hair theorem which
rules out the existence of asymptotically flat black holes which are static or
stationary and axisymmetric possessing scalar hair for a wide class of
non-canonical ... | [
{
"created": "Fri, 31 Jan 2014 15:58:29 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Apr 2014 17:12:25 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Aug 2015 19:08:01 GMT",
"version": "v3"
}
] | 2015-08-18 | [
[
"Graham",
"Alexander A. H.",
""
],
[
"Jha",
"Rahul",
""
]
] | We study the existence of stationary black holes with a non-canonical scalar field as a matter source. We prove a simple black hole no-hair theorem which rules out the existence of asymptotically flat black holes which are static or stationary and axisymmetric possessing scalar hair for a wide class of non-canonical sc... |
gr-qc/0702037 | Alberto Saa | Luciana A. Elias and Alberto Saa | Non-Minimally Coupled Cosmology as Geodesic Motion | Presented in the Fifth International Conference on Mathematical
Methods in Physics, IC2006, April 24-28 2006, CBPF, Rio de Janeiro, Brazil | PoSIC2006:039,2006 | null | null | gr-qc | null | Recent works showing that homogeneous and isotropic cosmologies involving
scalar fields correspond to geodesics of certain augmented spaces are
generalized to the non-minimal coupling case. As the Maupertuis-Jacobi
principle in classical mechanics, this result allows us, in principle, to infer
some of the dynamical p... | [
{
"created": "Wed, 7 Feb 2007 00:23:07 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Elias",
"Luciana A.",
""
],
[
"Saa",
"Alberto",
""
]
] | Recent works showing that homogeneous and isotropic cosmologies involving scalar fields correspond to geodesics of certain augmented spaces are generalized to the non-minimal coupling case. As the Maupertuis-Jacobi principle in classical mechanics, this result allows us, in principle, to infer some of the dynamical pro... |
1304.5992 | Eugeny Babichev | Eugeny Babichev and Alessandro Fabbri | Instability of black holes in massive gravity | 5 pages; v2: references added; v3: minor changes, matches the
published version | Class. Quantum Grav. 30 (2013) 152001 | 10.1088/0264-9381/30/15/152001 | LPT-ORSAY 13-34 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that linear perturbations around the simplest black hole solution of
massive bi-gravity theories, the bi-Schwarzschild solution, exhibit an unstable
mode featuring the Gregory-Laflamme instability of higher-dimensional black
strings. The result is obtained for the massive gravity theory which is free
from the... | [
{
"created": "Mon, 22 Apr 2013 15:52:02 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Apr 2013 14:08:59 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Jul 2013 16:38:17 GMT",
"version": "v3"
}
] | 2013-07-05 | [
[
"Babichev",
"Eugeny",
""
],
[
"Fabbri",
"Alessandro",
""
]
] | We show that linear perturbations around the simplest black hole solution of massive bi-gravity theories, the bi-Schwarzschild solution, exhibit an unstable mode featuring the Gregory-Laflamme instability of higher-dimensional black strings. The result is obtained for the massive gravity theory which is free from the B... |
gr-qc/0403001 | James B. Hartle | James B. Hartle | The Physics of 'Now' | 12 pages, 4 figures, Revtex4, minor corrections | Am.J.Phys. 73 (2005) 101-109 | 10.1119/1.1783900 | null | gr-qc physics.pop-ph q-bio.NC | null | The world is four-dimensional according to fundamental physics, governed by
basic laws that operate in a spacetime that has no unique division into space
and time. Yet our subjective experience is divided into present, past, and
future. This paper discusses the origin of this division in terms of simple
models of inf... | [
{
"created": "Fri, 27 Feb 2004 21:59:47 GMT",
"version": "v1"
},
{
"created": "Fri, 21 May 2004 22:45:51 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Hartle",
"James B.",
""
]
] | The world is four-dimensional according to fundamental physics, governed by basic laws that operate in a spacetime that has no unique division into space and time. Yet our subjective experience is divided into present, past, and future. This paper discusses the origin of this division in terms of simple models of infor... |
2112.01729 | Kunal Lobo | Samuel E. Gralla and Kunal Lobo | Electromagnetic Scoot | 10 pages, 1 figure, matches published version plus a note added | null | 10.1103/PhysRevD.105.084053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent work on scattering of massive bodies in general relativity has
revealed that the mechanical center of mass of the system (or, more precisely,
its relativistic mass moment) undergoes a shift during the scattering process.
We show that the same phenomenon occurs in classical scattering of charged
particles in fl... | [
{
"created": "Fri, 3 Dec 2021 05:58:50 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jun 2024 21:46:50 GMT",
"version": "v2"
}
] | 2024-06-06 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Lobo",
"Kunal",
""
]
] | Recent work on scattering of massive bodies in general relativity has revealed that the mechanical center of mass of the system (or, more precisely, its relativistic mass moment) undergoes a shift during the scattering process. We show that the same phenomenon occurs in classical scattering of charged particles in flat... |
1106.1961 | Lorenzo Fatibene | L. Fatibene, M. Francaviglia | Weyl Geometries and Timelike Geodesics | 8 pages, reference added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In view of Ehlers-Pirani-Schild formalism, since 1972 Weyl geometries should
be considered to be the most appropriate and complete framework to represent
(relativistic) gravitational fields. We shall here show that in any given
Lorentzian spacetime (M,g) that admits global timelike vector fields any such
vector field... | [
{
"created": "Fri, 10 Jun 2011 06:05:23 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Jun 2011 12:54:08 GMT",
"version": "v2"
}
] | 2011-06-21 | [
[
"Fatibene",
"L.",
""
],
[
"Francaviglia",
"M.",
""
]
] | In view of Ehlers-Pirani-Schild formalism, since 1972 Weyl geometries should be considered to be the most appropriate and complete framework to represent (relativistic) gravitational fields. We shall here show that in any given Lorentzian spacetime (M,g) that admits global timelike vector fields any such vector field u... |
2210.07165 | Donato Bini | Donato Bini, Thibault Damour, Andrea Geralico | Radiated momentum and radiation-reaction in gravitational two-body
scattering including time-asymmetric effects | 38 pages; revtex macros used; V2: slightly expanded version | null | 10.1103/PhysRevD.107.024012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute to high post-Newtonian accuracy the 4-momentum (linear momentum,
and energy), radiated as gravitational waves in a two-body system undergoing
gravitational scattering. We include, for the first time, all the relevant {\it
time-asymmetric} effects that arise when consistently going three post
Newtonian orde... | [
{
"created": "Thu, 13 Oct 2022 16:42:27 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Nov 2022 22:02:47 GMT",
"version": "v2"
}
] | 2023-01-25 | [
[
"Bini",
"Donato",
""
],
[
"Damour",
"Thibault",
""
],
[
"Geralico",
"Andrea",
""
]
] | We compute to high post-Newtonian accuracy the 4-momentum (linear momentum, and energy), radiated as gravitational waves in a two-body system undergoing gravitational scattering. We include, for the first time, all the relevant {\it time-asymmetric} effects that arise when consistently going three post Newtonian orders... |
2307.01911 | Genly Le\'on | Genly Leon (Catolica del Norte U. and DUT, Durban), Andronikos
Paliathanasis (DUT, Durban and Catolica del Norte U.) and Alfredo D. Millano
(Catolica del Norte U.) | Dynamical system analysis in multiscalar-torsion cosmology | 32 pages, 16 compound figures, revised version, improved discussion | Physics of the Dark Universe, Volume 44, 2024, 101459 | 10.1016/j.dark.2024.101459 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the phase-space of a multiscalar-torsion gravitational theory
within a cosmological framework characterized by a spatially flat
Friedmann-Lema\^{\i}tre-Robertson-Walker model. Our investigation focuses on
teleparallelism and involves a gravitational model featuring two scalar fields,
where one scalar field... | [
{
"created": "Tue, 4 Jul 2023 20:40:53 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2024 12:58:39 GMT",
"version": "v2"
}
] | 2024-03-07 | [
[
"Leon",
"Genly",
"",
"Catolica del Norte U. and DUT, Durban"
],
[
"Paliathanasis",
"Andronikos",
"",
"DUT, Durban and Catolica del Norte U."
