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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0911.2189 | Lorenzo Iorio | Lorenzo Iorio | Anthropic constraints on the cosmological constant from Sun's motion
through the Milky Way | LaTex2e, 3 tables, no figures, 5 pages. Accepted by Monthly Notices
of the Royal Astronomical Society (MNRAS) | Mon.Not.Roy.Astron.Soc.403:1469 - 1473,2010 | 10.1111/j.1365-2966.2010.16212.x | null | gr-qc astro-ph.GA hep-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We tentatively look at anthropic constraints on the Cosmological Constant
(CC) \Lambda at galactic scales by investigating its influence on the motion of
the Sun throughout the Milky Way (MW) for -4.5 <= t <=0 Gyr. In particular, we
look at the Galactocentric distance at which the Sun is displaced at the end of
the n... | [
{
"created": "Wed, 11 Nov 2009 17:32:55 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 2009 14:17:22 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Dec 2009 16:57:21 GMT",
"version": "v3"
}
] | 2010-04-08 | [
[
"Iorio",
"Lorenzo",
""
]
] | We tentatively look at anthropic constraints on the Cosmological Constant (CC) \Lambda at galactic scales by investigating its influence on the motion of the Sun throughout the Milky Way (MW) for -4.5 <= t <=0 Gyr. In particular, we look at the Galactocentric distance at which the Sun is displaced at the end of the num... |
2007.15384 | Lode Wylleman | Lode Wylleman, L. Filipe O. Costa and Jos\'e Nat\'ario | Poynting vector, super-Poynting vector, and principal observers in
electromagnetism and general relativity | 42 pages, 6 figures. Minor improvements, typos corrected, references
added. Matches the final published version | Class. Quantum Grav. 38 (2021) 165009 | 10.1088/1361-6382/abfd93 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In electromagnetism, the concept of Poynting vector as measured by an
observer is well known. A mathematical analogue in general relativity is the
super-Poynting vector of the Weyl tensor. Observers for which the
(super-)Poynting vector vanishes are called principal. When, at a given point,
the electromagnetic field ... | [
{
"created": "Thu, 30 Jul 2020 11:21:51 GMT",
"version": "v1"
},
{
"created": "Thu, 27 May 2021 21:12:22 GMT",
"version": "v2"
}
] | 2021-08-20 | [
[
"Wylleman",
"Lode",
""
],
[
"Costa",
"L. Filipe O.",
""
],
[
"Natário",
"José",
""
]
] | In electromagnetism, the concept of Poynting vector as measured by an observer is well known. A mathematical analogue in general relativity is the super-Poynting vector of the Weyl tensor. Observers for which the (super-)Poynting vector vanishes are called principal. When, at a given point, the electromagnetic field is... |
1504.07519 | Sumanta Chakraborty | Sumanta Chakraborty and Soumitra SenGupta | Effective field equation on m-brane embedded in n-dimensional bulk of
Einstein and f(R) gravity | v2, Revised, Accepted in EPJC, 35 pages, no figures | Eur. Phys. J. C 75, 538 (2015) | 10.1140/epjc/s10052-015-3768-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have derived effective gravitational field equations on a lower
dimensional hypersurface (known as a brane), placed in a higher dimensional
bulk spacetime for both Einstein and $f(\mathcal{R})$ gravity theories. We have
started our analysis on $n$-dimensional bulk from which the effective field
equations on a $(n-... | [
{
"created": "Mon, 27 Apr 2015 11:00:36 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Oct 2015 00:55:51 GMT",
"version": "v2"
}
] | 2015-11-24 | [
[
"Chakraborty",
"Sumanta",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | We have derived effective gravitational field equations on a lower dimensional hypersurface (known as a brane), placed in a higher dimensional bulk spacetime for both Einstein and $f(\mathcal{R})$ gravity theories. We have started our analysis on $n$-dimensional bulk from which the effective field equations on a $(n-1)... |
gr-qc/9704013 | Fotini Markopoulou | Fotini Markopoulou | Dual formulation of spin network evolution | Latex, 20 pages, 16 figures | null | null | null | gr-qc | null | We illustrate the relationship between spin networks and their dual
representation by labelled triangulations of space in 2+1 and 3+1 dimensions.
We apply this to the recent proposal for causal evolution of spin networks. The
result is labelled spatial triangulations evolving with transition amplitudes
given by label... | [
{
"created": "Sun, 6 Apr 1997 13:48:04 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Markopoulou",
"Fotini",
""
]
] | We illustrate the relationship between spin networks and their dual representation by labelled triangulations of space in 2+1 and 3+1 dimensions. We apply this to the recent proposal for causal evolution of spin networks. The result is labelled spatial triangulations evolving with transition amplitudes given by labelle... |
1509.02248 | Rhondale Tso | Rhondale Tso, Michele Zanolin | Measuring violations of General Relativity from single gravitational
wave detection by non-spinning binary systems: higher-order asymptotic
analysis | 15 pages, 9 figures | Phys. Rev. D 93, 124033 (2016) | 10.1103/PhysRevD.93.124033 | LIGO-P1500144 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A frequentist asymptotic expansion method for error estimation is employed
for a network of gravitational wave detectors to assess the amount of
information that can be extracted from gravitational wave observations.
Mathematically we derive lower bounds in the errors that any parameter
estimator will have in the abs... | [
{
"created": "Tue, 8 Sep 2015 03:47:50 GMT",
"version": "v1"
},
{
"created": "Tue, 24 May 2016 17:25:29 GMT",
"version": "v2"
}
] | 2016-06-22 | [
[
"Tso",
"Rhondale",
""
],
[
"Zanolin",
"Michele",
""
]
] | A frequentist asymptotic expansion method for error estimation is employed for a network of gravitational wave detectors to assess the amount of information that can be extracted from gravitational wave observations. Mathematically we derive lower bounds in the errors that any parameter estimator will have in the absen... |
1705.07082 | Ivan Agullo | Ivan Agullo, Adrian del Rio, and Jose Navarro-Salas | Gravity and handedness of photons | First Award in the 2017 Essay Competition of the Gravity Research
Foundation | null | 10.1142/S0218271817420019 | LSU-REL-190517 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vacuum fluctuations of quantum fields are altered in presence of a strong
gravitational background, with important physical consequences. We argue that a
non-trivial spacetime geometry can act as an optically active medium for
quantum electromagnetic radiation, in such a way that the state of polarization
of radiatio... | [
{
"created": "Fri, 19 May 2017 16:36:54 GMT",
"version": "v1"
}
] | 2017-11-22 | [
[
"Agullo",
"Ivan",
""
],
[
"del Rio",
"Adrian",
""
],
[
"Navarro-Salas",
"Jose",
""
]
] | Vacuum fluctuations of quantum fields are altered in presence of a strong gravitational background, with important physical consequences. We argue that a non-trivial spacetime geometry can act as an optically active medium for quantum electromagnetic radiation, in such a way that the state of polarization of radiation ... |
2203.14969 | Kimet Jusufi | Kimet Jusufi, Mustapha Azreg-A\"inou, Mubasher Jamil, Qiang Wu | Equatorial and polar quasinormal modes and quasiperiodic oscillations of
quantum deformed Kerr black hole | 14 pages, published in Universe | Universe 2022, 8(4), 210 | 10.3390/universe8040210 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we focus on the relation between quasinormal modes (QNMs) and a
rotating black hole shadows. As a specific example, we consider the quantum
deformed Kerr black hole obtained via Newman--Janis--Azreg-A\"{\i}nou
algorithm. In particular, using the geometric-optics correspondence between the
parameters of ... | [
{
"created": "Mon, 28 Mar 2022 13:12:07 GMT",
"version": "v1"
}
] | 2022-03-30 | [
[
"Jusufi",
"Kimet",
""
],
[
"Azreg-Aïnou",
"Mustapha",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Wu",
"Qiang",
""
]
] | In this paper we focus on the relation between quasinormal modes (QNMs) and a rotating black hole shadows. As a specific example, we consider the quantum deformed Kerr black hole obtained via Newman--Janis--Azreg-A\"{\i}nou algorithm. In particular, using the geometric-optics correspondence between the parameters of a ... |
1010.4409 | Koji Uryu | Koji Uryu, Eric Gourgoulhon, Charalampos Markakis | Thermodynamics of magnetized binary compact objects | 21 pages, to appear in PRD | Phys.Rev.D82:104054,2010 | 10.1103/PhysRevD.82.104054 | DPUR-TH-22 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary systems of compact objects with electromagnetic field are modeled by
helically symmetric Einstein-Maxwell spacetimes with charged and magnetized
perfect fluids. Previously derived thermodynamic laws for helically-symmetric
perfect-fluid spacetimes are extended to include the electromagnetic fields,
and electri... | [
{
"created": "Thu, 21 Oct 2010 09:58:35 GMT",
"version": "v1"
}
] | 2010-12-23 | [
[
"Uryu",
"Koji",
""
],
[
"Gourgoulhon",
"Eric",
""
],
[
"Markakis",
"Charalampos",
""
]
] | Binary systems of compact objects with electromagnetic field are modeled by helically symmetric Einstein-Maxwell spacetimes with charged and magnetized perfect fluids. Previously derived thermodynamic laws for helically-symmetric perfect-fluid spacetimes are extended to include the electromagnetic fields, and electric ... |
2211.16857 | Federico De Lillo | Federico De Lillo, Jishnu Suresh, Antoine Depasse, Magdalena
Sieniawska, Andrew L. Miller and Giacomo Bruno | Probing Ensemble Properties of Vortex-avalanche Pulsar Glitches with a
Stochastic Gravitational-Wave Background Search | 16 pages, 3 figures, 1 table | null | 10.1103/PhysRevD.107.102001 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A stochastic gravitational-wave background (SGWB) is expected to be produced
by the superposition of individually undetectable, unresolved
gravitational-wave (GW) signals from cosmological and astrophysical sources.
Such a signal can be searched with dedicated techniques using the data acquired
by a network of ground... | [
{
"created": "Wed, 30 Nov 2022 09:59:58 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Apr 2023 11:07:47 GMT",
"version": "v2"
}
] | 2023-05-17 | [
[
"De Lillo",
"Federico",
""
],
[
"Suresh",
"Jishnu",
""
],
[
"Depasse",
"Antoine",
""
],
[
"Sieniawska",
"Magdalena",
""
],
[
"Miller",
"Andrew L.",
""
],
[
"Bruno",
"Giacomo",
""
]
] | A stochastic gravitational-wave background (SGWB) is expected to be produced by the superposition of individually undetectable, unresolved gravitational-wave (GW) signals from cosmological and astrophysical sources. Such a signal can be searched with dedicated techniques using the data acquired by a network of ground-b... |
1809.04715 | Carmen Li | Jerzy Lewandowski, Carmen Li | Spacetime near Kerr isolated horizon | 19 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The theory of isolated horizon provides a quasi-local framework to study the
spacetime geometry in the neighbourhood of the horizon of a black hole in
equilibrium without any reference to structures far away from the horizon.
While the geometric properties of the Kerr-(A)dS and more general algebraically
special solu... | [
{
"created": "Thu, 13 Sep 2018 00:14:32 GMT",
"version": "v1"
}
] | 2018-09-14 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Li",
"Carmen",
""
]
] | The theory of isolated horizon provides a quasi-local framework to study the spacetime geometry in the neighbourhood of the horizon of a black hole in equilibrium without any reference to structures far away from the horizon. While the geometric properties of the Kerr-(A)dS and more general algebraically special soluti... |
2009.04829 | Francisco Lobo | Roman Korolev, Francisco S. N. Lobo, Sergey V. Sushkov | Kinetic gravity braiding wormhole geometries | 10 pages, 4 figures. V2: 11 pages, section on tidal forces added.
