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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2309.00970 | Qian Hu | Qian Hu, John Veitch | Rapid pre-merger localization of binary neutron stars in third
generation gravitational wave detectors | 8 pages, 5 figures. Accepted version. Data release available | Astrophys.J.Lett. 958 (2023) 2, L43 | 10.3847/2041-8213/ad0ed4 | ET-0289A-23 | gr-qc astro-ph.HE astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | Pre-merger localization of binary neutron stars (BNSs) is one of the most
important scientific goals for the third generation (3G) gravitational wave
(GW) detectors. It will enable the electromagnetic observation of the whole
process of BNS coalescence, especially for the pre-merger and merger phases
which have not b... | [
{
"created": "Sat, 2 Sep 2023 15:55:37 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Nov 2023 16:14:13 GMT",
"version": "v2"
}
] | 2024-01-02 | [
[
"Hu",
"Qian",
""
],
[
"Veitch",
"John",
""
]
] | Pre-merger localization of binary neutron stars (BNSs) is one of the most important scientific goals for the third generation (3G) gravitational wave (GW) detectors. It will enable the electromagnetic observation of the whole process of BNS coalescence, especially for the pre-merger and merger phases which have not bee... |
2404.02220 | Sung-Jin Oh | Jonathan Luk and Sung-Jin Oh | Late time tail of waves on dynamic asymptotically flat spacetimes of odd
space dimensions | 180 pages | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a general method for understanding the late time tail for
solutions to wave equations on asymptotically flat spacetimes with odd space
dimensions. In particular, for a large class of equations, we prove that the
precise late time tail is determined by the limits of higher radiation field at
future null i... | [
{
"created": "Tue, 2 Apr 2024 18:13:41 GMT",
"version": "v1"
}
] | 2024-04-04 | [
[
"Luk",
"Jonathan",
""
],
[
"Oh",
"Sung-Jin",
""
]
] | We introduce a general method for understanding the late time tail for solutions to wave equations on asymptotically flat spacetimes with odd space dimensions. In particular, for a large class of equations, we prove that the precise late time tail is determined by the limits of higher radiation field at future null inf... |
2212.10186 | Orlando Luongo | Kuantay Boshkayev, Orlando Luongo, Marco Muccino | Numerical analysis of quasi-periodic oscillations with spherical
spacetimes | 11 pages, 2 tables, 2 figures | null | null | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically test quasi-periodic oscillations using three
theoretically-motivated models of spacetime adopting neutron star sources.
Then, we compare our findings with a spherically-symmetric spacetime inferred
from $F(R)$ gravity, with constant curvature, showing that it fully-degenerates
with our previous metrics... | [
{
"created": "Tue, 20 Dec 2022 11:52:45 GMT",
"version": "v1"
}
] | 2022-12-21 | [
[
"Boshkayev",
"Kuantay",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Muccino",
"Marco",
""
]
] | We numerically test quasi-periodic oscillations using three theoretically-motivated models of spacetime adopting neutron star sources. Then, we compare our findings with a spherically-symmetric spacetime inferred from $F(R)$ gravity, with constant curvature, showing that it fully-degenerates with our previous metrics, ... |
1111.1613 | Do-Hyung Kim | Do-Hyung Kim | A characterization of causal automorphisms by wave equations | null | null | 10.1063/1.3698288 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A characterization of causal automorphism on Minkowski spacetime is given by
use of wave equation. The result shows that causal analysis of spacetime may be
replaced by studies of wave equation on manifolds.
| [
{
"created": "Mon, 7 Nov 2011 15:39:30 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Kim",
"Do-Hyung",
""
]
] | A characterization of causal automorphism on Minkowski spacetime is given by use of wave equation. The result shows that causal analysis of spacetime may be replaced by studies of wave equation on manifolds. |
1509.00843 | Mir Faizal | Ozan Sarg{\i}n, Mir Faizal | Violation of the Holographic Principle in the Loop Quantum Gravity | 10 pages, 0 figures, Accepted for publication in EPL | Europhys. Lett. 113, 30007 (2016) | 10.1209/0295-5075/113/30007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analyze the holographic principle using loop quantum
gravity (LQG). This will be done by using polymeric quantization for analysing
the Yurtsever's holographic bound on the entropy, which is obtained from local
quantum field theories. As the polymeric quantization is the characteristic
feature of lo... | [
{
"created": "Tue, 1 Sep 2015 21:07:19 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Feb 2016 15:11:32 GMT",
"version": "v2"
}
] | 2016-03-23 | [
[
"Sargın",
"Ozan",
""
],
[
"Faizal",
"Mir",
""
]
] | In this paper, we analyze the holographic principle using loop quantum gravity (LQG). This will be done by using polymeric quantization for analysing the Yurtsever's holographic bound on the entropy, which is obtained from local quantum field theories. As the polymeric quantization is the characteristic feature of loop... |
1009.5406 | Shahn Majid | Shahn Majid | Scaling Limit of the Noncommutative Black Hole | 13 pages, 3 figures with several pdf graphics | J.Phys.Conf.Ser.284:012003,2011 | 10.1088/1742-6596/284/1/012003 | null | gr-qc hep-th math.QA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the recent `quantum' black hole wave operator in the
$\kappa$-Minkowski or bicrossproduct model quantum spacetime has a natural