],
[
"Millano",
"Alfredo D.",
"",
"Catolica del Norte U."
]
] | We explore the phase-space of a multiscalar-torsion gravitational theory within a cosmological framework characterized by a spatially flat Friedmann-Lema\^{\i}tre-Robertson-Walker model. Our investigation focuses on teleparallelism and involves a gravitational model featuring two scalar fields, where one scalar field i... |
gr-qc/0409006 | Luca Bombelli | Luca Bombelli, Alejandro Corichi, Oliver Winkler | Semiclassical Quantum Gravity: Statistics of Combinatorial Riemannian
Geometries | 26 pages, 2 figures | Annalen Phys. 14 (2005) 499-519 | 10.1002/andp.200410144 | null | gr-qc hep-th math-ph math.MP | null | This paper is a contribution to the development of a framework, to be used in
the context of semiclassical canonical quantum gravity, in which to frame
questions about the correspondence between discrete spacetime structures at
"quantum scales" and continuum, classical geometries at large scales. Such a
correspondenc... | [
{
"created": "Wed, 1 Sep 2004 16:15:37 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Bombelli",
"Luca",
""
],
[
"Corichi",
"Alejandro",
""
],
[
"Winkler",
"Oliver",
""
]
] | This paper is a contribution to the development of a framework, to be used in the context of semiclassical canonical quantum gravity, in which to frame questions about the correspondence between discrete spacetime structures at "quantum scales" and continuum, classical geometries at large scales. Such a correspondence ... |
gr-qc/0203007 | Yungui Gong | Yungui Gong | Quintessence Model and Observational Constraints | update references,add acknowledgements and correct some errors,
accepted for publication in class. and quant. grav | Class.Quant.Grav.19:4537-4542,2002 | 10.1088/0264-9381/19/17/305 | null | gr-qc | null | The recent observations of type Ia supernovae strongly support that the
universe is accelerating now and decelerated in the recent past. By assuming a
general relation between the quintessence potential and the quintessence
kinetic energy, a general relation is found between the quintessence energy
density and the sc... | [
{
"created": "Mon, 4 Mar 2002 05:48:01 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Jul 2002 19:20:45 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Gong",
"Yungui",
""
]
] | The recent observations of type Ia supernovae strongly support that the universe is accelerating now and decelerated in the recent past. By assuming a general relation between the quintessence potential and the quintessence kinetic energy, a general relation is found between the quintessence energy density and the scal... |
gr-qc/0610075 | Mihalis Dafermos | Mihalis Dafermos and Alan D. Rendall | Strong cosmic censorship for T^2-symmetric cosmological spacetimes with
collisionless matter | 17 pages, no figures | null | null | null | gr-qc | null | We prove strong cosmic censorship for T^2-symmetric cosmological spacetimes
(with spatial topology T^3 and vanishing cosmological constant Lambda) with
collisionless matter. Gowdy symmetric spacetimes constitute a special case. The
formulation of the conjecture is in terms of generic C^2-inextendibility of the
metric... | [
{
"created": "Sat, 14 Oct 2006 16:58:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dafermos",
"Mihalis",
""
],
[
"Rendall",
"Alan D.",
""
]
] | We prove strong cosmic censorship for T^2-symmetric cosmological spacetimes (with spatial topology T^3 and vanishing cosmological constant Lambda) with collisionless matter. Gowdy symmetric spacetimes constitute a special case. The formulation of the conjecture is in terms of generic C^2-inextendibility of the metric. ... |
2202.10661 | Indranil Chakraborty | Indranil Chakraborty and Sayan Kar (IIT Kharagpur) | A simple analytic example of the gravitational wave memory effect | Some minor typos corrected, matches with the published version in
EPJP | null | 10.1140/epjp/s13360-022-02593-y | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | We report an analytical example of the gravitational wave memory effect in
exact plane wave spacetimes. A square pulse profile is chosen which gives rise
to a curved wave region sandwiched between two flat Minkowski spacetimes.