Matches published version | Phys. Rev. D 102, 104016 (2020) | 10.1103/PhysRevD.102.104016 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An interesting class of scalar-tensor models, denoted by kinetic gravity
braiding (KGB), has recently been proposed. These models contain interactions
of the second derivatives of the scalar field that do not lead to additional
degrees of freedom and exhibit peculiar features, such as an essential mixing
of the scala... | [
{
"created": "Thu, 10 Sep 2020 13:04:40 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Nov 2020 21:01:41 GMT",
"version": "v2"
}
] | 2020-11-11 | [
[
"Korolev",
"Roman",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Sushkov",
"Sergey V.",
""
]
] | An interesting class of scalar-tensor models, denoted by kinetic gravity braiding (KGB), has recently been proposed. These models contain interactions of the second derivatives of the scalar field that do not lead to additional degrees of freedom and exhibit peculiar features, such as an essential mixing of the scalar ... |
2106.05104 | Shubhen Biswas | Shubhen Biswas | Modified gravity over the linearized metric perturbation for two body
dynamics | null | null | null | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | In this paper Modified gravity is studied over the linearized metric
perturbation in post-Minkowskian theory. This is a different aspect for two
body dynamics without taking usual self force originated from the radiative
backscattering of gravitational waves. The new multiplicative approach to
determine the backgroun... | [
{
"created": "Wed, 9 Jun 2021 14:29:11 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Jul 2021 04:32:40 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Mar 2023 09:06:04 GMT",
"version": "v3"
}
] | 2023-03-22 | [
[
"Biswas",
"Shubhen",
""
]
] | In this paper Modified gravity is studied over the linearized metric perturbation in post-Minkowskian theory. This is a different aspect for two body dynamics without taking usual self force originated from the radiative backscattering of gravitational waves. The new multiplicative approach to determine the background ... |
1109.6722 | Tomohiro Harada | Tomohiro Harada and Masashi Kimura | Collision of an object in the transition from adiabatic inspiral to
plunge around a Kerr black hole | 18 pages, no figure, accepted for publication in Physical Review D,
typos corrected | Phys.Rev.D84:124032,2011 | 10.1103/PhysRevD.84.124032 | RUP-11-2, YITP-11-75 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An inspiralling object of mass $\mu$ around a Kerr black hole of mass $M (\gg
\mu)$ experiences a continuous transition near the innermost stable circular
orbit from adiabatic inspiral to plunge into the horizon as gravitational
radiation extracts its energy and angular momentum. We investigate the
collision of such ... | [
{
"created": "Fri, 30 Sep 2011 06:04:50 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Nov 2011 01:16:58 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Dec 2011 21:22:46 GMT",
"version": "v3"
}
] | 2015-05-30 | [
[
"Harada",
"Tomohiro",
""
],
[
"Kimura",
"Masashi",
""
]
] | An inspiralling object of mass $\mu$ around a Kerr black hole of mass $M (\gg \mu)$ experiences a continuous transition near the innermost stable circular orbit from adiabatic inspiral to plunge into the horizon as gravitational radiation extracts its energy and angular momentum. We investigate the collision of such an... |
2012.14049 | Alan Coley | A. A. Coley | Persistence in black hole lattice cosmological models | null | Class. Quant. Grav. 37, 245002 (2020) | 10.1088/1361-6382/abbf31 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Dynamical solutions for an evolving multiple network of black holes near a
cosmological bounce dominated by a scalar field are investigated. In
particular, we consider the class of black hole lattice models in a
hyperspherical cosmology, and we focus on the special case of eight
regularly-spaced black holes with equa... | [
{
"created": "Mon, 28 Dec 2020 01:11:36 GMT",
"version": "v1"
}
] | 2021-01-06 | [
[
"Coley",
"A. A.",
""
]
] | Dynamical solutions for an evolving multiple network of black holes near a cosmological bounce dominated by a scalar field are investigated. In particular, we consider the class of black hole lattice models in a hyperspherical cosmology, and we focus on the special case of eight regularly-spaced black holes with equal ... |
gr-qc/9403047 | null | L.Diosi, N.Gisin, J.J.Halliwell and I.G.Percival | Decoherent Histories and Quantum State Diffusion | 11 pages (plain Tex), Imperial College preprint 93-94/25 | Phys.Rev.Lett. 74 (1995) 203-207 | 10.1103/PhysRevLett.74.203 | null | gr-qc cond-mat hep-th | null | We demonstrate a close connection between the decoherent histories (DH)
approach to quantum mechanics and the quantum state diffusion (QSD) picture,
for open quantum systems described by a master equation of Lindblad form. The
(physically unique) set of variables that localize in the QSD picture also
define an approx... | [
{
"created": "Sat, 26 Mar 1994 15:20:28 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Diosi",
"L.",
""
],
[
"Gisin",
"N.",
""
],
[
"Halliwell",
"J. J.",
""
],
[
"Percival",
"I. G.",
""
]
] | We demonstrate a close connection between the decoherent histories (DH) approach to quantum mechanics and the quantum state diffusion (QSD) picture, for open quantum systems described by a master equation of Lindblad form. The (physically unique) set of variables that localize in the QSD picture also define an approxim... |
1010.0549 | Nijo Varghese Mr. | Nijo Varghese and V C Kuriakose | Evolution of electromagnetic and Dirac perturbations around a black hole
in Horava gravity | The article was fully rewritten, references added, to appear in MPLA | Mod.Phys.Lett.A26:1645-1656,2011 | 10.1142/S0217732311035936 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evolution of electromagnetic and Dirac perturbations in the spacetime
geometry of Kehagias-Sfetsos(KS) black hole in the deformed Horava-Lifshitz(HL)
gravity is investigated and the associated quasinormal modes are evaluated
using time domain integration and WKB methods. We find a considerable deviation
in the na... | [
{
"created": "Mon, 4 Oct 2010 11:38:38 GMT",
"version": "v1"
},
{
"created": "Mon, 16 May 2011 09:14:56 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Varghese",
"Nijo",
""
],
[
"Kuriakose",
"V C",
""
]
] | The evolution of electromagnetic and Dirac perturbations in the spacetime geometry of Kehagias-Sfetsos(KS) black hole in the deformed Horava-Lifshitz(HL) gravity is investigated and the associated quasinormal modes are evaluated using time domain integration and WKB methods. We find a considerable deviation in the natu... |
1006.2451 | Etera R. Livine | Enrique F. Borja, Jacobo Diaz-Polo, I\~naki Garay, Etera R. Livine | Dynamics for a 2-vertex Quantum Gravity Model | 28 pages, v2: typos corrected | Class.Quant.Grav.27:235010,2010 | 10.1088/0264-9381/27/23/235010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the recently introduced U(N) framework for loop quantum gravity to
study the dynamics of spin network states on the simplest class of graphs: two
vertices linked with an arbitrary number N of edges. Such graphs represent two
regions, in and out, separated by a boundary surface. We study the algebraic
structure... | [
{
"created": "Sat, 12 Jun 2010 10:00:24 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jun 2010 14:26:33 GMT",
"version": "v2"
}
] | 2011-03-28 | [
[
"Borja",
"Enrique F.",
""
],
[
"Diaz-Polo",
"Jacobo",
""
],
[
"Garay",
"Iñaki",
""
],
[
"Livine",
"Etera R.",
""
]
] | We use the recently introduced U(N) framework for loop quantum gravity to study the dynamics of spin network states on the simplest class of graphs: two vertices linked with an arbitrary number N of edges. Such graphs represent two regions, in and out, separated by a boundary surface. We study the algebraic structure o... |
1701.03446 | George E. A. Matsas Professor | Gabriel Cozzella, Andre G. S. Landulfo, George E. A. Matsas, and
Daniel A. T. Vanzella | Proposal for observing the Unruh effect with classical electrodynamics | Same as published version except for minor stylistic differences. 7
pages and 2 figures, including Supplemental Material. Title distinct from the
original one to comply with editorial request. Overall, original and
published versions are the same | Phys. Rev. Lett. 118, 161102 (2017) | 10.1103/PhysRevLett.118.161102 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Unruh effect -- according to which linearly accelerated observers with
proper acceleration a= constant in the (no-particle) vacuum state of inertial
observers experience a thermal bath of particles with temperature $T_U = a
\hbar / (2 \pi k_B c)$ -- has just completed its 40$^{th}$ anniversary. A
'direct' experim... | [
{
"created": "Thu, 12 Jan 2017 18:30:31 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Apr 2017 19:32:05 GMT",
"version": "v2"
}
] | 2017-04-26 | [
[
"Cozzella",
"Gabriel",
""
],
[
"Landulfo",
"Andre G. S.",
""
],
[
"Matsas",
"George E. A.",
""
],
[
"Vanzella",
"Daniel A. T.",
""
]
] | The Unruh effect -- according to which linearly accelerated observers with proper acceleration a= constant in the (no-particle) vacuum state of inertial observers experience a thermal bath of particles with temperature $T_U = a \hbar / (2 \pi k_B c)$ -- has just completed its 40$^{th}$ anniversary. A 'direct' experimen... |
1611.00076 | Adam Rogers | Adam Rogers | Gravitational lensing by compact objects within plasma | 8 pages, 2 figures. Summary of an invited parallel session talk given
in the GL3 session at the 14th Marcel Grossmann meeting, University of Rome
"La Sapienza", Rome, July 12-18, 2015. For more details, see A. Rogers, 2015,
MNRAS, 451, 1, 17-25 | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Frequency-dependent gravitational lens effects are found for trajectories of
electromagnetic rays passing through a distribution of plasma near a massive
object. Ray propagation through plasma adds extra terms to the equations of
motion that depend on the plasma refractive index. For low-frequency rays these
refracti... | [
{
"created": "Mon, 31 Oct 2016 23:03:12 GMT",
"version": "v1"
}
] | 2016-11-02 | [
[
"Rogers",
"Adam",
""
]
] | Frequency-dependent gravitational lens effects are found for trajectories of electromagnetic rays passing through a distribution of plasma near a massive object. Ray propagation through plasma adds extra terms to the equations of motion that depend on the plasma refractive index. For low-frequency rays these refractive... |
gr-qc/0511124 | Matej Pavsic | Matej Pavsic | Spin Gauge Theory of Gravity in Clifford Space | 9 pages, talk presented at the QG05 conference, 12-16 September 2005,
Cala Gonone, Italy | J.Phys.Conf.Ser.33:422-427,2006 | 10.1088/1742-6596/33/1/053 | null | gr-qc | null | A theory in which 16-dimensional curved Clifford space (C-space) provides a
realization of Kaluza-Klein theory is investigated. No extra dimensions of
spacetime are needed: "extra dimensions" are in C-space. We explore the spin
gauge theory in C-space and show that the generalized spin connection contains
the usual 4... | [
{
"created": "Wed, 23 Nov 2005 11:46:57 GMT",
"version": "v1"
}
] | 2011-08-17 | [
[
"Pavsic",
"Matej",
""
]
] | A theory in which 16-dimensional curved Clifford space (C-space) provides a realization of Kaluza-Klein theory is investigated. No extra dimensions of spacetime are needed: "extra dimensions" are in C-space. We explore the spin gauge theory in C-space and show that the generalized spin connection contains the usual 4-d... |
1509.01835 | Kaushik Bhattacharya | Kaushik Bhattacharya, Saikat Chakrabarty | Intricacies of Cosmological bounce in polynomial metric $f(R)$ gravity
for flat FLRW spacetime | 28 pages, latex file, 6 figures. The new file has minor changes. The
present manuscript is accepted for publication in JCAP | null | 10.1088/1475-7516/2016/02/030 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present the techniques for computing cosmological bounces in
polynomial $f(R)$ theories, whose order is more than two, for spatially flat
FLRW spacetime. In these cases the conformally connected Einstein frame shows
up multiple scalar potentials predicting various possibilities of cosmological
evolut... | [
{
"created": "Sun, 6 Sep 2015 17:41:27 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jan 2016 10:09:52 GMT",
"version": "v2"
}
] | 2016-02-17 | [
[
"Bhattacharya",
"Kaushik",
""
],
[
"Chakrabarty",
"Saikat",
""
]
] | In this paper we present the techniques for computing cosmological bounces in polynomial $f(R)$ theories, whose order is more than two, for spatially flat FLRW spacetime. In these cases the conformally connected Einstein frame shows up multiple scalar potentials predicting various possibilities of cosmological evolutio... |
gr-qc/0701160 | Nurettin Pirin \c{c} \c{c}io \u{g}lu | Nurettin Pirin\c{c}\c{c}io\~glu, and Ilker Sert | Differences between scalar field and scalar density solutions | 8 pages, no figures | null | 10.1139/p11-146 | null | gr-qc | null | We explore differences between scalar field, and scalar density solutions by
using Robertson-Walker (RW) metric, and also a non-relativistic Hamiltonian is
derived for a scalar density field in the post-Newtonian approximation. The
results are compared with those of scalar field. The expanding universe in RW
metric, ... | [
{
"created": "Mon, 29 Jan 2007 14:53:33 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Pirinççioglu",
"Nurettin",
""
],
[
"Sert",
"Ilker",
""
]
] | We explore differences between scalar field, and scalar density solutions by using Robertson-Walker (RW) metric, and also a non-relativistic Hamiltonian is derived for a scalar density field in the post-Newtonian approximation. The results are compared with those of scalar field. The expanding universe in RW metric, an... |
gr-qc/9903046 | Sergey V. Sushkov | Sergey V. Sushkov | Completeness principle and quantum field theory on nonglobally
hyperbolic spacetimes | revtex, Submitted to Phys. Rev. D | Grav.Cosmol. 9 (2003) 249-255 | null | null | gr-qc | null | We analyse in details the problems which one faces trying to quantize a
scalar field on the spacelike cylinder being the simple example of a spacetime
with closed timelike curves. Our analysis brings to light the fact that the
usual set of positive and negative frequency solutions of the field equation
turns out to b... | [
{
"created": "Sat, 13 Mar 1999 10:01:28 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sushkov",
"Sergey V.",
""
]
] | We analyse in details the problems which one faces trying to quantize a scalar field on the spacelike cylinder being the simple example of a spacetime with closed timelike curves. Our analysis brings to light the fact that the usual set of positive and negative frequency solutions of the field equation turns out to be ... |
1605.05217 | Stephen Adler | Stephen L. Adler | A frame-dependent gravitational effective action mimics a cosmological
constant, but modifies the black hole horizon | Latex, 5 pages. First Award Essay in the 2016 Gravity Research
Foundation essay competition. To be published in International Journal of
Modern Physics D | Int. J. Mod. Phys. D 25, 1643001 (2016) | 10.1142/S021827181643001X | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A frame dependent effective action motivated by the postulates of three-space
general coordinate invariance and Weyl scaling invariance exactly mimics a
cosmological constant in Robertson-Walker spacetimes. However, in a static
spherically symmetric Schwarzschild-like geometry it modifies the black hole
horizon struc... | [
{
"created": "Tue, 17 May 2016 15:49:52 GMT",
"version": "v1"
}
] | 2018-06-05 | [
[
"Adler",
"Stephen L.",
""
]
] | A frame dependent effective action motivated by the postulates of three-space general coordinate invariance and Weyl scaling invariance exactly mimics a cosmological constant in Robertson-Walker spacetimes. However, in a static spherically symmetric Schwarzschild-like geometry it modifies the black hole horizon structu... |
2402.09044 | Sudipta Sarkar | Soham Acharya, Sudipta Sarkar | Non-existence of short hairs for static black holes | 7 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The black hole no-short hair theorem establishes a universal lower bound on
the extension of hairs outside any 4-dimensional spherically symmetric black