scaling limit $\lambda_p\to 0$ at the event horizon. Here $\lambda_p$ is the
Planck time and the geometry at the event horizon in Planck length is
maintained at the same time as... | [
{
"created": "Mon, 27 Sep 2010 21:57:46 GMT",
"version": "v1"
}
] | 2011-04-08 | [
[
"Majid",
"Shahn",
""
]
] | We show that the recent `quantum' black hole wave operator in the $\kappa$-Minkowski or bicrossproduct model quantum spacetime has a natural scaling limit $\lambda_p\to 0$ at the event horizon. Here $\lambda_p$ is the Planck time and the geometry at the event horizon in Planck length is maintained at the same time as t... |
gr-qc/0402043 | Motomu Tsuda | Motomu Tsuda | Graded algebraic structure in the canonical formulation of N = 3 chiral
supergravity | 15 pages, Latex | null | null | SIT-LP-04/02 | gr-qc hep-th | null | We focus on N = 3 chiral supergravity (SUGRA) which is the lowest N theory
involving a spin-1/2 field, and derive the Ashtekar's canonical formulation of
N = 3 SUGRA starting with the chiral Lagrangian constructed by closely
following the standard SUGRA. The polynomiality of constraints in terms of
canonical variable... | [
{
"created": "Tue, 10 Feb 2004 05:01:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tsuda",
"Motomu",
""
]
] | We focus on N = 3 chiral supergravity (SUGRA) which is the lowest N theory involving a spin-1/2 field, and derive the Ashtekar's canonical formulation of N = 3 SUGRA starting with the chiral Lagrangian constructed by closely following the standard SUGRA. The polynomiality of constraints in terms of canonical variables ... |
2208.03656 | Paritosh Verma | Paritosh Verma | Constraining Brans-Dicke Parameter Using Gravitational Radiation | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This article presents a theoretical limit on the Brans-Dicke (BD) parameter
using a neutron star (NS) revolving around a galactic central engine.The
assumption that the orbital radius is large enough allows to ignore strong
curvature due to the central supermassive black hole (SMBH) and treat the
problem with Newtoni... | [
{
"created": "Sun, 7 Aug 2022 06:51:08 GMT",
"version": "v1"
}
] | 2022-08-09 | [
[
"Verma",
"Paritosh",
""
]
] | This article presents a theoretical limit on the Brans-Dicke (BD) parameter using a neutron star (NS) revolving around a galactic central engine.The assumption that the orbital radius is large enough allows to ignore strong curvature due to the central supermassive black hole (SMBH) and treat the problem with Newtonian... |
gr-qc/0611045 | Luca Lusanna | Luca Lusanna (INFN, Firenze) and Massimo Pauri (Parma Univ.) | Dynamical Emergence of Instantaneous 3-Spaces in a Class of Models of
General Relativity | To appear in the book "Relativity and the Dimensionality of the
World", A. van der Merwe ed., Springer Series "Fundamental Theories of
Physics" | null | 10.1007/978-1-4020-6318-3_13 | null | gr-qc astro-ph hep-th | null | The Hamiltonian structure of General Relativity (GR), for both metric and
tetrad gravity in a definite continuous family of space-times, is fully
exploited in order to show that: i) the "Hole Argument" can be bypassed by
means of a specific "physical individuation" of point-events of the space-time
manifold $M^4$ in ... | [
{
"created": "Tue, 7 Nov 2006 12:21:17 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Lusanna",
"Luca",
"",
"INFN, Firenze"
],
[
"Pauri",
"Massimo",
"",
"Parma Univ."
]
] | The Hamiltonian structure of General Relativity (GR), for both metric and tetrad gravity in a definite continuous family of space-times, is fully exploited in order to show that: i) the "Hole Argument" can be bypassed by means of a specific "physical individuation" of point-events of the space-time manifold $M^4$ in te... |
2310.16395 | Satoshi Matsumoto | Akihiro Ishibashi, Satoshi Matsumoto, and Yuichiro Yoneo | A note on no-hair properties of static black holes in four and higher
dimensional spacetimes with cosmological constant | revised version, references added, two appendixes given for more
discussions on the Johannsen-Psaltis parametrized metrics and the relation
between the no-short hair and null circular orbit, to appear in CQG | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study no-hair properties of static black holes in four and higher
dimensional spacetimes with a cosmological constant. For the vanishing
cosmological constant case, we show a no-hair theorem and also a no-short-hair
theorem under certain conditions for the energy-momentum of matter fields. For
the positive cosmolo... | [
{
"created": "Wed, 25 Oct 2023 06:27:02 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Mar 2024 06:21:33 GMT",
"version": "v2"
}
] | 2024-03-29 | [
[
"Ishibashi",
"Akihiro",
""
],
[
"Matsumoto",
"Satoshi",
""
],
[
"Yoneo",
"Yuichiro",
""
]
] | We study no-hair properties of static black holes in four and higher dimensional spacetimes with a cosmological constant. For the vanishing cosmological constant case, we show a no-hair theorem and also a no-short-hair theorem under certain conditions for the energy-momentum of matter fields. For the positive cosmologi... |
gr-qc/9311025 | Jennie Traschen | David Kastor and Jennie Traschen | Particle Production and Positive Energy Theorems for Charged Black Holes
in deSitter | 11 pages (1 figure not included), UMHEP-399 | Class.Quant.Grav. 13 (1996) 2753-2762 | 10.1088/0264-9381/13/10/013 | null | gr-qc | null | We study quantum mechanical and classical stability properties of
Reissner-Nordstrom deSitter spacetimes, which describe black holes with mass
$M$ and charge $Q$ in a background with cosmological constant $\Lambda \ge 0$.