Working in the Brinkmann coordinate system, we solve the geodesic equations
exactly in all... | [
{
"created": "Tue, 22 Feb 2022 04:12:53 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Apr 2022 16:45:31 GMT",
"version": "v2"
}
] | 2022-04-05 | [
[
"Chakraborty",
"Indranil",
"",
"IIT Kharagpur"
],
[
"Kar",
"Sayan",
"",
"IIT Kharagpur"
]
] | We report an analytical example of the gravitational wave memory effect in exact plane wave spacetimes. A square pulse profile is chosen which gives rise to a curved wave region sandwiched between two flat Minkowski spacetimes. Working in the Brinkmann coordinate system, we solve the geodesic equations exactly in all t... |
1210.0156 | Carlos F. Sopuerta | Carlos F. Sopuerta (ICE (CSIC-IEEC)) | Probing the strong gravity regime with eLISA: Progress on EMRIs | 10 pages, 2 figures. LaTeX, ASP style. Plenary talk presented at the
9th International LISA Symposium, 21-25 May 2012, BnF-Paris, France | null | null | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The capture of a stellar-mass compact object by a supermassive black hole and
the subsequent inspiral (driven by gravitational radiation emission) constitute
one of the most important sources of gravitational waves for space-based
observatories like eLISA/NGO. In this article we describe their potential as
high-preci... | [
{
"created": "Sat, 29 Sep 2012 22:11:59 GMT",
"version": "v1"
}
] | 2012-10-02 | [
[
"Sopuerta",
"Carlos F.",
"",
"ICE"
]
] | The capture of a stellar-mass compact object by a supermassive black hole and the subsequent inspiral (driven by gravitational radiation emission) constitute one of the most important sources of gravitational waves for space-based observatories like eLISA/NGO. In this article we describe their potential as high-precisi... |
1502.04814 | Mohammad Vahid Takook | M.V. Takook, S. Rouhani | Quantum Linear Gravity in de Sitter Universe On Bunch-Davies vacuum
state | 7 pages. further improvements added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In de Sitter ambient space formalism, the linear gravity can be written in
terms of a minimally coupled scalar field and a polarization tensor. In this
formalism, the massless minimally coupled scalar field can be quantized on
Bunch-Davies vacuum state, that preserves the de Sitter invariance, the
analyticity and rem... | [
{
"created": "Tue, 17 Feb 2015 07:22:15 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jun 2016 05:42:26 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Aug 2017 10:25:08 GMT",
"version": "v3"
}
] | 2017-08-21 | [
[
"Takook",
"M. V.",
""
],
[
"Rouhani",
"S.",
""
]
] | In de Sitter ambient space formalism, the linear gravity can be written in terms of a minimally coupled scalar field and a polarization tensor. In this formalism, the massless minimally coupled scalar field can be quantized on Bunch-Davies vacuum state, that preserves the de Sitter invariance, the analyticity and remov... |
gr-qc/0208005 | John W. Moffat | J.W. Moffat and G.T. Gillies | Satellite E\"otv\"os Test of the Weak Equivalence Principle for
Zero-Point Vacuum Energy | 9 pages. Latex file. No figures. Additional comments about the
proposed experiment | NewJ.Phys.4:92,2002 | 10.1088/1367-2630/4/1/392 | null | gr-qc astro-ph hep-ph hep-th quant-ph | null | An E\"otv\"os experiment to test the weak equivalence principle (WEP) for
zero-point vacuum energy is proposed using a satellite. Following the
suggestion of Ross for a terrestrial experiment of this type, the acceleration
of a spherical test mass of aluminum would be compared with that of a similar
test mass made fr... | [
{
"created": "Fri, 2 Aug 2002 19:13:38 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Oct 2002 21:24:55 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Moffat",
"J. W.",
""
],
[
"Gillies",
"G. T.",
""
]
] | An E\"otv\"os experiment to test the weak equivalence principle (WEP) for zero-point vacuum energy is proposed using a satellite. Following the suggestion of Ross for a terrestrial experiment of this type, the acceleration of a spherical test mass of aluminum would be compared with that of a similar test mass made from... |
gr-qc/0107062 | Luciano Rezzolla | Luciano Rezzolla, Frederick L. Lamb, Dragoljub Markovic, and Stuart L.
Shapiro | Properties of r modes in rotating magnetic neutron stars. II. Evolution
of the r modes and stellar magnetic field | 16 pages, 12 figures. To appear in Phys. Rev. D | Phys. Rev. D, 64 104014 (2001) | 10.1103/PhysRevD.64.104014 | null | gr-qc astro-ph | null | The evolution of the r-mode instability is likely to be accompanied by
secular kinematic effects which will produce differential rotation with large
scale drifts of fluid elements, mostly in the azimuthal direction. As first
discussed by Rezzolla, Lamb and Shapiro 2000, the interaction of these secular
velocity field... | [
{
"created": "Tue, 17 Jul 2001 14:02:38 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Rezzolla",
"Luciano",
""
],
[
"Lamb",
"Frederick L.",
""
],
[
"Markovic",
"Dragoljub",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | The evolution of the r-mode instability is likely to be accompanied by secular kinematic effects which will produce differential rotation with large scale drifts of fluid elements, mostly in the azimuthal direction. As first discussed by Rezzolla, Lamb and Shapiro 2000, the interaction of these secular velocity fields ... |
1406.7480 | Stephen McCormick | Stephen McCormick | First Law of Black Hole Mechanics as a Condition for Stationarity | 20 pages | Phys. Rev. D 90, 104034 (2014) | 10.1103/PhysRevD.90.104034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In earlier work [arXiv:1302.1237], we provided a Hilbert manifold structure
for the phase space for the Einstein-Yang-Mills equations, and used this to
prove a condition for initial data to be stationary. Here we use the same phase
space to consider the evolution of initial data exterior to some closed
2-surface boun... | [
{
"created": "Sun, 29 Jun 2014 09:46:05 GMT",
"version": "v1"
}
] | 2014-11-26 | [
[
"McCormick",
"Stephen",
""
]
] | In earlier work [arXiv:1302.1237], we provided a Hilbert manifold structure for the phase space for the Einstein-Yang-Mills equations, and used this to prove a condition for initial data to be stationary. Here we use the same phase space to consider the evolution of initial data exterior to some closed 2-surface bounda... |
1510.03789 | Valerio Faraoni | Valerio Faraoni | Is the Hawking quasilocal energy "Newtonian"? | 12 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Misner-Sharp-Hernandez mass defined in general relativity and in
spherical symmetry has been recognized as having a Newtonian character in