hole solutions. We generalise this theorem beyond spherical symmetry,
specifically for static, axisymmetric hairy black hole solutions and prove that
the ``hairosphe... | [
{
"created": "Wed, 14 Feb 2024 09:39:04 GMT",
"version": "v1"
}
] | 2024-02-15 | [
[
"Acharya",
"Soham",
""
],
[
"Sarkar",
"Sudipta",
""
]
] | The black hole no-short hair theorem establishes a universal lower bound on the extension of hairs outside any 4-dimensional spherically symmetric black hole solutions. We generalise this theorem beyond spherical symmetry, specifically for static, axisymmetric hairy black hole solutions and prove that the ``hairosphere... |
2004.06434 | Jose Luis Jaramillo | Jos\'e Luis Jaramillo, Rodrigo Panosso Macedo and Lamis Al Sheikh | Pseudospectrum and black hole quasi-normal mode (in)stability | 40 pages, 17 figures + 4 Appendices | Phys. Rev. X 11, 031003 (2021) | 10.1103/PhysRevX.11.031003 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of quasinormal modes (QNM) in asymptotically flat
black hole spacetimes by means of a pseudospectrum analysis. The construction
of the Schwarzschild QNM pseudospectrum reveals the following: (i) the
stability of the slowest-decaying QNM under perturbations respecting the
asymptotic structure, r... | [
{
"created": "Tue, 14 Apr 2020 11:48:35 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Nov 2020 16:45:46 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Jan 2021 19:50:06 GMT",
"version": "v3"
},
{
"created": "Tue, 14 Sep 2021 16:37:22 GMT",
"version": "v4"
}
] | 2021-09-15 | [
[
"Jaramillo",
"José Luis",
""
],
[
"Macedo",
"Rodrigo Panosso",
""
],
[
"Sheikh",
"Lamis Al",
""
]
] | We study the stability of quasinormal modes (QNM) in asymptotically flat black hole spacetimes by means of a pseudospectrum analysis. The construction of the Schwarzschild QNM pseudospectrum reveals the following: (i) the stability of the slowest-decaying QNM under perturbations respecting the asymptotic structure, rea... |
1501.04568 | Jorge Bellor\'in | Jorge Bellorin, Alvaro Restuccia and Adrian Sotomayor | Wormholes in Horava gravity with cosmological constant | 30 pages, 7 figures. Version 3: Changes in presentation with the same
results | International Journal of Modern Physics D25 (2016) 1650016 | 10.1142/S0218271816500164 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By combining analytical and numerical methods we find that the solutions of
the complete Horava theory with negative cosmological constant that satisfy the
conditions of staticity, spherical symmetry and vanishing of the shift function
are two kinds of geometry: (i) a wormhole-like solution with two sides joined
by a... | [
{
"created": "Mon, 19 Jan 2015 17:34:01 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jun 2015 17:24:32 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Nov 2015 21:50:02 GMT",
"version": "v3"
}
] | 2015-11-05 | [
[
"Bellorin",
"Jorge",
""
],
[
"Restuccia",
"Alvaro",
""
],
[
"Sotomayor",
"Adrian",
""
]
] | By combining analytical and numerical methods we find that the solutions of the complete Horava theory with negative cosmological constant that satisfy the conditions of staticity, spherical symmetry and vanishing of the shift function are two kinds of geometry: (i) a wormhole-like solution with two sides joined by a t... |
1408.6929 | Nobuyuki Sakai | Nobuyuki Sakai, Hiromi Saida, Takashi Tamaki | Gravastar Shadows | 9 pages, 11 figures | null | 10.1103/PhysRevD.90.104013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Direct observation of black holes is one of the grand challenges in
astronomy. If there are super-compact objects which possess unstable circular
orbits of photons, however, it may be difficult to distinguish them from black
holes by observing photons. As a model of super-compact objects, we consider a
gravastar (gra... | [
{
"created": "Fri, 29 Aug 2014 06:18:30 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Sakai",
"Nobuyuki",
""
],
[
"Saida",
"Hiromi",
""
],
[
"Tamaki",
"Takashi",
""
]
] | Direct observation of black holes is one of the grand challenges in astronomy. If there are super-compact objects which possess unstable circular orbits of photons, however, it may be difficult to distinguish them from black holes by observing photons. As a model of super-compact objects, we consider a gravastar (gravi... |
2006.01562 | John Barrow | John D. Barrow | A conjecture about the general cosmological solution of Einstein's
equations | 7 pages, no figures, added analysis | Phys. Rev. D 102, 024017 (2020) | 10.1103/PhysRevD.102.024017 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce consideration of a new factor, synchronisation of spacetime
Mixmaster oscillations, that may play a simplifying role in understanding the
nature of the general inhomogeneous cosmological solution to Einstein's
equations. We conjecture that, on approach to a singularity, the interaction of
spacetime Mixma... | [
{
"created": "Tue, 2 Jun 2020 12:33:04 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jun 2020 10:50:15 GMT",
"version": "v2"
}
] | 2020-07-15 | [
[
"Barrow",
"John D.",
""
]
] | We introduce consideration of a new factor, synchronisation of spacetime Mixmaster oscillations, that may play a simplifying role in understanding the nature of the general inhomogeneous cosmological solution to Einstein's equations. We conjecture that, on approach to a singularity, the interaction of spacetime Mixmast... |
1705.07034 | Carlos O. Lousto | James Healy, Carlos O. Lousto, Yosef Zlochower | The nonspinning binary black hole merger scenario revisited | 8 pages, 4 figures | Phys. Rev. D 96, 024031 (2017) | 10.1103/PhysRevD.96.024031 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the results of 14 simulations of nonspinning black hole binaries
with mass ratios $q=m_1/m_2$ in the range $1/100\leq q\leq1$. For each of these
simulations we perform three runs at increasing resolution to assess the finite
difference errors and to extrapolate the results to infinite resolution. For
$q\ge... | [
{
"created": "Fri, 19 May 2017 14:51:53 GMT",
"version": "v1"
}
] | 2017-07-26 | [
[
"Healy",
"James",
""
],
[
"Lousto",
"Carlos O.",
""
],
[
"Zlochower",
"Yosef",
""
]
] | We present the results of 14 simulations of nonspinning black hole binaries with mass ratios $q=m_1/m_2$ in the range $1/100\leq q\leq1$. For each of these simulations we perform three runs at increasing resolution to assess the finite difference errors and to extrapolate the results to infinite resolution. For $q\geq ... |
0812.3752 | Mihaela Chirvasa | M. Chirvasa, S. Husa | Finite Difference Methods for Second Order in Space, First Order in Time
Hyperbolic Systems and the Linear Shifted Wave Equation as a Model Problem in
Numerical Relativity | 36 pages, 10 figures | J. Comput. Phys. (2010) | 10.1016/j.jcp.2009.12.016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the problem of solving the Einstein equations, we discuss high
order finite difference discretizations of first order in time, second order in
space hyperbolic systems.Particular attention is paid to the case when first
order derivatives that can be identified with advection terms are approximated
with n... | [
{
"created": "Fri, 19 Dec 2008 14:00:49 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Jan 2010 11:11:40 GMT",
"version": "v2"
}
] | 2010-01-18 | [
[
"Chirvasa",
"M.",
""
],
[
"Husa",
"S.",
""
]
] | Motivated by the problem of solving the Einstein equations, we discuss high order finite difference discretizations of first order in time, second order in space hyperbolic systems.Particular attention is paid to the case when first order derivatives that can be identified with advection terms are approximated with non... |
0904.0184 | Abhay Ashtekar | Abhay Ashtekar | Some surprising implications of background independence in canonical
quantum gravity | To appear in the special issue of General Relativity and Gravitation,
dedicated to the memory of Professor Juergen Ehlers. 16 pages | Gen.Rel.Grav.41:1927-1943,2009 | 10.1007/s10714-009-0802-1 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a precise sense in which the requirement of background independence
suffices to uniquely select the kinematics of loop quantum gravity (LQG).
Specifically, the fundamental kinematic algebra of LQG admits a unique
diffeomorphism invariant state. Although this result has been established
rigorously, it comes a... | [
{
"created": "Wed, 1 Apr 2009 15:24:49 GMT",
"version": "v1"
}
] | 2010-03-12 | [
[
"Ashtekar",
"Abhay",
""
]
] | There is a precise sense in which the requirement of background independence suffices to uniquely select the kinematics of loop quantum gravity (LQG). Specifically, the fundamental kinematic algebra of LQG admits a unique diffeomorphism invariant state. Although this result has been established rigorously, it comes as ... |
1108.3994 | Jan Weenink | Jan Weenink and Tomislav Prokopec | On decoherence of cosmological perturbations and stochastic inflation | 21 pages, 1 figure, prepared for submission to JCAP | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By making a suitable generalization of the Starobinsky stochastic inflation,
we propose a classical phase space formulation of stochastic inflation which
may be used for a quantitative study of decoherence of cosmological
perturbations during inflation. The precise knowledge of how much cosmological
perturbations hav... | [
{
"created": "Fri, 19 Aug 2011 16:12:26 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 2012 14:56:00 GMT",
"version": "v2"
}
] | 2012-01-04 | [
[
"Weenink",
"Jan",
""
],
[
"Prokopec",
"Tomislav",
""
]
] | By making a suitable generalization of the Starobinsky stochastic inflation, we propose a classical phase space formulation of stochastic inflation which may be used for a quantitative study of decoherence of cosmological perturbations during inflation. The precise knowledge of how much cosmological perturbations have ... |
2210.06608 | G. Alencar | J. Furtado and G. Alencar | BTZ Black-bounce to Traversable Wormhole | Accepted for publication in Universe | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the charged and uncharged BTZ counterpart of the
Black-Bounce proposed by Simpson and Visser recently. For the uncharged case,
we find that the temperature is not modified by the bounce parameter. We also
find that the wormhole side of the solution must always be supported by exotic
matter ove... | [
{
"created": "Wed, 12 Oct 2022 22:12:50 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Nov 2022 12:41:46 GMT",
"version": "v2"
}
] | 2022-11-24 | [
[
"Furtado",
"J.",
""
],
[
"Alencar",
"G.",
""
]
] | In this paper, we study the charged and uncharged BTZ counterpart of the Black-Bounce proposed by Simpson and Visser recently. For the uncharged case, we find that the temperature is not modified by the bounce parameter. We also find that the wormhole side of the solution must always be supported by exotic matter over ... |
1410.2631 | Piotr Bizon | Piotr Bizo\'n, Andrzej Rostworowski | Comment on "Holographic Thermalization, stability of AdS, and the
Fermi-Pasta-Ulam-Tsingou paradox" by V. Balasubramanian et al | 1 page | Phys. Rev. Lett. 115, 049101 (2015) | 10.1103/PhysRevLett.115.049101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We comment upon a numerical computation in a recent paper by Balasubramanian,
Buchel, Green, Lehner, and Liebling.
| [
{
"created": "Thu, 9 Oct 2014 21:21:23 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"Bizoń",
"Piotr",
""
],
[
"Rostworowski",
"Andrzej",
""
]
] | We comment upon a numerical computation in a recent paper by Balasubramanian, Buchel, Green, Lehner, and Liebling. |
gr-qc/9405048 | Carlos O. Lousto | C. O. Lousto | The Emergence of an Effective two - dimensional Quantum Description from
the study of Critical Phenomena in Black Holes | Plain TeX, 16 pages, preprint UAB-FT-340 (Fifth Price from the
Gravity Research Foundation 1994) | Phys.Rev.D51:1733-1740,1995 | 10.1103/PhysRevD.51.1733 | null | gr-qc astro-ph hep-th | null | We study the occurrence of critical phenomena in four - dimensional, rotating
and charged black holes, derive the critical exponents and show that they
fulfill the scaling laws. Correlation functions critical exponents and
Renormalization Group considerations assign an effective (spatial) dimension,
$d=2$, to the sys... | [
{
"created": "Sun, 22 May 1994 19:32:34 GMT",
"version": "v1"
},
{
"created": "Wed, 25 May 1994 12:39:33 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Lousto",
"C. O.",
""
]
] | We study the occurrence of critical phenomena in four - dimensional, rotating and charged black holes, derive the critical exponents and show that they fulfill the scaling laws. Correlation functions critical exponents and Renormalization Group considerations assign an effective (spatial) dimension, $d=2$, to the syste... |
1111.1801 | Xin-Zhou Li | Xi-Chen Ao and Xin-Zhou Li | de Sitter Gauge Theory of Gravity: An Alternative Torsion Cosmology | 11pages, 5 figures | JCAP 1110:039,2011 | 10.1088/1475-7516/2011/10/039 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new cosmological model based on the de Sitter gauge theory (dSGT) is
studied in this paper. By some transformations, we find, in the dust universe,
the cosmological equations of dSGT could form an autonomous system. We conduct
dynamics analysis to this system, and find 9 critical points, among which there
exist one... | [
{
"created": "Tue, 8 Nov 2011 04:43:34 GMT",
"version": "v1"
}
] | 2011-11-09 | [
[
"Ao",
"Xi-Chen",
""
],
[
"Li",
"Xin-Zhou",
""
]
] | A new cosmological model based on the de Sitter gauge theory (dSGT) is studied in this paper. By some transformations, we find, in the dust universe, the cosmological equations of dSGT could form an autonomous system. We conduct dynamics analysis to this system, and find 9 critical points, among which there exist one p... |
0901.0964 | Herbert Hamber | Herbert W. Hamber | Quantum Gravity on the Lattice | 63 pages, 12 figures | Gen.Rel.Grav.41:817-876,2009 | 10.1007/s10714-009-0769-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I review the lattice approach to quantum gravity, and how it relates to the
non-trivial ultraviolet fixed point scenario of the continuum theory. After a
brief introduction covering the general problem of ultraviolet divergences in
gravity and other non-renormalizable theories, I cover the general methods and
goals o... | [
{
"created": "Thu, 8 Jan 2009 02:30:06 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jan 2009 20:57:59 GMT",
"version": "v2"
}
] | 2009-04-17 | [
[
"Hamber",
"Herbert W.",
""
]
] | I review the lattice approach to quantum gravity, and how it relates to the non-trivial ultraviolet fixed point scenario of the continuum theory. After a brief introduction covering the general problem of ultraviolet divergences in gravity and other non-renormalizable theories, I cover the general methods and goals of ... |
2403.12731 | Shunsei Yamamura | Shunsei Yamamura, Hirotaka Yuzurihara, Takahiro Yamamoto, Takashi
Uchiyama | Extension of the characterization method for non-Gaussianity in
gravitational wave detector with statistical hypothesis test | 18 pages, 11 figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In gravitational wave astronomy, non-Gaussian noise, such as scattered light
noise disturbs stable interferometer operation, limiting the interferometer's
sensitivity, and reducing the reliability of the analyses. In scattered light
noise, the non-Gaussian noise dominates the sensitivity in a low frequency
range of l... | [
{
"created": "Tue, 19 Mar 2024 13:46:59 GMT",
"version": "v1"
}
] | 2024-03-20 | [
[
"Yamamura",
"Shunsei",
""
],
[
"Yuzurihara",
"Hirotaka",
""
],
[
"Yamamoto",
"Takahiro",
""
],
[
"Uchiyama",
"Takashi",
""
]
] | In gravitational wave astronomy, non-Gaussian noise, such as scattered light noise disturbs stable interferometer operation, limiting the interferometer's sensitivity, and reducing the reliability of the analyses. In scattered light noise, the non-Gaussian noise dominates the sensitivity in a low frequency range of les... |
gr-qc/0012013 | Ronald W. Hellings | Ronald W. Hellings (Jet Propulsion Laboratory) | Elimination of Clock Jitter Noise in Spaceborn Laser Interferometers | 20 pages, 5 figures | Phys.Rev. D64 (2001) 022002 | 10.1103/PhysRevD.64.022002 | null | gr-qc | null | Space gravitational wave detectors employing laser interferometry between
free-flying spacecraft differ in many ways from their laboratory counterparts.