There are two sources of particle production in these spacetimes; the black
hole horizon and the... | [
{
"created": "Mon, 15 Nov 1993 17:11:58 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Kastor",
"David",
""
],
[
"Traschen",
"Jennie",
""
]
] | We study quantum mechanical and classical stability properties of Reissner-Nordstrom deSitter spacetimes, which describe black holes with mass $M$ and charge $Q$ in a background with cosmological constant $\Lambda \ge 0$. There are two sources of particle production in these spacetimes; the black hole horizon and the c... |
gr-qc/0009103 | S. Solodukhin | Sergey N. Solodukhin | Boundary conditions and the entropy bound | 16 pages, latex, v2: typos corrected, to appear in Phys.Rev.D | Phys.Rev. D63 (2001) 044002 | 10.1103/PhysRevD.63.044002 | SPIN-2000/22 | gr-qc cond-mat hep-th math.SP | null | The entropy-to-energy bound is examined for a quantum scalar field confined
to a cavity and satisfying Robin condition on the boundary of the cavity. It is
found that near certain points in the space of the parameter defining the
boundary condition the lowest eigenfrequency (while non-zero) becomes
arbitrarily small.... | [
{
"created": "Fri, 29 Sep 2000 11:42:55 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Sep 2000 14:23:05 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Nov 2000 13:11:59 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Solodukhin",
"Sergey N.",
""
]
] | The entropy-to-energy bound is examined for a quantum scalar field confined to a cavity and satisfying Robin condition on the boundary of the cavity. It is found that near certain points in the space of the parameter defining the boundary condition the lowest eigenfrequency (while non-zero) becomes arbitrarily small. E... |
2202.09345 | Paul Ramond | Paul Ramond and Alexandre Le Tiec | First Law of Mechanics for Spinning Compact Binaries: Dipolar Order | 44 pages, 3 figures | null | 10.1103/PhysRevD.106.044057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Building upon the Noether charge formalism of Iyer and Wald, we derive a
variational formula for spacetimes admitting a Killing vector field, for a
generic energy-momentum distribution with compact support. Applying this
general result to the particular case of a binary system of spinning compact
objects moving along... | [
{
"created": "Fri, 18 Feb 2022 18:31:19 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Ramond",
"Paul",
""
],
[
"Tiec",
"Alexandre Le",
""
]
] | Building upon the Noether charge formalism of Iyer and Wald, we derive a variational formula for spacetimes admitting a Killing vector field, for a generic energy-momentum distribution with compact support. Applying this general result to the particular case of a binary system of spinning compact objects moving along a... |
1605.07610 | Roman Pasechnik | Roman Pasechnik | Quantum Yang--Mills Dark Energy | 24 pages; invited review for the Special Issue "Modified Gravity
Cosmology: From Inflation to Dark Energy", in Universe 2 (2016) 4 | null | 10.3390/universe2010004 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short review, I discuss basic qualitative characteristics of quantum
non-Abelian gauge dynamics in the non-stationary background of the expanding
Universe in the framework of the standard Einstein--Yang--Mills formulation. A
brief outlook of existing studies of cosmological Yang--Mills fields and their
proper... | [
{
"created": "Tue, 24 May 2016 14:56:36 GMT",
"version": "v1"
}
] | 2016-05-26 | [
[
"Pasechnik",
"Roman",
""
]
] | In this short review, I discuss basic qualitative characteristics of quantum non-Abelian gauge dynamics in the non-stationary background of the expanding Universe in the framework of the standard Einstein--Yang--Mills formulation. A brief outlook of existing studies of cosmological Yang--Mills fields and their properti... |
gr-qc/9908043 | Karl Martel | Karl Martel | Detection of Gravitational Waves from Eccentric Compact Binaries | 5 pages, 2 figures, to appear in the proceedings of the 8th Canadian
Conference on General Relativity and Relativistic Astrophysics | null | 10.1063/1.1301562 | null | gr-qc | null | Coalescing compact binaries have been pointed out as the most promising
source of gravitational waves for kilometer-size interferometers such as LIGO.