previous literature. In order to better understand this aspect we relax
spherical symmetry and we study the generalization of the
Misner-Sharp-Hernandez mass to general spacet... | [
{
"created": "Tue, 13 Oct 2015 17:27:43 GMT",
"version": "v1"
}
] | 2015-10-14 | [
[
"Faraoni",
"Valerio",
""
]
] | The Misner-Sharp-Hernandez mass defined in general relativity and in spherical symmetry has been recognized as having a Newtonian character in previous literature. In order to better understand this aspect we relax spherical symmetry and we study the generalization of the Misner-Sharp-Hernandez mass to general spacetim... |
2009.07540 | Nils Alex | Nils Alex | Solutions of gravitational field equations for weakly birefringent
spacetimes | 6 pages. Prepared for Proceedings of the Fifteenth Marcel Grossmann
meeting (Rome, 1-7 July 2018), Session AT5, Constructive Gravity | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The constructive gravity programme applied to electrodynamics with vacuum
birefringence yields the---up to unknown gravitational constants---unique
compatible gravity theory for the underlying non-metric geometry. Starting from
a perturbative variant of this procedure, we solve the resulting gravitational
field equat... | [
{
"created": "Wed, 16 Sep 2020 08:27:01 GMT",
"version": "v1"
}
] | 2020-09-17 | [
[
"Alex",
"Nils",
""
]
] | The constructive gravity programme applied to electrodynamics with vacuum birefringence yields the---up to unknown gravitational constants---unique compatible gravity theory for the underlying non-metric geometry. Starting from a perturbative variant of this procedure, we solve the resulting gravitational field equatio... |
1707.01359 | Leandros Perivolaropoulos | A. Lymperis, L. Perivolaropoulos, S. Lola | Sudden Future Singularities in Quintessence and Scalar-Tensor
Quintessence Models | 15 pages, 12 Figures. The mathematica file that were used for the
construction of the Figures may be downloaded from
http://leandros.physics.uoi.gr/quint-singularities/math-quint.zip | Phys. Rev. D 96, 084024 (2017) | 10.1103/PhysRevD.96.084024 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate analytically and numerically the existence of geodesically
complete singularities in quintessence and scalar tensor quintessence models
with scalar field potential of the form $V(\phi)\sim \vert \phi\vert^n$ with
$0<n<1$. In the case of quintessence, the singularity which occurs at $\phi=0$,
involves d... | [
{
"created": "Tue, 4 Jul 2017 09:51:11 GMT",
"version": "v1"
}
] | 2017-10-18 | [
[
"Lymperis",
"A.",
""
],
[
"Perivolaropoulos",
"L.",
""
],
[
"Lola",
"S.",
""
]
] | We demonstrate analytically and numerically the existence of geodesically complete singularities in quintessence and scalar tensor quintessence models with scalar field potential of the form $V(\phi)\sim \vert \phi\vert^n$ with $0<n<1$. In the case of quintessence, the singularity which occurs at $\phi=0$, involves div... |
2406.17048 | Bence Racsk\'o | Bence Racsk\'o | Junction conditions in a general field theory | 45 pages | Class. Quantum Grav. 41, 015020 (2024) | 10.1088/1361-6382/ad0fb6 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | It is well-known in the modified gravity scene that the calculation of
junction conditions in certain complicated theories leads to ambiguities and
conflicts between the various formulations. This paper introduces a general
framework to compute junction conditions in any reasonable classical field
theory and analyzes... | [
{
"created": "Mon, 24 Jun 2024 18:09:45 GMT",
"version": "v1"
}
] | 2024-06-26 | [
[
"Racskó",
"Bence",
""
]
] | It is well-known in the modified gravity scene that the calculation of junction conditions in certain complicated theories leads to ambiguities and conflicts between the various formulations. This paper introduces a general framework to compute junction conditions in any reasonable classical field theory and analyzes t... |
2105.03261 | Genly Le\'on | Andronikos Paliathanasis (DUT, Durban and Chile Austral U., Valdivia)
and Genly Leon (Catolica del Norte U.) | Global dynamics of the hyperbolic Chiral-Phantom model | 24 pages, 11 compound figures. Section 4 about linear cosmological
perturbations added | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a detailed analysis of the asymptotic behavior of a multifield
cosmological model with phantom terms. Specifically, we consider the
Chiral-Phantom model consisting of two scalar fields with a mixed kinetic term,
while one scalar field has negative kinetic energy, that is, it has phantom
properties. We show... | [
{
"created": "Fri, 7 May 2021 13:41:49 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Dec 2021 15:46:05 GMT",
"version": "v2"
}
] | 2021-12-14 | [
[
"Paliathanasis",
"Andronikos",
"",
"DUT, Durban and Chile Austral U., Valdivia"
],
[
"Leon",
"Genly",
"",
"Catolica del Norte U."
]
] | We perform a detailed analysis of the asymptotic behavior of a multifield cosmological model with phantom terms. Specifically, we consider the Chiral-Phantom model consisting of two scalar fields with a mixed kinetic term, while one scalar field has negative kinetic energy, that is, it has phantom properties. We show t... |
2405.08145 | Pierre Vanhove | P. Brax, P. Vanhove | $\mathcal{R}^2$ effectively from Inflation to Dark Energy | This essay received an Honorable Mention in the 2024 Gravity Research
Foundation Essay Competition. 10 pages | null | null | IPhT-t24/009 | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We consider the single-parameter $\mathcal{R}+ c\mathcal{R}^2$ gravitational
action and use constraints from astrophysics and the laboratory to derive a
natural relation between the coefficient $c$ and the value of the cosmological
constant. We find that the renormalisation of $c$ from the energy of the
inflationary ... | [
{
"created": "Mon, 13 May 2024 19:43:50 GMT",
"version": "v1"
}
] | 2024-05-15 | [
[
"Brax",
"P.",
""
],
[
"Vanhove",
"P.",
""
]
] | We consider the single-parameter $\mathcal{R}+ c\mathcal{R}^2$ gravitational action and use constraints from astrophysics and the laboratory to derive a natural relation between the coefficient $c$ and the value of the cosmological constant. We find that the renormalisation of $c$ from the energy of the inflationary ph... |
1705.09010 | James Scargill | James H. C. Scargill | Barnacles and Gravity | 31 pages, 11 figures | JHEP 09 (2017) 080 | 10.1007/JHEP09(2017)080 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theories with more than one vacuum allow quantum transitions between them,
which may proceed via bubble nucleation; theories with more than two vacua
posses additional decay modes in which the wall of a bubble may further decay.