Among these differences is the fact that, in space, the end-masses will be
moving relative to each other. This creates a problem by inducing a Doppler
shift between ... | [
{
"created": "Mon, 4 Dec 2000 21:04:32 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Dec 2000 00:47:21 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Hellings",
"Ronald W.",
"",
"Jet Propulsion Laboratory"
]
] | Space gravitational wave detectors employing laser interferometry between free-flying spacecraft differ in many ways from their laboratory counterparts. Among these differences is the fact that, in space, the end-masses will be moving relative to each other. This creates a problem by inducing a Doppler shift between th... |
gr-qc/0304027 | Achilles D. Speliotopoulos | Raymond Y. Chiao and Achilles D. Speliotopoulos | Quantum Interference to Measure Spacetime Curvature: A Proposed
Experiment at the Intersection of Quantum Mechanics and General Relativity | 7 pages LaTeXed with RevTeX 4.0, 2 figures. Submitted to the 2003
Gravity Research Foundation Essay Contest | Int.J.Mod.Phys.D12:1627-1632,2003 | 10.1142/S0218271803003943 | null | gr-qc | null | An experiment in Low Earth Orbit (LEO) is proposed to measure components of
the Riemann curvature tensor using atom interferometry. We show that the
difference in the quantum phase $\Delta\phi$ of an atom that can travel along
two intersecting geodesics is given by $mR_{0i0j}/\hbar$ times the spacetime
volume contain... | [
{
"created": "Sun, 6 Apr 2003 03:41:18 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Apr 2003 21:54:30 GMT",
"version": "v2"
}
] | 2011-09-13 | [
[
"Chiao",
"Raymond Y.",
""
],
[
"Speliotopoulos",
"Achilles D.",
""
]
] | An experiment in Low Earth Orbit (LEO) is proposed to measure components of the Riemann curvature tensor using atom interferometry. We show that the difference in the quantum phase $\Delta\phi$ of an atom that can travel along two intersecting geodesics is given by $mR_{0i0j}/\hbar$ times the spacetime volume contained... |
1904.05762 | David Benisty | Fotios K. Anagnostopoulos, David Benisty, Spyros Basilakos, Eduardo I.
Guendelman | Dark energy and dark matter unification from dynamical space time:
observational constraints and cosmological implications | Small modifications, BBN constraint | JCAP 06 (2019) 003 | 10.1088/1475-7516/2019/06/003 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recently proposed Dynamical Space-time Cosmology (DSC) that unifies dark
energy and dark matter is studied. The general action of this scenario includes
a Lagrange multiplier, which is coupled to the energy momentum tensor and a
scalar field which is different from quintessence. First for various types of
potential... | [
{
"created": "Thu, 11 Apr 2019 15:18:02 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 2019 13:27:22 GMT",
"version": "v2"
}
] | 2019-06-10 | [
[
"Anagnostopoulos",
"Fotios K.",
""
],
[
"Benisty",
"David",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Guendelman",
"Eduardo I.",
""
]
] | A recently proposed Dynamical Space-time Cosmology (DSC) that unifies dark energy and dark matter is studied. The general action of this scenario includes a Lagrange multiplier, which is coupled to the energy momentum tensor and a scalar field which is different from quintessence. First for various types of potentials ... |
1606.05265 | Etienne Baffou | E. H. Baffou, I. G. Salako, M. J. S. Houndjo | Viscous Generalized Chaplygin Gas Interacting with f(R,T) gravity | 10 pages and 5 figures | International Journal of Geometric Methods in Modern Physics, 2017 | 10.1142/S0219887817500517 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study in Friedmann-Robertson-Walker universe the
interaction between the viscous generalized Chaplygin gas with $f(R,T)$
gravity, which is an arbitrary function of the Ricci scalar $R$ and the trace
$T$ of the energy-momentum tensor. Assuming that the contents of universe is
dominated by a generaliz... | [
{
"created": "Wed, 15 Jun 2016 09:23:54 GMT",
"version": "v1"
}
] | 2017-05-11 | [
[
"Baffou",
"E. H.",
""
],
[
"Salako",
"I. G.",
""
],
[
"Houndjo",
"M. J. S.",
""
]
] | In this paper, we study in Friedmann-Robertson-Walker universe the interaction between the viscous generalized Chaplygin gas with $f(R,T)$ gravity, which is an arbitrary function of the Ricci scalar $R$ and the trace $T$ of the energy-momentum tensor. Assuming that the contents of universe is dominated by a generalized... |
1810.05001 | Hossein Shenavar | Hossein Shenavar and Kurosh Javidan | A Modified Dynamical Model of Cosmology I. Theory | The model is discussed in more details. Data analysis of the model
will be presented in future. Includes 48 pages and 9 figures | Universe 2020, 6(1), 1 | 10.3390/universe6010001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wheeler (1964) had formulated Mach's principle as the boundary condition for
general relativistic field equations. Here, we use this idea and develop a
modified dynamical model of cosmology based on imposing Neumann boundary
condition on cosmological perturbation equations. Then, it is shown that a new
term appears i... | [
{
"created": "Thu, 11 Oct 2018 13:15:05 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jun 2019 16:31:43 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Jan 2020 08:03:54 GMT",
"version": "v3"
}
] | 2020-01-16 | [
[
"Shenavar",
"Hossein",
""
],
[
"Javidan",
"Kurosh",
""
]
] | Wheeler (1964) had formulated Mach's principle as the boundary condition for general relativistic field equations. Here, we use this idea and develop a modified dynamical model of cosmology based on imposing Neumann boundary condition on cosmological perturbation equations. Then, it is shown that a new term appears in ... |
1707.07125 | Sushant Ghosh Prof | Balendra Pratap Singh and Sushant G. Ghosh | Shadow of Schwarzschild-Tangherlini black holes | 16 pages, 5 figures, 1 table | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the shadow cast by the H$D$ Schwarzschild-Tangherlini black hole,
and analytically calculate the influence of extra dimensions on the shadow of a
black hole. A black hole casts a shadow as an optical appearance because of its
strong gravitational field which is known to be a dark zone covered by a circle
for... | [
{
"created": "Sat, 22 Jul 2017 09:15:31 GMT",
"version": "v1"
}
] | 2017-07-25 | [
[
"Singh",
"Balendra Pratap",
""
],
[
"Ghosh",
"Sushant G.",
""
]
] | We study the shadow cast by the H$D$ Schwarzschild-Tangherlini black hole, and analytically calculate the influence of extra dimensions on the shadow of a black hole. A black hole casts a shadow as an optical appearance because of its strong gravitational field which is known to be a dark zone covered by a circle for a... |
gr-qc/0010025 | Daniel Sforza | Rafael Ferraro and Daniel M. Sforza | Operator ordering for generally covariant systems | 4 pages. Talk given at the Third Conference on "Constrained Dynamics
and Quantum Gravity" held in Sardinia (Italy), September 1999. Journal
reference:Nucl. Phys. B (Proc. Suppl.) 88 (2000) 322-325 | Nucl.Phys.Proc.Suppl. 88 (2000) 322-325 | 10.1016/S0920-5632(00)00794-5 | null | gr-qc | null | The constraint operators belonging to a generally covariant system are found
out within the framework of the BRST formalism. The result embraces quadratic
Hamiltonian constraints whose potential can be factorized as a never null
function times a gauge invariant function. The building of the inner product
between phys... | [
{
"created": "Fri, 6 Oct 2000 21:46:41 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Ferraro",
"Rafael",
""
],
[
"Sforza",
"Daniel M.",
""
]
] | The constraint operators belonging to a generally covariant system are found out within the framework of the BRST formalism. The result embraces quadratic Hamiltonian constraints whose potential can be factorized as a never null function times a gauge invariant function. The building of the inner product between physic... |
1512.00655 | K Haris | K Haris, Archana Pai | Study of statistical properties of hybrid statistic in coherent
multi-detector compact binary coalescences Search | Published in Phys. Rev. D | Phys. Rev. D 93, 102002 (2016) | 10.1103/PhysRevD.93.102002 | LIGO laboratory document number LIGO-P1500221 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we revisit the problem of coherent multi-detector search of
gravitational wave from compact binary coalescence with Neutron stars and Black
Holes using advanced interferometers like LIGO-Virgo. Based on the loss of
optimal multi-detector signal-to-noise ratio (SNR), we construct a hybrid
statistic as... | [
{
"created": "Wed, 2 Dec 2015 11:37:22 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Mar 2017 18:32:28 GMT",
"version": "v2"
}
] | 2017-03-17 | [
[
"Haris",
"K",
""
],
[
"Pai",
"Archana",
""
]
] | In this article, we revisit the problem of coherent multi-detector search of gravitational wave from compact binary coalescence with Neutron stars and Black Holes using advanced interferometers like LIGO-Virgo. Based on the loss of optimal multi-detector signal-to-noise ratio (SNR), we construct a hybrid statistic as a... |
1608.08705 | Yu-Xiao Liu | Yu-Peng Zhang, Bao-Min Gu, Shao-Wen Wei, Jie Yang, Yu-Xiao Liu | Charged spinning black holes as accelerators of spinning particles | 10 pages, 11 figures, Superluminal region in the parameter space
discussed, to be published in PRD | Phys. Rev. D 94, 124017 (2016) | 10.1103/PhysRevD.94.124017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that some black holes can act as accelerators for particles
without spin. Recently, there are some works considering collision of two
spinning particles in the background of Schwarzschild and Kerr black holes and
it was shown that {the center-of-mass energy of the test particles is related
to the spi... | [
{
"created": "Wed, 31 Aug 2016 02:09:06 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Sep 2016 02:12:55 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Nov 2016 01:04:59 GMT",
"version": "v3"
}
] | 2016-12-21 | [
[
"Zhang",
"Yu-Peng",
""
],
[
"Gu",
"Bao-Min",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Yang",
"Jie",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | It is well known that some black holes can act as accelerators for particles without spin. Recently, there are some works considering collision of two spinning particles in the background of Schwarzschild and Kerr black holes and it was shown that {the center-of-mass energy of the test particles is related to the spin}... |
gr-qc/0503097 | Leonard Susskind | Leonard Susskind | Wormholes and Time Travel? Not Likely | 5 pages, remark added about time delay in identification. Reference
added | null | null | null | gr-qc astro-ph hep-th | null | Wormholes have been advanced as both a method for circumventing the
limitations of the speed of light as well as a means for building a time
machine (to travel to the past). Thus it is argued that General Relativity may
allow both of these possibilities. In this note I argue that traversable
wormholes connecting othe... | [
{
"created": "Wed, 23 Mar 2005 02:10:21 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Mar 2005 04:02:05 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Apr 2005 19:54:25 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Susskind",
"Leonard",
""
]
] | Wormholes have been advanced as both a method for circumventing the limitations of the speed of light as well as a means for building a time machine (to travel to the past). Thus it is argued that General Relativity may allow both of these possibilities. In this note I argue that traversable wormholes connecting otherw... |
gr-qc/0511152 | Alicia M. Sintes | Alicia M Sintes (for the LIGO Scientific Collaboration) | Recent results on the search for continuous sources with LIGO and GEO600 | TAUP2005 Proceedings to be published in Journal of Physics:
Conference Series | J.Phys.Conf.Ser. 39 (2006) 36-38 | 10.1088/1742-6596/39/1/008 | null | gr-qc | null | An overview of the searches for continuous gravitational wave signals in LIGO
and GEO 600 performed on different recent science runs and results are
presented. This includes both searching for gravitational waves from known
pulsars as well as blind searches over a wide parameter space.
| [
{
"created": "Tue, 29 Nov 2005 14:51:50 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Sintes",
"Alicia M",
"",
"for the LIGO Scientific Collaboration"
]
] | An overview of the searches for continuous gravitational wave signals in LIGO and GEO 600 performed on different recent science runs and results are presented. This includes both searching for gravitational waves from known pulsars as well as blind searches over a wide parameter space. |
gr-qc/9710027 | William Pezzaglia . D. | William M. Pezzaglia (Physics Dept., Santa Clara Univ.) | Physical Applications of a Generalized Clifford Calculus (Papapetrou
equations and Metamorphic Curvature) | 12 pages, LaTeX, no figures, Summary of talk given in the Analysis of
Dirac Operators section at the meeting of the International Society for
Analysis, its Applications and Computation, Univ. of Delaware June 1997 | null | null | clf-alg/pezz9701 | gr-qc dg-ga math-ph math.DG math.MP | null | A generalized Clifford manifold is proposed in which there are coordinates
not only for the basis vector generators, but for each element of the Clifford
group, including the identity scalar. These new quantities are physically
interpreted to represent internal structure of matter (e.g. classical or
quantum spin). Th... | [
{
"created": "Fri, 3 Oct 1997 22:37:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pezzaglia",
"William M.",
"",
"Physics Dept., Santa Clara Univ."