Gravitational wave signals are extracted from the noise in the detectors by
matched filtering. This technique performs really well if an a priori
theoretical knowledge... | [
{
"created": "Fri, 13 Aug 1999 17:03:09 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Martel",
"Karl",
""
]
] | Coalescing compact binaries have been pointed out as the most promising source of gravitational waves for kilometer-size interferometers such as LIGO. Gravitational wave signals are extracted from the noise in the detectors by matched filtering. This technique performs really well if an a priori theoretical knowledge o... |
1402.5585 | David Maxwell | David Maxwell | The Conformal Method and the Conformal Thin-Sandwich Method Are the Same | 34 pages; minor misprints corrected, and a reference added | null | 10.1088/0264-9381/31/14/145006 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The conformal method developed in the 1970s and the more recent Lagrangian
and Hamiltonian conformal thin-sandwich methods are techniques for finding
solutions of the Einstein constraint equations. We show that they are
manifestations of a single conformal method: there is a straightforward way to
convert back and fo... | [
{
"created": "Sun, 23 Feb 2014 07:35:48 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Jun 2014 22:01:58 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Maxwell",
"David",
""
]
] | The conformal method developed in the 1970s and the more recent Lagrangian and Hamiltonian conformal thin-sandwich methods are techniques for finding solutions of the Einstein constraint equations. We show that they are manifestations of a single conformal method: there is a straightforward way to convert back and fort... |
2109.05757 | Houri Ziaeepour | Houri Ziaeepour | Comparing Quantum Gravity Models: String Theory, Loop Quantum Gravity,
and Entanglement gravity versus $SU(\infty)$-QGR | 39 pages, no figure | Symmetry, 14 (2022) 58 | 10.3390/sym14010058 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous work [arXiv:2009.03428] we proposed a new model for Quantum
GRavity(QGR) and cosmology, dubbed $SU(\infty)$-QGR. One of the axioms of this
model is that Hilbert spaces of the Universe and its subsystems represent
$SU(\infty)$ symmetry group. In this framework, the classical spacetime is
interpreted as b... | [
{
"created": "Mon, 13 Sep 2021 07:49:42 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Nov 2021 05:16:17 GMT",
"version": "v2"
}
] | 2022-01-04 | [
[
"Ziaeepour",
"Houri",
""
]
] | In a previous work [arXiv:2009.03428] we proposed a new model for Quantum GRavity(QGR) and cosmology, dubbed $SU(\infty)$-QGR. One of the axioms of this model is that Hilbert spaces of the Universe and its subsystems represent $SU(\infty)$ symmetry group. In this framework, the classical spacetime is interpreted as bei... |
1807.10704 | Herbert Hamber | Herbert W. Hamber, Lu Heng Sunny Yu | Gravitational Fluctuations as an Alternative to Inflation | 33 pages, 6 figures. One figure added following the July 2018 release
of new Planck data. Typos fixed, more references added. Paper now conforms to
the published version | Universe 2019, 5, 31 | 10.3390/universe5010031 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ability to reproduce the observed matter power spectrum $P(k)$ to high
accuracy is often considered as a triumph of inflation. In this work, we
explore an alternative explanation for the power spectrum based on
nonperturbative quantum field-theoretical methods applied to Einstein's
gravity, instead of ones based ... | [
{
"created": "Fri, 27 Jul 2018 16:05:09 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jan 2019 18:49:04 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Mar 2019 19:28:00 GMT",
"version": "v3"
}
] | 2019-03-18 | [
[
"Hamber",
"Herbert W.",
""
],
[
"Yu",
"Lu Heng Sunny",
""
]
] | The ability to reproduce the observed matter power spectrum $P(k)$ to high accuracy is often considered as a triumph of inflation. In this work, we explore an alternative explanation for the power spectrum based on nonperturbative quantum field-theoretical methods applied to Einstein's gravity, instead of ones based on... |
1510.07015 | Sk Hossein Dr. | Mehedi Kalam, Sk. Monowar Hossein and Sajahan Molla | Neutron Stars : A Comparative Study | 7 pages, 11 figures and 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inner structure of neutron star is considered from theoretical point of
view and is compared with the observed data. We have proposed a form of an
equation of state relating pressure with matter density which indicates the
stiff equation of state of neutron stars. From our study we have calculated
mass(M), compac... | [
{
"created": "Fri, 23 Oct 2015 18:58:28 GMT",
"version": "v1"
}
] | 2015-10-26 | [
[
"Kalam",
"Mehedi",
""
],
[
"Hossein",
"Sk. Monowar",
""
],
[
"Molla",
"Sajahan",
""
]
] | The inner structure of neutron star is considered from theoretical point of view and is compared with the observed data. We have proposed a form of an equation of state relating pressure with matter density which indicates the stiff equation of state of neutron stars. From our study we have calculated mass(M), compactn... |