The instantons which mediate such a process have $O(3)$ symmetry (in four
dimensions, rat... | [
{
"created": "Thu, 25 May 2017 01:00:14 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Sep 2017 00:35:37 GMT",
"version": "v2"
}
] | 2017-09-25 | [
[
"Scargill",
"James H. C.",
""
]
] | Theories with more than one vacuum allow quantum transitions between them, which may proceed via bubble nucleation; theories with more than two vacua posses additional decay modes in which the wall of a bubble may further decay. The instantons which mediate such a process have $O(3)$ symmetry (in four dimensions, rathe... |
1711.00290 | Petya Nedkova | Boian Lazov, Petya Nedkova, Stoytcho Yazadjiev | Uniqueness theorem for static phantom wormholes in
Einstein-Maxwell-dilaton theory | 12 pages | null | 10.1016/j.physletb.2018.01.059 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove a uniqueness theorem for traversable wormhole solutions in the
Einstein-Maxwell-dilaton gravity with a phantom scalar field and a possible
phantom electromagnetic field. In a certain region of the parameter space,
determined by the asymptotic values of the scalar field and the lapse function,
the regular wor... | [
{
"created": "Wed, 1 Nov 2017 11:18:17 GMT",
"version": "v1"
}
] | 2018-02-07 | [
[
"Lazov",
"Boian",
""
],
[
"Nedkova",
"Petya",
""
],
[
"Yazadjiev",
"Stoytcho",
""
]
] | We prove a uniqueness theorem for traversable wormhole solutions in the Einstein-Maxwell-dilaton gravity with a phantom scalar field and a possible phantom electromagnetic field. In a certain region of the parameter space, determined by the asymptotic values of the scalar field and the lapse function, the regular wormh... |
2103.16924 | Yong Xiao | Yong Xiao | The holographic state of matter and its implications for quantum gravity | 6 pages, Essay written for the 2021 Gravity Research Foundation Essay
Competition | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The holographic state of matter exists in the quantum gravitational regime,
with black holes as the example. In this essay, we provide a microscopic
derivation to the holographic thermodynamics and further discuss its
implications for quantum gravity. Especially, we establish the link between
holographic entropy and ... | [
{
"created": "Wed, 31 Mar 2021 09:23:03 GMT",
"version": "v1"
}
] | 2021-04-01 | [
[
"Xiao",
"Yong",
""
]
] | The holographic state of matter exists in the quantum gravitational regime, with black holes as the example. In this essay, we provide a microscopic derivation to the holographic thermodynamics and further discuss its implications for quantum gravity. Especially, we establish the link between holographic entropy and di... |
1702.02921 | Xiang-Song Chen | Tao Lei, Zi-Wei Chen, Zhen-Lai Wang, and Xiang-Song Chen | Gravitational Coupling from Active Gravity | 12 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We attempt to construct a gravitational coupling by pre-selecting an
energy-momentum tensor as the source for gravitational field. The
energy-momentum tensor we take is a recently derived new expression motivated
by joint localization of energy and momentum in quantum measurement. This
energy-momentum tensor differs ... | [
{
"created": "Thu, 9 Feb 2017 18:08:20 GMT",
"version": "v1"
}
] | 2017-02-10 | [
[
"Lei",
"Tao",
""
],
[
"Chen",
"Zi-Wei",
""
],
[
"Wang",
"Zhen-Lai",
""
],
[
"Chen",
"Xiang-Song",
""
]
] | We attempt to construct a gravitational coupling by pre-selecting an energy-momentum tensor as the source for gravitational field. The energy-momentum tensor we take is a recently derived new expression motivated by joint localization of energy and momentum in quantum measurement. This energy-momentum tensor differs fr... |
1303.6222 | Xi\'an O. Camanho | Xian O. Camanho | Phase transitions in general gravity theories | 4 pages, 1 figure, Contribution to the Conference Proceedings of the
Spanish Relativity Meeting in Portugal (ERE2012) | null | 10.1007/978-3-642-40157-2_18 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Phase transitions between two competing vacua of a given theory are quite
common in physics. We discuss how to construct the space-time solutions that
allow the description of phase transitions between different branches (or
asymptotics) of a given higher curvature gravity theory at finite temperature.
| [
{
"created": "Mon, 25 Mar 2013 17:29:04 GMT",
"version": "v1"
}
] | 2015-08-26 | [
[
"Camanho",
"Xian O.",
""
]
] | Phase transitions between two competing vacua of a given theory are quite common in physics. We discuss how to construct the space-time solutions that allow the description of phase transitions between different branches (or asymptotics) of a given higher curvature gravity theory at finite temperature. |
1006.2369 | Mercedes Martin-Benito | Mercedes Mart\'in-Benito, Guillermo A. Mena Marug\'an, and Edward
Wilson-Ewing | Hybrid Quantization: From Bianchi I to the Gowdy Model | 20 pages, version accepted for publication in Physical Review D | Phys.Rev.D82:084012,2010 | 10.1103/PhysRevD.82.084012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Gowdy cosmologies are vacuum solutions to the Einstein equations which
possess two space-like Killing vectors and whose spatial sections are compact.
We consider the simplest of these cosmological models: the case where the
spatial topology is that of a three-torus and the gravitational waves are
linearly polariz... | [
{
"created": "Fri, 11 Jun 2010 19:10:48 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Sep 2010 10:18:35 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Martín-Benito",
"Mercedes",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Wilson-Ewing",
"Edward",
""
]
] | The Gowdy cosmologies are vacuum solutions to the Einstein equations which possess two space-like Killing vectors and whose spatial sections are compact. We consider the simplest of these cosmological models: the case where the spatial topology is that of a three-torus and the gravitational waves are linearly polarized... |
2010.15282 | Patrick Godwin | Patrick Godwin, Reed Essick, Chad Hanna, Kipp Cannon, Sarah Caudill,
Chiwai Chan, Jolien D. E. Creighton, Heather Fong, Erik Katsavounidis, Ryan
Magee, Duncan Meacher, Cody Messick, Soichiro Morisaki, Debnandini Mukherjee,
Hiroaki Ohta, Alexander Pace, Iris de Ruiter, Surabhi Sachdev, Leo Tsukada,
Takuya Tsutsu... | Incorporation of Statistical Data Quality Information into the GstLAL
Search Analysis | 8 pages, 5 figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present updates to GstLAL, a matched filter gravitational-wave search
pipeline, in Advanced LIGO and Virgo's third observing run. We discuss the
incorporation of statistical data quality information into GstLAL's
multi-dimensional likelihood ratio ranking statistic and additional
improvements to search for gravita... | [
{
"created": "Wed, 28 Oct 2020 23:38:38 GMT",
"version": "v1"
}
] | 2020-10-30 | [
[
"Godwin",
"Patrick",
""
],
[
"Essick",
"Reed",
""
],
[
"Hanna",
"Chad",
""
],
[
"Cannon",
"Kipp",
""
],
[
"Caudill",
"Sarah",
""
],
[
"Chan",
"Chiwai",
""
],
[
"Creighton",
"Jolien D. E.",
""
],
[
"... | We present updates to GstLAL, a matched filter gravitational-wave search pipeline, in Advanced LIGO and Virgo's third observing run. We discuss the incorporation of statistical data quality information into GstLAL's multi-dimensional likelihood ratio ranking statistic and additional improvements to search for gravitati... |
2311.07651 | Tjarda Boekholt | Tjarda C. N. Boekholt and Simon F. Portegies Zwart | Gargantuan chaotic gravitational three-body systems II. Dependence on
angular momentum and astrophysical scale | 13 pages, 11 figures, 2 tables. Submitted to MNRAS | null | null | null | gr-qc astro-ph.CO astro-ph.EP astro-ph.IM nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently we estimated that about 5 percent of supermassive black hole triple
systems are fundamentally unpredictable. These gargantuan chaotic systems are
able to exponentially magnify Planck length perturbations to astronomical
scales within their interaction timescale. These results were obtained in the
zero angula... | [
{
"created": "Mon, 13 Nov 2023 19:00:02 GMT",
"version": "v1"
}
] | 2023-11-15 | [
[
"Boekholt",
"Tjarda C. N.",
""
],
[
"Zwart",
"Simon F. Portegies",
""
]
] | Recently we estimated that about 5 percent of supermassive black hole triple systems are fundamentally unpredictable. These gargantuan chaotic systems are able to exponentially magnify Planck length perturbations to astronomical scales within their interaction timescale. These results were obtained in the zero angular ... |
gr-qc/0006042 | Michael T. Anderson | Michael T. Anderson (SUNY Stony Brook) | On long-time evolution in general relativity and geometrization of
3-manifolds | 36pp | Commun.Math.Phys. 222 (2001) 533-567 | 10.1007/s002200100527 | null | gr-qc math.DG | null | We describe some relations between the long-time asymptotic behavior of the
vacuum Einstein evolution equations and the geometrization of 3-manifolds.