]
] | A generalized Clifford manifold is proposed in which there are coordinates not only for the basis vector generators, but for each element of the Clifford group, including the identity scalar. These new quantities are physically interpreted to represent internal structure of matter (e.g. classical or quantum spin). The ... |
2102.06550 | Ahmad Sheykhi | Ahmad Sheykhi | Barrow Entropy Corrections to Friedmann Equations | 8 pages, two columns, new version | Phys. Rev. D 103, 123503 (2021) | 10.1103/PhysRevD.103.123503 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Inspired by the Covid-$19$ virus structure, Barrow argued that
quantum-gravitational effects may introduce intricate, fractal features on the
black hole horizon [Phys. Lett. B {\bf808} (2020) 135643]. In this viewpoint,
black hole entropy no longer obeys the area law and instead it can be given by
$S\sim A^{1+\delta/... | [
{
"created": "Thu, 11 Feb 2021 18:44:59 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Feb 2021 13:18:30 GMT",
"version": "v2"
},
{
"created": "Sun, 28 Feb 2021 07:13:21 GMT",
"version": "v3"
}
] | 2021-06-09 | [
[
"Sheykhi",
"Ahmad",
""
]
] | Inspired by the Covid-$19$ virus structure, Barrow argued that quantum-gravitational effects may introduce intricate, fractal features on the black hole horizon [Phys. Lett. B {\bf808} (2020) 135643]. In this viewpoint, black hole entropy no longer obeys the area law and instead it can be given by $S\sim A^{1+\delta/2}... |
gr-qc/9609035 | null | Vladimir S. Mashkevich (Institute of Physics, Kiev) | Indeterministic Quantum Gravity IV. The Cosmic-length Universe and the
Problem of the Missing Dark Matter | 7 pages, LATEX 2.09 | null | null | null | gr-qc astro-ph | null | This paper is a sequel of the series of papers [gr-qc/9409010, gr-qc/9505034,
gr-qc/9603022], being an immediate continuation and development of the latter
of them. In the Friedmann universe, the equation $\Omega_0=2q_0$ holds
($\Omega$ is density parameter, $q$ is deceleration parameter, and subscript 0
indicates pr... | [
{
"created": "Fri, 13 Sep 1996 09:37:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashkevich",
"Vladimir S.",
"",
"Institute of Physics, Kiev"
]
] | This paper is a sequel of the series of papers [gr-qc/9409010, gr-qc/9505034, gr-qc/9603022], being an immediate continuation and development of the latter of them. In the Friedmann universe, the equation $\Omega_0=2q_0$ holds ($\Omega$ is density parameter, $q$ is deceleration parameter, and subscript 0 indicates pres... |
1706.09175 | Yasusada Nambu | Shingo Kukita and Yasusada Nambu | Entanglement dynamics in de Sitter spacetime | 16 pages, accepted version in Class. Quantum Gravity | null | 10.1088/1361-6382/aa8e31 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the master equation with dynamical coarse graining approximation to
a pair of detectors interacting with a scalar field. By solving the master
equation numerically, we investigate evolution of negativity between comoving
detectors in de Sitter space. For the massless conformal scalar field, it is
found that ... | [
{
"created": "Wed, 28 Jun 2017 09:00:51 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Oct 2017 01:08:15 GMT",
"version": "v2"
}
] | 2017-12-06 | [
[
"Kukita",
"Shingo",
""
],
[
"Nambu",
"Yasusada",
""
]
] | We apply the master equation with dynamical coarse graining approximation to a pair of detectors interacting with a scalar field. By solving the master equation numerically, we investigate evolution of negativity between comoving detectors in de Sitter space. For the massless conformal scalar field, it is found that a ... |
gr-qc/0010050 | John W. Barrett | John W. Barrett | State sum models for quantum gravity | amslatex, 7 pages, ICMP conference talk | null | null | null | gr-qc | null | This paper reviews the construction of quantum field theory on a
4-dimensional spacetime by combinatorial methods, and discusses the recent
developments in the direction of a combinatorial construction of quantum
gravity.
| [
{
"created": "Thu, 12 Oct 2000 22:08:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barrett",
"John W.",
""
]
] | This paper reviews the construction of quantum field theory on a 4-dimensional spacetime by combinatorial methods, and discusses the recent developments in the direction of a combinatorial construction of quantum gravity. |
1412.4475 | Yoshiaki Ohkuwa | Yoshiaki Ohkuwa, Yasuo Ezawa | On the canonical formalism of $f(R)$-type gravity using Lie derivatives | 11 pages, no figures, Version accepted for publication in Eur. Phys.
J. Plus | Eur. Phys. J. Plus (2015) 130: 77 | 10.1140/epjp/i2015-15077-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a canonical formalism of the $f(R)$-type gravity using the Lie
derivatives instead of the time derivatives by refining the formalism of our
group. The previous formalism is a direct generalization of the Ostrogradski's
formalism. However the use of the Lie derivatives was not sufficient in that
Lie derivat... | [
{
"created": "Mon, 15 Dec 2014 07:13:39 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Dec 2014 00:51:43 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Jun 2015 08:45:25 GMT",
"version": "v3"
}
] | 2015-06-26 | [
[
"Ohkuwa",
"Yoshiaki",
""
],
[
"Ezawa",
"Yasuo",
""
]
] | We present a canonical formalism of the $f(R)$-type gravity using the Lie derivatives instead of the time derivatives by refining the formalism of our group. The previous formalism is a direct generalization of the Ostrogradski's formalism. However the use of the Lie derivatives was not sufficient in that Lie derivativ... |
1007.3820 | Xin Li | Xin Li and Zhe Chang | Reply to Sergiu I. Vacaru's "Critical remarks on Finsler modifications
of gravity and cosmology by Zhe Chang and Xin Li" | null | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/3.0/ | This is our reply to "Critical remarks on Finslerian modifications of gravity
and cosmology by Zhe Chang and Xin Li", Sergiu I. Vacaru, Phys. Lett. B 690
(2010) 224. It is pointed out that the Finslerian modifications of gravity and
cosmology (Zhe Chang and Xin Li, Phys. Lett. B 676 (2009) 173; {\it ibid} 668
(2008) ... | [
{
"created": "Thu, 22 Jul 2010 08:08:32 GMT",
"version": "v1"
}
] | 2010-07-23 | [
[
"Li",
"Xin",
""
],
[
"Chang",
"Zhe",
""
]
] | This is our reply to "Critical remarks on Finslerian modifications of gravity and cosmology by Zhe Chang and Xin Li", Sergiu I. Vacaru, Phys. Lett. B 690 (2010) 224. It is pointed out that the Finslerian modifications of gravity and cosmology (Zhe Chang and Xin Li, Phys. Lett. B 676 (2009) 173; {\it ibid} 668 (2008) 45... |
1402.6285 | Larry Ford | C. H. G. Bessa, V. A. De Lorenci and L. H. Ford | An Analog Model for Light Propagation in Semiclassical Gravity | 12 pages, 2 figures | Phys. Rev. D 90, 024036 (2014) | 10.1103/PhysRevD.90.024036 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We treat a model based upon nonlinear optics for the semiclassical
gravitational effects of quantum fields upon light propagation. Our model uses
a nonlinear material with a nonzero third order polarizability. Here a probe
light pulse satisfies a wave equation containing the expectation value of the
squared electric ... | [
{
"created": "Tue, 25 Feb 2014 19:26:18 GMT",
"version": "v1"
}
] | 2014-07-23 | [
[
"Bessa",
"C. H. G.",
""
],
[
"De Lorenci",
"V. A.",
""
],
[
"Ford",
"L. H.",
""
]
] | We treat a model based upon nonlinear optics for the semiclassical gravitational effects of quantum fields upon light propagation. Our model uses a nonlinear material with a nonzero third order polarizability. Here a probe light pulse satisfies a wave equation containing the expectation value of the squared electric fi... |
2010.13071 | Liu Zhao | Shaofan Liu and Liu Zhao | Work and work-energy theorem in curved spacetime | 21 pages. v3: Title changed and significant amendments involved | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The definitions of gravitational work as well as work done by the total
external force on a massive probe particle moving in generic spacetime
backgrounds are proposed. These definitions are given in the form of scalar
integrals and thus, are independent of coordinate choices. However, the
dependence on the choice of... | [
{
"created": "Sun, 25 Oct 2020 09:02:09 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Oct 2020 01:49:17 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Nov 2021 15:52:51 GMT",
"version": "v3"
}
] | 2021-11-17 | [
[
"Liu",
"Shaofan",
""
],
[
"Zhao",
"Liu",
""
]
] | The definitions of gravitational work as well as work done by the total external force on a massive probe particle moving in generic spacetime backgrounds are proposed. These definitions are given in the form of scalar integrals and thus, are independent of coordinate choices. However, the dependence on the choice of o... |
1811.01625 | Zhu Yi | Zhu Yi and Yungui Gong | Gauss-Bonnet inflation and swampland | 11 pages, 2 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The two swampland criteria are generically in tension with the single field
slow-roll inflation because the first swampland criterion requires small tensor
to scalar ratio while the second swampland criterion requires large tensor to
scalar ratio. The challenge to the single field slow-roll inflation imposed by
the s... | [
{
"created": "Mon, 5 Nov 2018 11:46:16 GMT",
"version": "v1"
}
] | 2018-11-06 | [
[
"Yi",
"Zhu",
""
],
[
"Gong",
"Yungui",
""
]
] | The two swampland criteria are generically in tension with the single field slow-roll inflation because the first swampland criterion requires small tensor to scalar ratio while the second swampland criterion requires large tensor to scalar ratio. The challenge to the single field slow-roll inflation imposed by the swa... |
gr-qc/0610025 | Mattias Marklund | G. Brodin, D. Eriksson, M. Marklund | Graviton mediated photon-photon scattering in general relativity | 5 pages, 3 figures | Phys.Rev.D74:124028,2006 | 10.1103/PhysRevD.74.124028 | null | gr-qc hep-ph | null | In this paper we consider photon-photon scattering due to self-induced
gravitational perturbations on a Minkowski background. We focus on four-wave
interaction between plane waves with weakly space and time dependent
amplitudes, since interaction involving a fewer number of waves is excluded by
energy-momentum conser... | [
{
"created": "Fri, 6 Oct 2006 14:30:55 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Brodin",
"G.",
""
],
[
"Eriksson",
"D.",
""
],
[
"Marklund",
"M.",
""
]
] | In this paper we consider photon-photon scattering due to self-induced gravitational perturbations on a Minkowski background. We focus on four-wave interaction between plane waves with weakly space and time dependent amplitudes, since interaction involving a fewer number of waves is excluded by energy-momentum conserva... |
gr-qc/0503008 | Chul-Moon Yoo | Chul-Moon Yoo, Ken-ichi Nakao, Daisuke Ida | Hoop Conjecture in Five-dimensios -Violation of Cosmic Censorship- | 23 pages, 7 figures, PRD accepted version | Phys.Rev. D71 (2005) 104014 | 10.1103/PhysRevD.71.104014 | OCU-PHYS-227, AP-GR-23 | gr-qc | null | We study the condition of black hole formation in five-dimensional
space-time. We analytically solve the constraint equations of five-dimensional
Einstein equations for momentarily static and conformally flat initial data of
a spheroidal mass. We numerically search for an apparent horizon in various
initial hypersurf... | [
{
"created": "Wed, 2 Mar 2005 03:54:21 GMT",
"version": "v1"
},
{
"created": "Fri, 13 May 2005 05:36:05 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Yoo",
"Chul-Moon",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Ida",
"Daisuke",
""
]
] | We study the condition of black hole formation in five-dimensional space-time. We analytically solve the constraint equations of five-dimensional Einstein equations for momentarily static and conformally flat initial data of a spheroidal mass. We numerically search for an apparent horizon in various initial hypersurfac... |
2010.07472 | V. G. Gurzadyan | A.Stepanian, Sh.Khlghatyan, V.G. Gurzadyan | Lense-Thirring precession and gravito-gyromagnetic ratio | Eur. Phys. Journal C (Lett), in press, 6 pages | Eur. Phys. Journal C, 80, 1011 (2020) | 10.1140/epjc/s10052-020-08560-0 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The geodesics of bound spherical orbits i.e. of orbits performing
Lense-Thirring precession, are obtained in the case of the $\Lambda$-term
within gravito-electromagnetic formalism. It is shown that the presence of the
$\Lambda$-term in the equations of gravity leads to both relativistic and
non-relativistic correcti... | [
{
"created": "Thu, 15 Oct 2020 02:27:13 GMT",
"version": "v1"
}
] | 2020-11-18 | [
[
"Stepanian",
"A.",
""
],
[
"Khlghatyan",
"Sh.",
""
],
[
"Gurzadyan",
"V. G.",
""
]
] | The geodesics of bound spherical orbits i.e. of orbits performing Lense-Thirring precession, are obtained in the case of the $\Lambda$-term within gravito-electromagnetic formalism. It is shown that the presence of the $\Lambda$-term in the equations of gravity leads to both relativistic and non-relativistic correction... |
1804.05840 | Mordehai Milgrom | Mordehai Milgrom | MOND from a brane-world picture | 17 pages, 1 Figure. Added a figure describing the schematics of the
brane dynamics. To appear in Jacob Bekenstein Memorial Volume: The
Conservative Revolutionary (World Scientific) | null | null | null | gr-qc astro-ph.CO astro-ph.GA hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I describe a heuristic model where MOND dynamics emerge in a universe viewed
as a nearly spherical brane embedded in a higher-dimensional flat space. The
brane, described by $\xi(\Omega)$, is of density $\sigma$ ($\xi$ and $\Omega$
are the radial and angular coordinates in the embedding space). The brane and
matter -... | [
{
"created": "Mon, 16 Apr 2018 12:35:16 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Mar 2019 11:32:47 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Jul 2019 12:40:51 GMT",
"version": "v3"
}
] | 2019-07-30 | [
[
"Milgrom",
"Mordehai",
""
]
] | I describe a heuristic model where MOND dynamics emerge in a universe viewed as a nearly spherical brane embedded in a higher-dimensional flat space. The brane, described by $\xi(\Omega)$, is of density $\sigma$ ($\xi$ and $\Omega$ are the radial and angular coordinates in the embedding space). The brane and matter -- ... |
gr-qc/9904081 | George Bogoslovsky | G.Yu. Bogoslovsky, H.F. Goenner | Finslerian spaces possessing local relativistic symmetry | 32 pages, 1 table, 4 figures, latex | Gen.Rel.Grav. 31 (1999) 1565-1603 | 10.1023/A:1026786505326 | Preprint NPI MSU -- 99-10/568 | gr-qc astro-ph hep-th | null | It is shown that the problem of a possible violation of the Lorentz
transformations at Lorentz factors $\gamma >5\times 10^{10} ,$ indicated by the
situation which has developed in the physics of ultra-high energy cosmic rays