1511.08823 | Yaser Tavakoli | Saeed Rastgoo, Yaser Tavakoli and Julio C. Fabris | Phenomenology of a massive quantum field in a cosmological quantum
spacetime | Major revision (This version: 34 pages); to appear in J. Annals of
Phys | Annals of Physics 415 (2020) 168110 | 10.1016/j.aop.2020.168110 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the quantum theory of a massive, minimally coupled scalar field,
propagating on the Planck-era isotropic cosmological quantum spacetime which
transitions to a classical spacetime in later times. The quantum effects modify
the isotropic spacetime such that effectively it exhibits anisotropies. Thus,
the int... | [
{
"created": "Fri, 27 Nov 2015 21:31:10 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Oct 2019 18:29:23 GMT",
"version": "v2"
},
{
"created": "Sat, 29 Feb 2020 21:52:04 GMT",
"version": "v3"
}
] | 2020-03-06 | [
[
"Rastgoo",
"Saeed",
""
],
[
"Tavakoli",
"Yaser",
""
],
[
"Fabris",
"Julio C.",
""
]
] | We revisit the quantum theory of a massive, minimally coupled scalar field, propagating on the Planck-era isotropic cosmological quantum spacetime which transitions to a classical spacetime in later times. The quantum effects modify the isotropic spacetime such that effectively it exhibits anisotropies. Thus, the inter... |
gr-qc/9508041 | Emili Elizalde | E. Elizalde and S.D. Odintsov | A renormalization group improved non-local gravitational effective
Lagrangian | LaTeX file, 11 pages, no figures | Mod.Phys.Lett.A10:1821-1828,1995 | 10.1142/S0217732395001952 | CEAB 95/8-3 | gr-qc | null | Renormalization group techniques are used in order to obtain the improved
non-local gravitational effective action corresponding to any asymptotically
free GUT, up to invariants which are quadratic on the curvature. The
corresponding non-local gravitational equations are written down, both for the
case of asymptotica... | [
{
"created": "Fri, 18 Aug 1995 07:43:35 GMT",
"version": "v1"
}
] | 2009-09-17 | [
[
"Elizalde",
"E.",
""
],
[
"Odintsov",
"S. D.",
""
]
] | Renormalization group techniques are used in order to obtain the improved non-local gravitational effective action corresponding to any asymptotically free GUT, up to invariants which are quadratic on the curvature. The corresponding non-local gravitational equations are written down, both for the case of asymptoticall... |
1706.06700 | Florian Beyer | Florian Beyer, Leon Escobar, J\"org Frauendiener | Asymptotics of solutions of a hyperbolic formulation of the constraint
equations | 26 pages, 10 figures | Class. Quantum Grav. 34 (2017) 205014 (25pp) | 10.1088/1361-6382/aa8be6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the hyperbolic formulation of the constraints
introduced by R\'acz. Using the numerical framework recently developed by us we
construct initial data sets which can be interpreted as nonlinear perturbations
of Schwarzschild data in Kerr-Schild coordinates and investigate their
asymptotics. Ou... | [
{
"created": "Tue, 20 Jun 2017 23:13:58 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Sep 2017 22:56:43 GMT",
"version": "v2"
}
] | 2017-10-02 | [
[
"Beyer",
"Florian",
""
],
[
"Escobar",
"Leon",
""
],
[
"Frauendiener",
"Jörg",
""
]
] | In this paper we consider the hyperbolic formulation of the constraints introduced by R\'acz. Using the numerical framework recently developed by us we construct initial data sets which can be interpreted as nonlinear perturbations of Schwarzschild data in Kerr-Schild coordinates and investigate their asymptotics. Our ... |
2407.10263 | Justin Janquart | Wouter van Straalen, Alex Kolmus, Justin Janquart, Chris Van Den
Broeck | Pre-Merger Detection and Characterization of Inspiraling Binary Neutron
Stars Derived from Neural Posterior Estimation | 16 pages, 11 figues | null | null | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As the sensitivity of the international gravitational wave detector network
increases, observing binary neutron star signals will become more common.
Moreover, since these signals will be louder, the chances of detecting them
before their mergers increase. However, this requires an efficient framework.
In this work, ... | [
{
"created": "Sun, 14 Jul 2024 16:08:19 GMT",
"version": "v1"
}
] | 2024-07-16 | [
[
"van Straalen",
"Wouter",
""
],
[
"Kolmus",
"Alex",
""
],
[
"Janquart",
"Justin",
""
],
[
"Broeck",
"Chris Van Den",
""
]
] | As the sensitivity of the international gravitational wave detector network increases, observing binary neutron star signals will become more common. Moreover, since these signals will be louder, the chances of detecting them before their mergers increase. However, this requires an efficient framework. In this work, we... |
gr-qc/9904010 | John T. Whelan | John T. Whelan | Quasi-Stationary Binary Inspiral: Project Overview | 9 pages, LaTex with texas.sty style file (included), 3 figures
included via epsfig, submitted to the Proceedings of the 19th Texas Symposium
(Paris, December 1998) | null | null | null | gr-qc | null | I describe the current status of a collaboration with J.D. Romano, R.H.