These relations are expressed in terms of evolution of CMC hypersurfaces in the
vacuum space-time.Some results are also obtained on the singularity avoidance
of CMC fo... | [
{
"created": "Mon, 12 Jun 2000 17:48:33 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Anderson",
"Michael T.",
"",
"SUNY Stony Brook"
]
] | We describe some relations between the long-time asymptotic behavior of the vacuum Einstein evolution equations and the geometrization of 3-manifolds. These relations are expressed in terms of evolution of CMC hypersurfaces in the vacuum space-time.Some results are also obtained on the singularity avoidance of CMC foli... |
gr-qc/9709039 | Robert Mann | R.B. Mann | Topological Black Holes -- Outside Looking In | 35 pages, LaTeX, 15 figures | null | null | WATPHYS TH-97/12 | gr-qc | null | I describe the general mathematical construction and physical picture of
topological black holes, which are black holes whose event horizons are
surfaces of non-trivial topology. The construction is carried out in an
arbitrary number of dimensions, and includes all known special cases which have
appeared before in th... | [
{
"created": "Mon, 15 Sep 1997 16:13:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mann",
"R. B.",
""
]
] | I describe the general mathematical construction and physical picture of topological black holes, which are black holes whose event horizons are surfaces of non-trivial topology. The construction is carried out in an arbitrary number of dimensions, and includes all known special cases which have appeared before in the ... |
0806.4180 | Eyo Ita III | Eyo Eyo Ita III | Instanton representanton of Plebanski gravity. Gravitational coherent
states | 26 pages | Hadronic Journal, Vol 33, No. 2 (2010) p.197 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we show that the instanton representation of Plebanski gravity
exhibits a Hilbert space of harmonic oscillator-like coherent states. We put in
place the formalism and carry out the construction of the states, and we
elucidate on their physical interpretation. Additionally, we provide an
invertible map b... | [
{
"created": "Wed, 25 Jun 2008 19:50:24 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jun 2008 11:11:03 GMT",
"version": "v2"
},
{
"created": "Thu, 13 May 2010 19:02:31 GMT",
"version": "v3"
},
{
"created": "Fri, 11 Feb 2011 15:36:06 GMT",
"version": "v4"
}
] | 2012-02-20 | [
[
"Ita",
"Eyo Eyo",
"III"
]
] | In this paper we show that the instanton representation of Plebanski gravity exhibits a Hilbert space of harmonic oscillator-like coherent states. We put in place the formalism and carry out the construction of the states, and we elucidate on their physical interpretation. Additionally, we provide an invertible map bet... |
2203.03672 | Hao-Jui Kuan | Hao-Jui Kuan, Arthur G. Suvorov, Daniela D. Doneva, Stoytcho S.
Yazadjiev | Gravitational waves from accretion-induced descalarization in massive
scalar-tensor theory | 11 pages, 9 figures, 1 table. Accepted for publication in Physical
Review Letters | null | 10.1103/PhysRevLett.129.121104 | ET-0034A-22 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many classes of extended scalar-tensor theories predict that dynamical
instabilities can take place at high energies, leading to the formation of
scalarized neutron stars. Depending on the theory parameters, stars in a
scalarized state can form a solution-space branch that shares a lot of
similarities with the so-cal... | [
{
"created": "Mon, 7 Mar 2022 19:11:07 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Aug 2022 16:21:31 GMT",
"version": "v2"
}
] | 2022-10-05 | [
[
"Kuan",
"Hao-Jui",
""
],
[
"Suvorov",
"Arthur G.",
""
],
[
"Doneva",
"Daniela D.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | Many classes of extended scalar-tensor theories predict that dynamical instabilities can take place at high energies, leading to the formation of scalarized neutron stars. Depending on the theory parameters, stars in a scalarized state can form a solution-space branch that shares a lot of similarities with the so-calle... |
2202.06536 | Spiros Cotsakis | Spiros Cotsakis, Ifigeneia Klaoudatou, Georgios Kolionis, John
Miritzis, Dimitrios Trachilis | The conformal cosmological potential | v2: 39 pages, more references added, matches version to appear in the
inaugural issue of new mdpi journal `Astronomy' | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss qualitative features of the conformal relation between certain
classes of gravity theories and general relativity, common to different themes
such as $f(R)$, Brans-Dicke-type, and string theories. We focus primarily on
the frame relations of the fields involved, slice energy, traceless and
Palatini extensi... | [
{
"created": "Mon, 14 Feb 2022 08:15:26 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Apr 2022 11:22:57 GMT",
"version": "v2"
}
] | 2022-04-05 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Klaoudatou",
"Ifigeneia",
""
],
[
"Kolionis",
"Georgios",
""
],
[
"Miritzis",
"John",
""
],
[
"Trachilis",
"Dimitrios",
""
]
] | We discuss qualitative features of the conformal relation between certain classes of gravity theories and general relativity, common to different themes such as $f(R)$, Brans-Dicke-type, and string theories. We focus primarily on the frame relations of the fields involved, slice energy, traceless and Palatini extension... |
1011.2210 | Yosef Zlochower | Yosef Zlochower, Manuela Campanelli, Carlos O. Lousto | Modeling Gravitational Recoil Using Numerical Relativity | corrections to text, 11 pages, 1 figure | Class.Quant.Grav.28:114015,2011 | 10.1088/0264-9381/28/11/114015 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the developments in modeling gravitational recoil from merging
black-hole binaries and introduce a new set of 20 simulations to test our
previously proposed empirical formula for the recoil. The configurations are
chosen to represent generic binaries with unequal masses and precessing spins.