(the absence of the GZK cutoff), has a nontrivial solution. Its essence
consists in the disc... | [
{
"created": "Fri, 30 Apr 1999 11:19:50 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Bogoslovsky",
"G. Yu.",
""
],
[
"Goenner",
"H. F.",
""
]
] | It is shown that the problem of a possible violation of the Lorentz transformations at Lorentz factors $\gamma >5\times 10^{10} ,$ indicated by the situation which has developed in the physics of ultra-high energy cosmic rays (the absence of the GZK cutoff), has a nontrivial solution. Its essence consists in the discov... |
1809.03109 | Mohammed M. Khalil | Mohammed Khalil, Noah Sennett, Jan Steinhoff, Justin Vines, Alessandra
Buonanno | Hairy binary black holes in Einstein-Maxwell-dilaton theory and their
effective-one-body description | 36 pages, 12 figures, updated to match published version | Phys. Rev. D 98, 104010 (2018) | 10.1103/PhysRevD.98.104010 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In General Relativity and many modified theories of gravity, isolated black
holes (BHs) cannot source massless scalar fields. Einstein-Maxwell-dilaton
(EMd) theory is an exception: through couplings both to electromagnetism and
(non-minimally) to gravity, a massless scalar field can be generated by an
electrically ch... | [
{
"created": "Mon, 3 Sep 2018 16:07:05 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Nov 2018 18:35:56 GMT",
"version": "v2"
}
] | 2018-11-15 | [
[
"Khalil",
"Mohammed",
""
],
[
"Sennett",
"Noah",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Vines",
"Justin",
""
],
[
"Buonanno",
"Alessandra",
""
]
] | In General Relativity and many modified theories of gravity, isolated black holes (BHs) cannot source massless scalar fields. Einstein-Maxwell-dilaton (EMd) theory is an exception: through couplings both to electromagnetism and (non-minimally) to gravity, a massless scalar field can be generated by an electrically char... |
gr-qc/0201062 | Carlos Lousto | S.Dain (AEI), C.O.Lousto (AEI-UTBrownsville), and R.Takahashi
(TAC-Copenhagen) | New conformally flat initial data for spinning black holes | 6 pages, 4 figures, RevTeX 4 | Phys.Rev. D65 (2002) 104038 | 10.1103/PhysRevD.65.104038 | AEI-2002-009 | gr-qc | null | We obtain an explicit solution of the momentum constraint for conformally
flat, maximal slicing, initial data which gives an alternative to the purely
longitudinal extrinsic curvature of Bowen and York. The new solution is
related, in a precise form, with the extrinsic curvature of a Kerr slice. We
study these new in... | [
{
"created": "Fri, 18 Jan 2002 17:24:37 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Dain",
"S.",
"",
"AEI"
],
[
"Lousto",
"C. O.",
"",
"AEI-UTBrownsville"
],
[
"Takahashi",
"R.",
"",
"TAC-Copenhagen"
]
] | We obtain an explicit solution of the momentum constraint for conformally flat, maximal slicing, initial data which gives an alternative to the purely longitudinal extrinsic curvature of Bowen and York. The new solution is related, in a precise form, with the extrinsic curvature of a Kerr slice. We study these new init... |
1807.09699 | Igor Khavkine | Igor Khavkine | IDEAL characterization of higher dimensional spherically symmetric black
holes | v2: 16 pages, close to published version; v1: 15 pages | Class. Quantum Grav. 36 (2019) 045001 | 10.1088/1361-6382/aafcf1 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In general relativity, an IDEAL (Intrinsic, Deductive, Explicit, ALgorithmic)
characterization of a reference spacetime metric $g_0$ consists of a set of
tensorial equations $T[g]=0$, constructed covariantly out of the metric $g$,
its Riemann curvature and their derivatives, that are satisfied if and only if
$g$ is l... | [
{
"created": "Wed, 25 Jul 2018 16:24:41 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Sep 2019 09:41:08 GMT",
"version": "v2"
}
] | 2019-09-20 | [
[
"Khavkine",
"Igor",
""
]
] | In general relativity, an IDEAL (Intrinsic, Deductive, Explicit, ALgorithmic) characterization of a reference spacetime metric $g_0$ consists of a set of tensorial equations $T[g]=0$, constructed covariantly out of the metric $g$, its Riemann curvature and their derivatives, that are satisfied if and only if $g$ is loc... |
1605.01037 | Salvatore Vitale | Salvatore Vitale | Multi-band gravitational-wave astronomy: parameter estimation and tests
of general relativity with space and ground-based detectors | null | Phys. Rev. Lett. 117, 051102 (2016) | 10.1103/PhysRevLett.117.051102 | LIGO P1600138 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the discovery of the black hole binary (BBH) coalescence GW150914 the
era of gravitational-wave (GW) astronomy has started. It has recently been
shown that BBH with masses comparable to or higher than GW150914 would be
visible in the eLISA band a few years before they finally merge in the band of
ground-based de... | [
{
"created": "Tue, 3 May 2016 19:32:09 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jun 2016 03:44:26 GMT",
"version": "v2"
}
] | 2017-03-02 | [
[
"Vitale",
"Salvatore",
""
]
] | With the discovery of the black hole binary (BBH) coalescence GW150914 the era of gravitational-wave (GW) astronomy has started. It has recently been shown that BBH with masses comparable to or higher than GW150914 would be visible in the eLISA band a few years before they finally merge in the band of ground-based dete... |
gr-qc/0510128 | Jos\'e Cleriston Campos de Souza Mr | J. C. C. Souza, A. Saa | Phase space solutions in scalar-tensor cosmological models | revtex, 2 pages, 4 eps figures, to appear in Brazilian Journal of
Physics (proceedings of the Conference 100 Years of Relativity, Sao Paulo,
Brazil, August 2005) | Braz.J.Phys. 35 (2005) 1041-1043 | null | null | gr-qc | null | An analysis of the solutions for the field equations of generalized
scalar-tensor theories of gravitation is performed through the study of the
geometry of the phase space and the stability of the solutions, with special
interest in the Brans-Dicke model. Particularly, we believe to be possible to
find suitable forms... | [
{
"created": "Mon, 31 Oct 2005 17:50:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Souza",
"J. C. C.",
""
],
[
"Saa",
"A.",
""
]
] | An analysis of the solutions for the field equations of generalized scalar-tensor theories of gravitation is performed through the study of the geometry of the phase space and the stability of the solutions, with special interest in the Brans-Dicke model. Particularly, we believe to be possible to find suitable forms o... |
2007.00227 | Alana Carolina Lima Dos Santos | A. C. L. Santos, C. R. Muniz and L. T. Oliveira | Casimir Effect in a Schwarzschild-Like Wormhole Spacetime | 15 pages, 2 figures | null | 10.1142/S0218271821500322 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate the role of gravito-inertial effects on the
Casimir energy of a massless scalar field confined between two parallel plates
orbiting a static and zero tidal Schwarzschild-like wormhole, at zero
temperature. Firstly, we obtain the metric in isotropic coordinates, finding
the allowed angula... | [
{
"created": "Wed, 1 Jul 2020 04:28:07 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Jul 2020 11:59:26 GMT",
"version": "v2"
},
{
"created": "Sat, 27 Feb 2021 23:23:28 GMT",
"version": "v3"
}
] | 2021-03-02 | [
[
"Santos",
"A. C. L.",
""
],
[
"Muniz",
"C. R.",
""
],
[
"Oliveira",
"L. T.",
""
]
] | In this paper, we investigate the role of gravito-inertial effects on the Casimir energy of a massless scalar field confined between two parallel plates orbiting a static and zero tidal Schwarzschild-like wormhole, at zero temperature. Firstly, we obtain the metric in isotropic coordinates, finding the allowed angular ... |
gr-qc/0106065 | Christodoulakis Theodosios | T. Christodoulakis, T. Gakis, G.O. Papadopoulos | Conditional Symmetries and the Quantization of Bianchi Type I Vacuum
Cosmologies with and without Cosmological Constant | LaTeX, 13 Pages | Class.Quant.Grav.19:1013-1026,2002 | 10.1088/0264-9381/19/6/301 | UA/NPPS-5-2001 | gr-qc | null | In this work, the quantization of the most general Bianchi Type I geometry,
with and without a cosmological constant, is considered. In the spirit of
identifying and subsequently removing as many gauge degrees of freedom as
possible, a reduction of the initial 6--dimensional configuration space is
presented. This red... | [
{
"created": "Thu, 21 Jun 2001 10:13:52 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Nov 2001 12:48:20 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Dec 2001 10:49:53 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Christodoulakis",
"T.",
""
],
[
"Gakis",
"T.",
""
],
[
"Papadopoulos",
"G. O.",
""
]
] | In this work, the quantization of the most general Bianchi Type I geometry, with and without a cosmological constant, is considered. In the spirit of identifying and subsequently removing as many gauge degrees of freedom as possible, a reduction of the initial 6--dimensional configuration space is presented. This reduc... |
1308.3659 | Walter Simon | David Fajman and Walter Simon | Area inequalities for stable marginally outer trapped surfaces in
Einstein-Maxwell-dilaton theory | minor changes to v2 | Adv. Theor. Math. Phys. 18, 687-707 (2014) | null | UWThPh-2013-18 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove area inequalities for stable marginally outer trapped surfaces in
Einstein-Maxwell-dilaton theory. Our inspiration comes on the one hand from a
corresponding upper bound for the area in terms of the charges obtained
recently by Dain, Jaramillo and Reiris [1] in the pure Einstein-Maxwell case
without symmetri... | [
{
"created": "Fri, 16 Aug 2013 16:02:28 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Aug 2013 12:05:56 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Oct 2014 12:31:29 GMT",
"version": "v3"
}
] | 2015-09-01 | [
[
"Fajman",
"David",
""
],
[
"Simon",
"Walter",
""
]
] | We prove area inequalities for stable marginally outer trapped surfaces in Einstein-Maxwell-dilaton theory. Our inspiration comes on the one hand from a corresponding upper bound for the area in terms of the charges obtained recently by Dain, Jaramillo and Reiris [1] in the pure Einstein-Maxwell case without symmetries... |
0812.3200 | Laurent Freidel | Laurent Freidel | Modified gravity without new degrees of freedom | 19 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the new type of "non-metric" gravity theories introduced
independently by Bengtsson and Krasnov can in fact be reexpressed explicitely
as a metrical theory coupled to an auxiliary field. We unravel why such
theories possess only one propagating graviton by looking at the quadratic
perturbation around a f... | [
{
"created": "Wed, 17 Dec 2008 03:33:22 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Freidel",
"Laurent",
""
]
] | We show that the new type of "non-metric" gravity theories introduced independently by Bengtsson and Krasnov can in fact be reexpressed explicitely as a metrical theory coupled to an auxiliary field. We unravel why such theories possess only one propagating graviton by looking at the quadratic perturbation around a fix... |
gr-qc/0405120 | Valery Gavrilov | J.-M. Alimi, V. R. Gavrilov and V. N. Melnikov | Multicomponent perfect fluid with variable parameters in n Ricci-flat
spaces | 12 pages | J.Korean Phys.Soc. 45 (2004) S148-S154 | null | null | gr-qc | null | D-dimensional cosmological model describing the evolution of a multicomponent
perfect fluid with variable barotropic parameters in n Ricci-flat spaces is
investigated. The equations of motion are integrated for the case, when each
component possesses an isotropic pressure with respect to all spaces. Exact
solutions a... | [
{
"created": "Mon, 24 May 2004 05:39:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Alimi",
"J. -M.",
""
],
[
"Gavrilov",
"V. R.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | D-dimensional cosmological model describing the evolution of a multicomponent perfect fluid with variable barotropic parameters in n Ricci-flat spaces is investigated. The equations of motion are integrated for the case, when each component possesses an isotropic pressure with respect to all spaces. Exact solutions are... |
2001.08750 | Alexandru Lupsasca | Elizabeth Himwich, Michael D. Johnson, Alexandru Lupsasca, Andrew
Strominger | Universal Polarimetric Signatures of the Black Hole Photon Ring | 13 pages, 4 figures | Phys. Rev. D 101, 084020 (2020) | 10.1103/PhysRevD.101.084020 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole images present an annular region of enhanced brightness. In the
absence of propagation effects, this "photon ring" has universal features that
are completely governed by general relativity and independent of the details of
the emission. Here, we show that the polarimetric image of a black hole also
display... | [
{
"created": "Thu, 23 Jan 2020 19:00:00 GMT",
"version": "v1"
}
] | 2020-04-15 | [
[
"Himwich",
"Elizabeth",
""
],
[
"Johnson",
"Michael D.",
""
],
[
"Lupsasca",
"Alexandru",
""
],
[
"Strominger",
"Andrew",
""
]
] | Black hole images present an annular region of enhanced brightness. In the absence of propagation effects, this "photon ring" has universal features that are completely governed by general relativity and independent of the details of the emission. Here, we show that the polarimetric image of a black hole also displays ... |
gr-qc/0407058 | Evgeny Sorkin | Barak Kol and Evgeny Sorkin | On Black-Brane Instability In an Arbitrary Dimension | 1+14 pages, 2 eps figures. Replaced with the published version | Class.Quant.Grav.21:4793-4804,2004 | 10.1088/0264-9381/21/21/003 | null | gr-qc hep-th | null | The black-hole black-string system is known to exhibit critical dimensions
and therefore it is interesting to vary the spacetime dimension $D$, treating
it as a parameter of the system. We derive the large $D$ asymptotics of the
critical, i.e. marginally stable, string following an earlier numerical
analysis. For a b... | [
{
"created": "Thu, 15 Jul 2004 18:20:26 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Nov 2004 07:31:55 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Kol",
"Barak",
""
],
[
"Sorkin",
"Evgeny",
""
]
] | The black-hole black-string system is known to exhibit critical dimensions and therefore it is interesting to vary the spacetime dimension $D$, treating it as a parameter of the system. We derive the large $D$ asymptotics of the critical, i.e. marginally stable, string following an earlier numerical analysis. For a bac... |
2405.03902 | Lucas C\'eleri | Marcos L. W. Basso, Jonas Maziero and Lucas Chibebe C\'eleri | Quantum fluctuation theorem in a curved spacetime | null | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | The interplay between thermodynamics, general relativity and quantum
mechanics has long intrigued researchers. Recently, important advances have
been obtained in thermodynamics, mainly regarding its application to the