Price, and W. Krivan to model the geometry of and gravitational radiation
emitted by a binary system of compact objects in the regime where
non-perturbative gravitational effects exist, but the rate of inspiral is still
small relative to the orbi... | [
{
"created": "Mon, 5 Apr 1999 20:59:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Whelan",
"John T.",
""
]
] | I describe the current status of a collaboration with J.D. Romano, R.H. Price, and W. Krivan to model the geometry of and gravitational radiation emitted by a binary system of compact objects in the regime where non-perturbative gravitational effects exist, but the rate of inspiral is still small relative to the orbita... |
2105.04303 | Edoardo D'Angelo | Edoardo D'Angelo | Entropy for spherically symmetric, dynamical black holes from the
relative entropy between coherent states of a scalar quantum field | null | null | 10.1088/1361-6382/ac13b8 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The goal of this paper is to prove an area law for the entropy of dynamical,
spherically symmetric black holes from the relative entropy between coherent
states of the quantum matter, generalising the results by Hollands and
Ishibashi on the relative entropy on a Schwarzschild background. We consider
the relative ent... | [
{
"created": "Mon, 10 May 2021 12:27:12 GMT",
"version": "v1"
}
] | 2021-09-01 | [
[
"D'Angelo",
"Edoardo",
""
]
] | The goal of this paper is to prove an area law for the entropy of dynamical, spherically symmetric black holes from the relative entropy between coherent states of the quantum matter, generalising the results by Hollands and Ishibashi on the relative entropy on a Schwarzschild background. We consider the relative entro... |
2207.05245 | Chan Park | Chan Park | Observation of Gravitational Waves by Invariants for Electromagnetic
Waves | null | 2022 ApJ 940 58 | 10.3847/1538-4357/ac9bff | CTPU-PTC-22-17 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We lay a theoretical foundation in the observation of gravitational waves
(GWs) by electromagnetic waves (EMWs) performing a full electromagnetic
analysis without any optical approximation. For that, the perturbation of plane
EMWs is obtained by solving the perturbed Maxwell equation with GWs in the
Minkowski backgro... | [
{
"created": "Tue, 12 Jul 2022 00:57:19 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2022 12:09:56 GMT",
"version": "v2"
}
] | 2022-11-22 | [
[
"Park",
"Chan",
""
]
] | We lay a theoretical foundation in the observation of gravitational waves (GWs) by electromagnetic waves (EMWs) performing a full electromagnetic analysis without any optical approximation. For that, the perturbation of plane EMWs is obtained by solving the perturbed Maxwell equation with GWs in the Minkowski backgroun... |
1210.6904 | Robert McNees | Daniel Grumiller, Robert McNees, Simone Zonetti | Black holes in the conical ensemble | 51 pages, 7 figures | Phys.Rev. D86 (2012) 124043 | 10.1103/PhysRevD.86.124043 | TUW-12-30 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider black holes in an "unsuitable box": a finite cavity coupled to a
thermal reservoir at a temperature different than the black hole's Hawking
temperature. These black holes are described by metrics that are continuous but
not differentiable due to a conical singularity at the horizon. We include them
in the... | [
{
"created": "Thu, 25 Oct 2012 16:50:03 GMT",
"version": "v1"
}
] | 2013-06-18 | [
[
"Grumiller",
"Daniel",
""
],
[
"McNees",
"Robert",
""
],
[
"Zonetti",
"Simone",
""
]
] | We consider black holes in an "unsuitable box": a finite cavity coupled to a thermal reservoir at a temperature different than the black hole's Hawking temperature. These black holes are described by metrics that are continuous but not differentiable due to a conical singularity at the horizon. We include them in the E... |
1808.04137 | Nur Jaman | Radouane Gannouji, Md. Wali Hossain, Nur Jaman and M. Sami | Bigravity and Horndeski gravity connected by a disformal coupling | 10 pages, 5 figures, Analysis extended to capture generalization,
Revised version to appear in PRD | Phys. Rev. D 99, 043504 (2019) | 10.1103/PhysRevD.99.043504 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have studied bi-gravity theory in a very specific limit
where we focused only on one degree of freedom generated by the massive
graviton. We have analyzed the model in the context of cosmology and
demonstrated that the model can give rise to late time cosmic acceleration as
an attractor of the dynam... | [
{
"created": "Mon, 13 Aug 2018 10:24:03 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jan 2019 18:58:24 GMT",
"version": "v2"
}
] | 2020-07-14 | [
[
"Gannouji",
"Radouane",
""
],
[
"Hossain",
"Md. Wali",
""
],
[
"Jaman",
"Nur",
""
],
[
"Sami",
"M.",
""
]
] | In this paper, we have studied bi-gravity theory in a very specific limit where we focused only on one degree of freedom generated by the massive graviton. We have analyzed the model in the context of cosmology and demonstrated that the model can give rise to late time cosmic acceleration as an attractor of the dynamic... |
2307.02400 | Elena P. Savelova Dr. | A.A. Kirillov and E.P. Savelova | Possible scenario of relic wormhole formation | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | It is shown that in the presence of virtual wormholes, the vacuum is
unstable, which leads to a series of phase transitions in the early Universe.
Then the standard Kibble scenario predicts the formation of defects such as
domain walls. An unusual feature of virtual wormholes is that they generate
defects with negati... | [
{
"created": "Wed, 5 Jul 2023 16:20:40 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Feb 2024 18:30:13 GMT",
"version": "v2"
}
] | 2024-02-02 | [
[
"Kirillov",
"A. A.",
""
],
[
"Savelova",
"E. P.",
""
]
] | It is shown that in the presence of virtual wormholes, the vacuum is unstable, which leads to a series of phase transitions in the early Universe. Then the standard Kibble scenario predicts the formation of defects such as domain walls. An unusual feature of virtual wormholes is that they generate defects with negative... |
1207.2663 | Diego S\'aez-G\'omez | A. de la Cruz-Dombriz (ACGC and University Cape Town) and D.