Results of thes... | [
{
"created": "Tue, 9 Nov 2010 21:02:34 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Nov 2010 16:24:57 GMT",
"version": "v2"
}
] | 2011-06-24 | [
[
"Zlochower",
"Yosef",
""
],
[
"Campanelli",
"Manuela",
""
],
[
"Lousto",
"Carlos O.",
""
]
] | We review the developments in modeling gravitational recoil from merging black-hole binaries and introduce a new set of 20 simulations to test our previously proposed empirical formula for the recoil. The configurations are chosen to represent generic binaries with unequal masses and precessing spins. Results of these ... |
2004.02654 | Gabriel Andres Piovano | Gabriel Andres Piovano, Andrea Maselli, Paolo Pani | Extreme mass ratio inspirals with spinning secondary: a detailed study
of equatorial circular motion | Improvements in response to referee reports. Typos corrected. Longer
companion paper of arXiv:2003.08448. Data and code available at the website
https://web.uniroma1.it/gmunu | Phys. Rev. D 102, 024041 (2020) | 10.1103/PhysRevD.102.024041 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extreme mass-ratio inspirals detectable by the future Laser Interferometer
Space Antenna provide a unique way to test general relativity and fundamental
physics. Motivated by this possibility, here we study in detail the EMRI
dynamics in the presence of a spinning secondary, collecting and extending
various results t... | [
{
"created": "Mon, 6 Apr 2020 13:20:43 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jun 2020 19:47:47 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"Piovano",
"Gabriel Andres",
""
],
[
"Maselli",
"Andrea",
""
],
[
"Pani",
"Paolo",
""
]
] | Extreme mass-ratio inspirals detectable by the future Laser Interferometer Space Antenna provide a unique way to test general relativity and fundamental physics. Motivated by this possibility, here we study in detail the EMRI dynamics in the presence of a spinning secondary, collecting and extending various results tha... |
1010.2535 | Tomas Andrade | Tomas Andrade, Donald Marolf, Cedric Deffayet | Can Hamiltonians be boundary observables in Parametrized Field Theories? | 28 pages, LaTeX, references added, citations clarified, typos
corrected | Class.Quant.Grav.28:105002,2011 | 10.1088/0264-9381/28/10/105002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been argued that holography in gravitational theories is related to
the existence of a particularly useful Gauss Law that allows energy to be
measured at the boundary. The present work investigates the extent to which
such Gauss Laws follow from diffeomorphism invariance. We study parametrized
field theories, ... | [
{
"created": "Tue, 12 Oct 2010 23:28:05 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Oct 2010 18:39:46 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Nov 2010 20:00:13 GMT",
"version": "v3"
}
] | 2011-04-11 | [
[
"Andrade",
"Tomas",
""
],
[
"Marolf",
"Donald",
""
],
[
"Deffayet",
"Cedric",
""
]
] | It has been argued that holography in gravitational theories is related to the existence of a particularly useful Gauss Law that allows energy to be measured at the boundary. The present work investigates the extent to which such Gauss Laws follow from diffeomorphism invariance. We study parametrized field theories, wh... |
gr-qc/0207049 | Giovanni Amelino-Camelia | Giovanni Amelino-Camelia | Doubly Special Relativity | Invited piece for the N&V section of Nature. 5 pages, LaTex | Nature 418:34-35,2002 | 10.1038/418034a | null | gr-qc | null | I give a short non-technical review of the results obtained in recent work on
"Doubly Special Relativity", the relativistic theories in which the
rotation/boost transformations between inertial observers are characterized by
two observer-independent scales (the familiar velocity scale, $c$, and a new
observer-indepen... | [
{
"created": "Fri, 12 Jul 2002 02:08:57 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Amelino-Camelia",
"Giovanni",
""
]
] | I give a short non-technical review of the results obtained in recent work on "Doubly Special Relativity", the relativistic theories in which the rotation/boost transformations between inertial observers are characterized by two observer-independent scales (the familiar velocity scale, $c$, and a new observer-independe... |
0707.4526 | Hao Wei | Hao Wei, Rong-Gen Cai | Statefinder Diagnostic and w-w' Analysis for the Agegraphic Dark Energy
Models without and with Interaction | 11 pages, 4 figures, Latex2e; v2: Phys. Lett. B in press; v3:
published version | Phys.Lett.B655:1-6,2007 | 10.1016/j.physletb.2007.08.066 | null | gr-qc astro-ph hep-th | null | A new dark energy model, named as ``agegraphic dark energy'', has been
proposed by one of us (R. G. Cai) in arXiv:0707.4049, based on the
K\'{a}rolyh\'{a}zy uncertainty relation, which arises from the quantum
mechanics together with general relativity. Then, in arXiv:0707.4052, it has
been extended by including the i... | [
{
"created": "Tue, 31 Jul 2007 14:59:50 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Aug 2007 15:58:22 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Oct 2007 18:01:10 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Wei",
"Hao",
""
],
[
"Cai",
"Rong-Gen",
""
]
] | A new dark energy model, named as ``agegraphic dark energy'', has been proposed by one of us (R. G. Cai) in arXiv:0707.4049, based on the K\'{a}rolyh\'{a}zy uncertainty relation, which arises from the quantum mechanics together with general relativity. Then, in arXiv:0707.4052, it has been extended by including the int... |
0704.3888 | Farook Rahaman | F.Rahaman, K.Maity, P.Ghosh and K.Gayen | Gravitational field of a higher dimensional global monopole in Lyra
geometry | 7 pages. Published in Bulletin of the Gauhati University Mathematics
Association 8, 82 (2004) | Bulletin of the Gauhati University Mathematics Association 8, 82
(2004) | null | null | gr-qc | null | We present a five dimensional global monopole within the framework of Lyra
geometry. Also the gravitational field of the monopole solution has been
considered.