quantum domain through fluctuation theorems. In this letter, we apply Fermi
normal coordinates to re... | [
{
"created": "Mon, 6 May 2024 23:16:50 GMT",
"version": "v1"
}
] | 2024-05-08 | [
[
"Basso",
"Marcos L. W.",
""
],
[
"Maziero",
"Jonas",
""
],
[
"Céleri",
"Lucas Chibebe",
""
]
] | The interplay between thermodynamics, general relativity and quantum mechanics has long intrigued researchers. Recently, important advances have been obtained in thermodynamics, mainly regarding its application to the quantum domain through fluctuation theorems. In this letter, we apply Fermi normal coordinates to repo... |
2210.01833 | Pedro V. P. Cunha | P. Cunha, C. Herdeiro, E. Radu, Ya. Shnir | Two boson stars in equilibrium | 22 pages, 8 figures; Some data can be found in
http://gravitation.web.ua.pt/node/4065 | null | 10.1103/PhysRevD.106.124039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct and explore the solution space of two non-spinning, mini-boson
stars in equilibrium, in fully non-linear General Relativity (GR), minimally
coupled to a free, massive, complex scalar field. The equilibrium is due to the
balance between the (long range) gravitational attraction and the (short-range)
scala... | [
{
"created": "Tue, 4 Oct 2022 18:06:21 GMT",
"version": "v1"
}
] | 2023-01-11 | [
[
"Cunha",
"P.",
""
],
[
"Herdeiro",
"C.",
""
],
[
"Radu",
"E.",
""
],
[
"Shnir",
"Ya.",
""
]
] | We construct and explore the solution space of two non-spinning, mini-boson stars in equilibrium, in fully non-linear General Relativity (GR), minimally coupled to a free, massive, complex scalar field. The equilibrium is due to the balance between the (long range) gravitational attraction and the (short-range) scalar ... |
1908.06050 | Archisman Ghosh | Rachel Gray, Ignacio Maga\~na Hernandez, Hong Qi, Ankan Sur, Patrick
R. Brady, Hsin-Yu Chen, Will M. Farr, Maya Fishbach, Jonathan R. Gair,
Archisman Ghosh, Daniel E. Holz, Simone Mastrogiovanni, Christopher
Messenger, Dani\`ele A. Steer, John Veitch | Cosmological Inference using Gravitational Wave Standard Sirens: A Mock
Data Challenge | 19 pages, 8 figures | Phys. Rev. D 101, 122001 (2020) | 10.1103/PhysRevD.101.122001 | LIGO-P1900017 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observation of binary neutron star merger GW170817, along with its
optical counterpart, provided the first constraint on the Hubble constant $H_0$
using gravitational wave standard sirens. When no counterpart is identified, a
galaxy catalog can be used to provide the necessary redshift information.
However, the t... | [
{
"created": "Fri, 16 Aug 2019 16:30:53 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Aug 2019 16:45:59 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Oct 2019 17:57:23 GMT",
"version": "v3"
},
{
"created": "Fri, 12 Jun 2020 17:10:36 GMT",
"version": "v4"
}
] | 2020-06-15 | [
[
"Gray",
"Rachel",
""
],
[
"Hernandez",
"Ignacio Magaña",
""
],
[
"Qi",
"Hong",
""
],
[
"Sur",
"Ankan",
""
],
[
"Brady",
"Patrick R.",
""
],
[
"Chen",
"Hsin-Yu",
""
],
[
"Farr",
"Will M.",
""
],
[
"F... | The observation of binary neutron star merger GW170817, along with its optical counterpart, provided the first constraint on the Hubble constant $H_0$ using gravitational wave standard sirens. When no counterpart is identified, a galaxy catalog can be used to provide the necessary redshift information. However, the tru... |
gr-qc/9912050 | Jose M. M. Senovilla | J. M. M. Senovilla | Applications of Super-Energy Tensors | 10 pages, no figures, LaTeX. Contribution to appear in the
Proceedings of the Spanish Relativity Meeting ERE-99 | null | null | null | gr-qc | null | In this contribution I intend to give a summary of the new relevant results
obtained by using the general superenergy tensors. After a quick review of the
definition and properties of these tensors, several of their mathematical and
physical applications are presented. In particular, their interest and
usefulness is ... | [
{
"created": "Mon, 13 Dec 1999 20:03:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Senovilla",
"J. M. M.",
""
]
] | In this contribution I intend to give a summary of the new relevant results obtained by using the general superenergy tensors. After a quick review of the definition and properties of these tensors, several of their mathematical and physical applications are presented. In particular, their interest and usefulness is me... |
2308.12990 | Shahar Hod | Shahar Hod | Analytic study of the Maxwell electromagnetic invariant in spinning and
charged Kerr-Newman black-hole spacetimes | 20 pages | Journal of High Energy Physics 09, 140 (2023) | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The Maxwell invariant plays a fundamental role in the mathematical
description of electromagnetic fields in charged spacetimes. We present a
detailed {\it analytical} study of the physical and mathematical properties of
the Maxwell electromagnetic invariant ${\cal F}_{\text{KN}}(r,\theta;M,a,Q)$
which characterizes t... | [
{
"created": "Thu, 24 Aug 2023 18:00:02 GMT",
"version": "v1"
}
] | 2023-09-27 | [
[
"Hod",
"Shahar",
""
]
] | The Maxwell invariant plays a fundamental role in the mathematical description of electromagnetic fields in charged spacetimes. We present a detailed {\it analytical} study of the physical and mathematical properties of the Maxwell electromagnetic invariant ${\cal F}_{\text{KN}}(r,\theta;M,a,Q)$ which characterizes the... |
0806.4640 | Florian Conrady | Florian Conrady and Laurent Freidel (Perimeter Inst. Theor. Phys.) | Path integral representation of spin foam models of 4d gravity | 29 pages, 6 figures | Class.Quant.Grav.25:245010,2008 | 10.1088/0264-9381/25/24/245010 | PI-QG-84 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a unified description of all recent spin foam models introduced by
Engle, Livine, Pereira and Rovelli (ELPR) and by Freidel and Krasnov (FK). We
show that the FK models are, for all values of the Immirzi parameter,
equivalent to path integrals of a discrete theory and we provide an explicit
formula for the as... | [
{
"created": "Sat, 28 Jun 2008 01:42:19 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Conrady",
"Florian",
"",
"Perimeter Inst. Theor. Phys."
],
[
"Freidel",
"Laurent",
"",
"Perimeter Inst. Theor. Phys."
]
] | We give a unified description of all recent spin foam models introduced by Engle, Livine, Pereira and Rovelli (ELPR) and by Freidel and Krasnov (FK). We show that the FK models are, for all values of the Immirzi parameter, equivalent to path integrals of a discrete theory and we provide an explicit formula for the asso... |
2207.13369 | Priti Gupta | Priti Gupta, Takafumi Kakehi, Takahiro Tanaka | Resonant jumps induced by stationary tidal perturbation: a two-for-one
deal | 9 pages, 1 figure, submitted to Class. Quantum Grav | null | 10.1088/1361-6382/aca1a3 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Extreme-mass-ratio inspirals (EMRIs) are promising target sources for
space-based interferometers such as LISA, Taiji, and Tianqin. Depending on the
astrophysical environment, such as close perturbers or an accretion disk, EMRI
orbital evolution may deviate from the predictions of general relativity in
vacuum. In par... | [
{
"created": "Wed, 27 Jul 2022 08:50:12 GMT",
"version": "v1"
}
] | 2022-11-30 | [
[
"Gupta",
"Priti",
""
],
[
"Kakehi",
"Takafumi",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | Extreme-mass-ratio inspirals (EMRIs) are promising target sources for space-based interferometers such as LISA, Taiji, and Tianqin. Depending on the astrophysical environment, such as close perturbers or an accretion disk, EMRI orbital evolution may deviate from the predictions of general relativity in vacuum. In parti... |
1201.2247 | Colin Cunliff | Colin Cunliff | Conformal fluctuations do not establish a minimum length | null | Class. Quant. Grav. 29 (2012) 207001 | 10.1088/0264-9381/29/20/207001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper corrects an earlier work suggesting that the quantum expectation
value of the proper length is bounded from below by the Planck length. The
original calculation examined fluctuations of the conformal factor of
Einstein-Hilbert gravity. However, in Einstein-Hilbert gravity, the conformal
factor is not a dyn... | [
{
"created": "Wed, 11 Jan 2012 05:55:54 GMT",
"version": "v1"
}
] | 2013-01-04 | [
[
"Cunliff",
"Colin",
""
]
] | This paper corrects an earlier work suggesting that the quantum expectation value of the proper length is bounded from below by the Planck length. The original calculation examined fluctuations of the conformal factor of Einstein-Hilbert gravity. However, in Einstein-Hilbert gravity, the conformal factor is not a dynam... |
1804.02989 | Mohammad Malekjani | I. A. Akhlaghi, M. Malekjani, S. Basilakos and H. Haghi | Model selection and constraints from Holographic dark energy scenarios | 13 Pages, 7 Figures and 9 Tables. Accepted in MNRAS | MNRAS 477(3), 3659 (2018) | 10.1093/mnras/sty903 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study we combine the expansion and the growth data in order to
investigate the ability of the three most popular holographic dark energy
models, namely event future horizon, Ricci scale and Granda-Oliveros IR
cutoffs, to fit the data. Using a standard $\chi^2$ minimization method we
place tight constraints on... | [
{
"created": "Thu, 5 Apr 2018 18:36:03 GMT",
"version": "v1"
}
] | 2018-06-19 | [
[
"Akhlaghi",
"I. A.",
""
],
[
"Malekjani",
"M.",
""
],
[
"Basilakos",
"S.",
""
],
[
"Haghi",
"H.",
""
]
] | In this study we combine the expansion and the growth data in order to investigate the ability of the three most popular holographic dark energy models, namely event future horizon, Ricci scale and Granda-Oliveros IR cutoffs, to fit the data. Using a standard $\chi^2$ minimization method we place tight constraints on t... |
1402.6026 | Diego Carranza Diego Carranza | D.A. Carranza and S. Mendoza | Modified Newtonian Dynamics as an entropic force | 6 pages. Accepted for publication in Journal of Modern Physics (JMP) | Journal of Modern Physics, 2015, 6, 786-793 | 10.4236/jmp.2015.66084 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Under natural assumptions on the thermodynamic properties of space and time
with the holographic principle we reproduce a MOND-like behaviour of gravity on
particular scales of mass and length, where Newtonian gravity requires a
modification or extension if no dark matter component is introduced in the
description of... | [
{
"created": "Tue, 25 Feb 2014 00:45:13 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jun 2014 19:43:22 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Jun 2015 05:05:42 GMT",
"version": "v3"
},
{
"created": "Wed, 14 Oct 2015 20:53:08 GMT",
"version": "v4"
}
] | 2015-10-16 | [
[
"Carranza",
"D. A.",
""
],
[
"Mendoza",
"S.",
""
]
] | Under natural assumptions on the thermodynamic properties of space and time with the holographic principle we reproduce a MOND-like behaviour of gravity on particular scales of mass and length, where Newtonian gravity requires a modification or extension if no dark matter component is introduced in the description of g... |
2207.08004 | Paul Halpern | Hootan Amani and Paul Halpern | Energy conditions in a modified Brans-Dicke theory | 20 pages, 5 figures | General Relativity and Gravitation 54, 64 (2022) | 10.1007/s10714-022-02950-3 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider a modified version of Brans-Dicke theory (MBDT) in four
dimensions obtained by applying the induced matter method of Wesson to a 5D
generalized Brans-Dicke theory. In 5D the model consists of pure vacuum, with
no self-interacting potential, except for a scalar field. Constraining the 5D
geometry to be a g... | [
{
"created": "Sat, 16 Jul 2022 19:32:47 GMT",
"version": "v1"
}
] | 2022-07-19 | [
[
"Amani",
"Hootan",
""
],
[
"Halpern",
"Paul",
""
]
] | We consider a modified version of Brans-Dicke theory (MBDT) in four dimensions obtained by applying the induced matter method of Wesson to a 5D generalized Brans-Dicke theory. In 5D the model consists of pure vacuum, with no self-interacting potential, except for a scalar field. Constraining the 5D geometry to be a gen... |
gr-qc/0012034 | Ronald W. Hellings | Ronald W. Hellings | Data Processing for LISA's Laser Interferometer Tracking System (LITS) | 5 pages, Proceedings of the Third LISA Symposium (Golm, Germany,
2000) | Class.Quant.Grav. 18 (2001) 4075-4080 | 10.1088/0264-9381/18/19/315 | null | gr-qc | null | The purpose of this paper is twofold. First, we will present recent results
on the data processing for LISA, including algorithms for elimination of clock
jitter noise and discussion of the generation of the data averages that will
eventually need to be telemetered to the ground. Second, we will argue, based
partly o... | [
{
"created": "Fri, 8 Dec 2000 23:54:20 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Hellings",
"Ronald W.",
""
]
] | The purpose of this paper is twofold. First, we will present recent results on the data processing for LISA, including algorithms for elimination of clock jitter noise and discussion of the generation of the data averages that will eventually need to be telemetered to the ground. Second, we will argue, based partly on ... |
1203.3454 | Bahram Mashhoon | D. Bini, C. Chicone, B. Mashhoon | Spacetime Splitting, Admissible Coordinates and Causality | 25 pages, 3 figures; v2: minor typos corrected, accepted for
publication in Phys. Rev. D | Phys.Rev.D85:104020,2012 | 10.1103/PhysRevD.85.104020 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To confront relativity theory with observation, it is necessary to split
spacetime into its temporal and spatial components. The (1+3) timelike
threading approach involves restrictions on the gravitational potentials
$(g_{\mu \nu})$, while the (3+1) spacelike slicing approach involves
restrictions on $(g^{\mu \nu})$.... | [
{
"created": "Thu, 15 Mar 2012 19:46:33 GMT",
"version": "v1"
},
{
"created": "Wed, 9 May 2012 21:59:19 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Bini",
"D.",
""
],
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
]
] | To confront relativity theory with observation, it is necessary to split spacetime into its temporal and spatial components. The (1+3) timelike threading approach involves restrictions on the gravitational potentials $(g_{\mu \nu})$, while the (3+1) spacelike slicing approach involves restrictions on $(g^{\mu \nu})$. T... |
gr-qc/0507035 | Etienne Takou | Etienne Takou and Norbert Noutchegueme | Global existence of solutions for the relativistic Boltzmann equation on
the flat Robertson-Walker space-time for arbitrarily large intial data | null | null | null | null | gr-qc | null | We prove a global result in time for the initial value problem for the
relativistic Boltzmann equation on the flat Robertson-Walker sapace time, in
the functional framework appropriate to the coupling with Einstein's equations.