Saez-Gomez (Basque Country University, EHU/UPV) | Black holes, cosmological solutions, future singularities, and their
thermodynamical properties in modified gravity theories | 37 pages. arXiv admin note: substantial text overlap with
arXiv:1002.1942, arXiv:1109.4519, arXiv:0907.3872. Version published in
Entropy Journal | Entropy 2012, 14, 1717-1770 | 10.3390/e14091717 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Along this review, we focus on the study of several properties of modified
gravity theories, in particular on black-hole solutions and its comparison with
those solutions in General Relativity, and on
Friedmann-Lemaitre-Robertson-Walker metrics. The thermodynamical properties of
fourth order gravity theories are also... | [
{
"created": "Wed, 11 Jul 2012 14:56:15 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Sep 2012 18:53:49 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"de la Cruz-Dombriz",
"A.",
"",
"ACGC and University Cape Town"
],
[
"Saez-Gomez",
"D.",
"",
"Basque Country University, EHU/UPV"
]
] | Along this review, we focus on the study of several properties of modified gravity theories, in particular on black-hole solutions and its comparison with those solutions in General Relativity, and on Friedmann-Lemaitre-Robertson-Walker metrics. The thermodynamical properties of fourth order gravity theories are also a... |
2306.15198 | Masato Nozawa | Masato Nozawa and Takashi Torii | Wormhole $C$ metric | 17 pages, 5 figures; v2 references added, accepted version in PRD | Phys. Rev. D 108, 064036 (2023) | 10.1103/PhysRevD.108.064036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The C-metric in vacuum general relativity describes a pair of accelerated
black holes supported by conical singularity. In this paper, we present a new
family of exact solutions to the Einstein-phantom scalar system that describes
accelerated wormholes in AdS. In the zero acceleration limit with a vanishing
potential... | [
{
"created": "Tue, 27 Jun 2023 04:42:46 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2023 01:34:56 GMT",
"version": "v2"
}
] | 2023-09-20 | [
[
"Nozawa",
"Masato",
""
],
[
"Torii",
"Takashi",
""
]
] | The C-metric in vacuum general relativity describes a pair of accelerated black holes supported by conical singularity. In this paper, we present a new family of exact solutions to the Einstein-phantom scalar system that describes accelerated wormholes in AdS. In the zero acceleration limit with a vanishing potential, ... |
1006.0232 | Leonardo Modesto | Francesco Caravelli, Leonardo Modesto | Spinning Loop Black Holes | 18 pages, 18 figures | Class.Quant.Grav.27:245022,2010 | 10.1088/0264-9381/27/24/245022 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct four Kerr-like spacetimes starting from the loop
black hole Schwarzschild solutions (LBH) and applying the Newman-Janis
transformation. In previous papers the Schwarzschild LBH was obtained replacing
the Ashtekar connection with holonomies on a particular graph in a
minisuperspace approxima... | [
{
"created": "Tue, 1 Jun 2010 20:00:32 GMT",
"version": "v1"
}
] | 2010-12-06 | [
[
"Caravelli",
"Francesco",
""
],
[
"Modesto",
"Leonardo",
""
]
] | In this paper we construct four Kerr-like spacetimes starting from the loop black hole Schwarzschild solutions (LBH) and applying the Newman-Janis transformation. In previous papers the Schwarzschild LBH was obtained replacing the Ashtekar connection with holonomies on a particular graph in a minisuperspace approximati... |
gr-qc/0512045 | Antonio J. Segui | P. Diaz, M.A. Per and A.Segui | The initial conditions of the Universe and holography | Talk presented at the XXVIII Spanish Relativity Meeting E.R.E. 2005,
Oviedo, September 6-10, 2005, to be published by AIP Conference Proceedings,
4 pages | null | 10.1063/1.2218248 | null | gr-qc astro-ph hep-th | null | We address the initial conditions for an expanding cosmology using the
holographic principle. For the case of a closed model, the old prescription of
Fishler and Susskind, that uses the particle horizon to encode the bulk degrees
of freedom, can be implemented for accelerated models with enough acceleration.