| [
{
"created": "Mon, 30 Apr 2007 07:09:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rahaman",
"F.",
""
],
[
"Maity",
"K.",
""
],
[
"Ghosh",
"P.",
""
],
[
"Gayen",
"K.",
""
]
] | We present a five dimensional global monopole within the framework of Lyra geometry. Also the gravitational field of the monopole solution has been considered. |
1511.09084 | Reiko Toriumi | Thomas Krajewski, Reiko Toriumi | Polchinski's exact renormalisation group for tensorial theories:
Gaussian universality and power counting | 22 pages, 4 figures | null | 10.1088/1751-8113/49/38/385401 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we use the exact renormalisation in the context of tensor
models and tensorial group field theories. As a byproduct, we rederive Gaussian
universality for random tensors and provide a general power counting for
Abelian tensorial field theories with a closure constraint, leading us to a
only five renorm... | [
{
"created": "Sun, 29 Nov 2015 20:24:35 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Feb 2016 01:17:03 GMT",
"version": "v2"
}
] | 2016-09-21 | [
[
"Krajewski",
"Thomas",
""
],
[
"Toriumi",
"Reiko",
""
]
] | In this paper, we use the exact renormalisation in the context of tensor models and tensorial group field theories. As a byproduct, we rederive Gaussian universality for random tensors and provide a general power counting for Abelian tensorial field theories with a closure constraint, leading us to a only five renormal... |
gr-qc/9812093 | null | A.Feoli, S.Rampone | Is the Strong Anthropic Principle Too Weak? | 12 pages, Latex, to appear in Il Nuovo Cimento B | Nuovo Cim. B114 (1999) 281-289 | null | null | gr-qc | null | We discuss the Carter's formula about the mankind evolution probability
following the derivation proposed by Barrow and Tipler. We stress the relation
between the existence of billions of galaxies and the evolution of at least one
intelligent life, whose living time is not trivial, all over the Universe. We
show that... | [
{
"created": "Wed, 30 Dec 1998 11:58:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Feoli",
"A.",
""
],
[
"Rampone",
"S.",
""
]
] | We discuss the Carter's formula about the mankind evolution probability following the derivation proposed by Barrow and Tipler. We stress the relation between the existence of billions of galaxies and the evolution of at least one intelligent life, whose living time is not trivial, all over the Universe. We show that t... |
1309.1141 | Fan Zhang | Fan Zhang and B\'ela Szil\'agyi | A joint approach for reducing eccentricity and spurious gravitational
radiation in binary black hole initial data construction | 13 pages, 14 figures | Phys. Rev. D 88, 084033 (2013) | 10.1103/PhysRevD.88.084033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | At the beginning of binary black hole simulations, there is a pulse of
spurious radiation (or junk radiation) resulting from the initial data not
matching astrophysical quasi-equilibrium inspiral exactly. One traditionally
waits for the junk radiation to exit the computational domain before taking
physical readings, ... | [
{
"created": "Wed, 4 Sep 2013 19:16:53 GMT",
"version": "v1"
}
] | 2013-10-24 | [
[
"Zhang",
"Fan",
""
],
[
"Szilágyi",
"Béla",
""
]
] | At the beginning of binary black hole simulations, there is a pulse of spurious radiation (or junk radiation) resulting from the initial data not matching astrophysical quasi-equilibrium inspiral exactly. One traditionally waits for the junk radiation to exit the computational domain before taking physical readings, at... |
2007.14683 | Roberto Ivan Cabrera Munguia Dr. | I. Cabrera-Munguia, Etevaldo dos Santos Costa Filho, H\'ector H.
Hern\'andez, David V\'azquez-Valdez | Corotating binary systems of identical Kerr-Newman black holes | 11 pages, 4 figures, published version | Physics Letters B 811 (2020) 135917 | 10.1016/j.physletb.2020.135917 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper binary configurations of identical corotating
Kerr-Newman black holes separated by a massless strut are derived and studied.
After solving the axis conditions and establishing the absence of magnetic
charges in the solution, one gets two 4-parametric corotating binary black hole
models endowed wi... | [
{
"created": "Wed, 29 Jul 2020 09:01:30 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 2020 03:30:38 GMT",
"version": "v2"
}
] | 2020-11-13 | [
[
"Cabrera-Munguia",
"I.",
""
],
[
"Filho",
"Etevaldo dos Santos Costa",
""
],
[
"Hernández",
"Héctor H.",
""
],
[
"Vázquez-Valdez",
"David",
""
]
] | In the present paper binary configurations of identical corotating Kerr-Newman black holes separated by a massless strut are derived and studied. After solving the axis conditions and establishing the absence of magnetic charges in the solution, one gets two 4-parametric corotating binary black hole models endowed with... |
2406.13270 | Shao-Wen Wei | Xu Ye, Shao-Wen Wei | Novel topological phenomena of timelike circular orbits for charged test
particles | 30 pages, 29 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The topological approach has recently been successfully employed to
investigate timelike circular orbits for massive neutral test particles. The
observed vanishing topological number implies that these timelike circular
orbits occur in pairs. However, the behavior of charged test particles in this
regard remains unex... | [
{
"created": "Wed, 19 Jun 2024 07:01:56 GMT",
"version": "v1"
}
] | 2024-06-21 | [
[
"Ye",
"Xu",
""
],
[
"Wei",
"Shao-Wen",
""
]
] | The topological approach has recently been successfully employed to investigate timelike circular orbits for massive neutral test particles. The observed vanishing topological number implies that these timelike circular orbits occur in pairs. However, the behavior of charged test particles in this regard remains unexpl... |
1704.03343 | Mark Pace | Mark Pace and Jackson Levi Said | A Perturbative Approach to Neutron Stars in $f(T, \mathcal{T})-$Gravity | arXiv admin note: text overlap with arXiv:1701.04761 | Eur. Phys. J. C (2017) 77:283 | 10.1140/epjc/s10052-017-4838-1 | EPJC-17-02-113.R1 | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a Tolman-Oppenheimer-Volkoff equation in neutron star systems
within the modified $f(T, \mathcal{T})$-gravity class of models using a
perturbative approach. In our approach $f(T, \mathcal{T})$-gravity is
considered to be a static spherically symmetric space-time. In this instance
the metric is built from a ... | [
{
"created": "Mon, 10 Apr 2017 15:07:15 GMT",
"version": "v1"
}
] | 2017-05-08 | [
[
"Pace",
"Mark",
""
],
[
"Said",
"Jackson Levi",
""
]
] | We derive a Tolman-Oppenheimer-Volkoff equation in neutron star systems within the modified $f(T, \mathcal{T})$-gravity class of models using a perturbative approach. In our approach $f(T, \mathcal{T})$-gravity is considered to be a static spherically symmetric space-time. In this instance the metric is built from a mo... |
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