We had nowhere to restrict the size of the initial data which can hence be
taken arbitrari... | [
{
"created": "Fri, 8 Jul 2005 08:36:14 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Mar 2006 10:38:54 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Takou",
"Etienne",
""
],
[
"Noutchegueme",
"Norbert",
""
]
] | We prove a global result in time for the initial value problem for the relativistic Boltzmann equation on the flat Robertson-Walker sapace time, in the functional framework appropriate to the coupling with Einstein's equations. We had nowhere to restrict the size of the initial data which can hence be taken arbitrarily... |
1710.01815 | Andr\'es Ace\~na | Andr\'es Ace\~na, Ericson L\'opez and Mario Llerena | Isoperimetric surfaces and area-angular momentum inequality in a
rotating black hole in New Massive Gravity | 9 pages, no figures | Phys. Rev. D 97, 064043 (2018) | 10.1103/PhysRevD.97.064043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the existence and stability of isoperimetric surfaces in a family of
rotating black holes in New Massive Gravity. We show that the stability of such
surfaces is determined by the sign of the hair parameter. We use the
isoperimetric surfaces to find a geometric inequality between the area and the
angular mome... | [
{
"created": "Wed, 4 Oct 2017 21:41:26 GMT",
"version": "v1"
}
] | 2018-04-04 | [
[
"Aceña",
"Andrés",
""
],
[
"López",
"Ericson",
""
],
[
"Llerena",
"Mario",
""
]
] | We study the existence and stability of isoperimetric surfaces in a family of rotating black holes in New Massive Gravity. We show that the stability of such surfaces is determined by the sign of the hair parameter. We use the isoperimetric surfaces to find a geometric inequality between the area and the angular moment... |
2307.02084 | ChengGang Shao | Cai-Ying Shao, Yu Hu, Cheng-Gang Shao | Parameter estimation for Einstein-dilaton-Gauss-Bonnet gravity with
ringdown signals | to be published in Chinese Physics C | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Future space-based gravitational-wave detectors will detect gravitational
waves with high sensitivity in the millihertz frequency band, which provides
more opportunities to test theories of gravity than ground-based ones. The
study of quasinormal modes (QNMs) and their application to testing gravity
theories have bee... | [
{
"created": "Wed, 5 Jul 2023 07:47:33 GMT",
"version": "v1"
}
] | 2023-07-06 | [
[
"Shao",
"Cai-Ying",
""
],
[
"Hu",
"Yu",
""
],
[
"Shao",
"Cheng-Gang",
""
]
] | Future space-based gravitational-wave detectors will detect gravitational waves with high sensitivity in the millihertz frequency band, which provides more opportunities to test theories of gravity than ground-based ones. The study of quasinormal modes (QNMs) and their application to testing gravity theories have been ... |
1008.4061 | Luke Butcher | Luke M. Butcher, Michael Hobson, Anthony Lasenby | Localizing the Energy and Momentum of Linear Gravity | 20 pages, 3 figures, published in Phys. Rev. D | Phys.Rev.D82:104040,2010 | 10.1103/PhysRevD.82.104040 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A framework is developed which quantifies the local exchange of energy and
momentum between matter and the linearized gravitational field. We derive the
unique gravitational energy-momentum tensor consistent with this description,
and find that this tensor only exists in the harmonic gauge. Consequently,
nearly all t... | [
{
"created": "Tue, 24 Aug 2010 14:55:05 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Nov 2010 16:16:02 GMT",
"version": "v2"
}
] | 2010-11-26 | [
[
"Butcher",
"Luke M.",
""
],
[
"Hobson",
"Michael",
""
],
[
"Lasenby",
"Anthony",
""
]
] | A framework is developed which quantifies the local exchange of energy and momentum between matter and the linearized gravitational field. We derive the unique gravitational energy-momentum tensor consistent with this description, and find that this tensor only exists in the harmonic gauge. Consequently, nearly all the... |
0902.1127 | Pablo Laguna | Tanja Bode, Pablo Laguna, Deirdre M. Shoemaker, Ian Hinder, Frank
Herrmann, Birjoo Vaishnav | Binary black hole evolutions of approximate puncture initial data | null | Phys.Rev.D80:024008,2009 | 10.1103/PhysRevD.80.024008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Approximate solutions to the Einstein field equations are a valuable tool to
investigate gravitational phenomena. An important aspect of any approximation
is to investigate and quantify its regime of validity. We present a study that
evaluates the effects that approximate puncture initial data, based on
"skeleton" so... | [
{
"created": "Fri, 6 Feb 2009 16:09:48 GMT",
"version": "v1"
}
] | 2009-09-02 | [
[
"Bode",
"Tanja",
""
],
[
"Laguna",
"Pablo",
""
],
[
"Shoemaker",
"Deirdre M.",
""
],
[
"Hinder",
"Ian",
""
],
[
"Herrmann",
"Frank",
""
],
[
"Vaishnav",
"Birjoo",
""
]
] | Approximate solutions to the Einstein field equations are a valuable tool to investigate gravitational phenomena. An important aspect of any approximation is to investigate and quantify its regime of validity. We present a study that evaluates the effects that approximate puncture initial data, based on "skeleton" solu... |
gr-qc/0011055 | Akihiro Ishibashi | Gary W. Gibbons and Akihiro Ishibashi | Convex Functions and Spacetime Geometry | 26 pages, latex, 7 figures, improved version. some claims removed,
references added | Class.Quant.Grav.18:4607-4628,2001 | 10.1088/0264-9381/18/21/314 | YITP-00-54, DAMTP-2000-116 | gr-qc hep-th math.DG | null | Convexity and convex functions play an important role in theoretical physics.
To initiate a study of the possible uses of convex functions in General
Relativity, we discuss the consequences of a spacetime $(M,g_{\mu \nu})$ or an
initial data set $(\Sigma, h_{ij}, K_{ij})$ admitting a suitably defined convex
function.... | [
{
"created": "Wed, 15 Nov 2000 19:47:20 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Sep 2001 14:23:21 GMT",
"version": "v2"
}
] | 2009-10-07 | [
[
"Gibbons",
"Gary W.",
""
],
[
"Ishibashi",
"Akihiro",
""
]
] | Convexity and convex functions play an important role in theoretical physics. To initiate a study of the possible uses of convex functions in General Relativity, we discuss the consequences of a spacetime $(M,g_{\mu \nu})$ or an initial data set $(\Sigma, h_{ij}, K_{ij})$ admitting a suitably defined convex function. W... |
2108.12103 | Puskar Mondal | Vincent Moncrief, Puskar Mondal | Einstein flow with matter sources: stability and convergence | 20 pages. arXiv admin note: text overlap with arXiv:1903.00323,
arXiv:1911.01233 | null | 10.1098/rsta.2021.0190 | null | gr-qc astro-ph.CO math-ph math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | Two recent articles \cite{ashtekar2015general, moncrief2019could} suggested
an interesting dynamical mechanism within the framework of the vacuum Einstein
flow (or Einstein-$\Lambda$ flow if a positive cosmological constant $\Lambda$
is included) which suggests that many closed (compact without boundary)
manifolds th... | [
{
"created": "Fri, 27 Aug 2021 03:09:36 GMT",
"version": "v1"
}
] | 2022-03-23 | [
[
"Moncrief",
"Vincent",
""
],
[
"Mondal",
"Puskar",
""
]
] | Two recent articles \cite{ashtekar2015general, moncrief2019could} suggested an interesting dynamical mechanism within the framework of the vacuum Einstein flow (or Einstein-$\Lambda$ flow if a positive cosmological constant $\Lambda$ is included) which suggests that many closed (compact without boundary) manifolds that... |
2212.00529 | Swagat Saurav Mishra | Siddharth S. Bhatt, Swagat S. Mishra, Soumen Basak, Surya N. Sahoo | Numerical simulations of inflationary dynamics: slow roll and beyond | 40 pages, 19 figures, GitHub link to codes provided in the paper,
revised version | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Numerical simulations of the inflationary dynamics are presented here for a
single canonical scalar field minimally coupled to gravity. We spell out the
basic equations governing the inflationary dynamics in terms of cosmic time $t$
and define a set of dimensionless variables convenient for numerical analysis.
We the... | [
{
"created": "Thu, 1 Dec 2022 14:36:04 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Feb 2024 04:10:02 GMT",
"version": "v2"
}
] | 2024-02-21 | [
[
"Bhatt",
"Siddharth S.",
""
],
[
"Mishra",
"Swagat S.",
""
],
[
"Basak",
"Soumen",
""
],
[
"Sahoo",
"Surya N.",
""
]
] | Numerical simulations of the inflationary dynamics are presented here for a single canonical scalar field minimally coupled to gravity. We spell out the basic equations governing the inflationary dynamics in terms of cosmic time $t$ and define a set of dimensionless variables convenient for numerical analysis. We then ... |
gr-qc/0108056 | Maurice H. P. M. van Putten | Maurice H.P.M. van Putten | Past and future gauge in numerical relativity | To appear in Class Quantum Grav, Lett | Class.Quant.Grav.19:L31-L36,2002 | 10.1088/0264-9381/19/6/101 | null | gr-qc | null | Numerical relativity describes a discrete initial value problem for general
relativity. A choice of gauge involves slicing space-time into space-like
hypersurfaces. This introduces past and future gauge relative to the
hypersurface of present time. Here, we propose solving the discretized Einstein
equations with a ch... | [
{
"created": "Thu, 23 Aug 2001 16:13:43 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Feb 2002 23:38:23 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"van Putten",
"Maurice H. P. M.",
""
]
] | Numerical relativity describes a discrete initial value problem for general relativity. A choice of gauge involves slicing space-time into space-like hypersurfaces. This introduces past and future gauge relative to the hypersurface of present time. Here, we propose solving the discretized Einstein equations with a choi... |
2012.02375 | Yun Soo Myung | Yun Soo Myung, De-Cheng Zou | Onset of rotating scalarized black holes in Einstein-Chern-Simons-Scalar
theory | 12 pages, 3 figures | null | 10.1016/j.physletb.2021.136081 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform the stability analysis of the Kerr black hole in the
Einstein-Chern-Simons-Scalar theory with quadratic scalar coupling. For
positive coupling parameter ($\alpha>0$), we introduce the (2+1)-dimensional
hyperboloidal foliation method to show that the Kerr black hole is unstable
against scalar-mode perturbat... | [
{
"created": "Fri, 4 Dec 2020 02:57:30 GMT",
"version": "v1"
}
] | 2021-01-20 | [
[
"Myung",
"Yun Soo",
""
],
[
"Zou",
"De-Cheng",
""
]
] | We perform the stability analysis of the Kerr black hole in the Einstein-Chern-Simons-Scalar theory with quadratic scalar coupling. For positive coupling parameter ($\alpha>0$), we introduce the (2+1)-dimensional hyperboloidal foliation method to show that the Kerr black hole is unstable against scalar-mode perturbatio... |
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