As a bon... | [
{
"created": "Wed, 7 Dec 2005 10:44:30 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Diaz",
"P.",
""
],
[
"Per",
"M. A.",
""
],
[
"Segui",
"A.",
""
]
] | We address the initial conditions for an expanding cosmology using the holographic principle. For the case of a closed model, the old prescription of Fishler and Susskind, that uses the particle horizon to encode the bulk degrees of freedom, can be implemented for accelerated models with enough acceleration. As a bonus... |
2209.04262 | Mikhail Khlopunov | M. Khlopunov, D. V. Gal'tsov | Leakage of gravitational waves into an extra dimension in the DGP model | 37 pages, 4 figures | null | 10.1088/1475-7516/2022/10/062 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the DGP model, the graviton is unstable, which leads to a modification of
gravity at cosmological distances. In particular, this leads to the leakage of
gravitational waves from the brane into an extra dimension at large distances
from the source. However, the calculation of the gravitational wave leakage
intensit... | [
{
"created": "Fri, 9 Sep 2022 11:51:40 GMT",
"version": "v1"
}
] | 2022-10-26 | [
[
"Khlopunov",
"M.",
""
],
[
"Gal'tsov",
"D. V.",
""
]
] | In the DGP model, the graviton is unstable, which leads to a modification of gravity at cosmological distances. In particular, this leads to the leakage of gravitational waves from the brane into an extra dimension at large distances from the source. However, the calculation of the gravitational wave leakage intensity ... |
gr-qc/0406037 | Vishnu Jejjala | Vishnu Jejjala, Djordje Minic, Chia-Hsiung Tze | Toward a Background Independent Quantum Theory of Gravity | Awarded Honorable Mention, 2004 Gravity Research Foundation Essay
Competition; 8 pages, LaTeX | Int.J.Mod.Phys.D13:2307-2314,2004 | 10.1142/S0218271804006371 | VPI-IPPAP-04-05 | gr-qc hep-th | null | Any canonical quantum theory can be understood to arise from the
compatibility of the statistical geometry of distinguishable observations with
the canonical Poisson structure of Hamiltonian dynamics. This geometric
perspective offers a novel, background independent non-perturbative formulation
of quantum gravity. We... | [
{
"created": "Wed, 9 Jun 2004 17:50:10 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Jejjala",
"Vishnu",
""
],
[
"Minic",
"Djordje",
""
],
[
"Tze",
"Chia-Hsiung",
""
]
] | Any canonical quantum theory can be understood to arise from the compatibility of the statistical geometry of distinguishable observations with the canonical Poisson structure of Hamiltonian dynamics. This geometric perspective offers a novel, background independent non-perturbative formulation of quantum gravity. We i... |
1606.08913 | Dao-Jun Liu | Yang Huang and Dao-Jun Liu | Scalar clouds and the superradiant instability regime of Kerr-Newman
black hole | 5 pages, 2 figures, comments welcome | Phys. Rev. D 94, 064030 (2016) | 10.1103/PhysRevD.94.064030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study a physical system that is composed of massive charged
scalar field linearly coupled to a charged rotating Kerr-Newman black hole.
Given the parameters of black hole and a specific set of "quantum" numbers, the
parameter space of the scalar field, which is a plane spanned by its mass and
charge... | [
{
"created": "Tue, 28 Jun 2016 23:30:09 GMT",
"version": "v1"
}
] | 2016-09-21 | [
[
"Huang",
"Yang",
""
],
[
"Liu",
"Dao-Jun",
""
]
] | In this paper, we study a physical system that is composed of massive charged scalar field linearly coupled to a charged rotating Kerr-Newman black hole. Given the parameters of black hole and a specific set of "quantum" numbers, the parameter space of the scalar field, which is a plane spanned by its mass and charge, ... |
gr-qc/0403087 | Kostas Kokkotas D. | Nils Andersson and Kostas D Kokkotas | Gravitational-wave astronomy: the high-frequency window | 21 pages, 5 figures, Lectures presented at the 2nd Aegean Summer
School on the Early Universe, Syros, Greece, September 2003 | Lect.Notes Phys.653:255-276,2004 | 10.1007/978-3-540-31535-3_8 | null | gr-qc | null | This contribution is divided in two parts. The first part provides a
text-book level introduction to gravitational radiation. The key concepts
required for a discussion of gravitational-wave physics are introduced. In
particular, the quadrupole formula is applied to the anticipated
``bread-and-butter'' source for det... | [
{
"created": "Sat, 20 Mar 2004 17:33:59 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Andersson",
"Nils",
""
],
[
"Kokkotas",
"Kostas D",
""
]
] | This contribution is divided in two parts. The first part provides a text-book level introduction to gravitational radiation. The key concepts required for a discussion of gravitational-wave physics are introduced. In particular, the quadrupole formula is applied to the anticipated ``bread-and-butter'' source for detec... |
gr-qc/0212015 | Robert Steven Millward | R. Steven Millward and Eric W. Hirschmann | Critical behavior of gravitating sphalerons | Latex, 14 pages, 8 figures | Phys.Rev. D68 (2003) 024017 | 10.1103/PhysRevD.68.024017 | null | gr-qc | null | We examine the gravitational collapse of sphaleron type configurations in
Einstein--Yang--Mills--Higgs theory. Working in spherical symmetry, we
investigate the critical behavior in this model. We provide evidence that for
various initial configurations, there can be three different critical
transitions between possi... | [
{
"created": "Tue, 3 Dec 2002 17:31:28 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Millward",
"R. Steven",
""
],
[
"Hirschmann",
"Eric W.",
""
]
] | We examine the gravitational collapse of sphaleron type configurations in Einstein--Yang--Mills--Higgs theory. Working in spherical symmetry, we investigate the critical behavior in this model. We provide evidence that for various initial configurations, there can be three different critical transitions between possibl... |
gr-qc/0311048 | Yuri Pavlov | A. A. Grib | Nonzero cosmological constant and the many vacua world | LaTeX, 7 pages, no figures | null | null | null | gr-qc | null | The idea of the quantum state of the Universe described by some density
matrix, i.e mixture of at least two vacua, the trivial symmetric and the
nontrivial one with spontaneously broken symmetry is discussed. Nonzero
cosmological constant necessarily arises for such a state and has the
observable value if one takes t... | [
{
"created": "Fri, 14 Nov 2003 14:24:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grib",
"A. A.",
""
]
] | The idea of the quantum state of the Universe described by some density matrix, i.e mixture of at least two vacua, the trivial symmetric and the nontrivial one with spontaneously broken symmetry is discussed. Nonzero cosmological constant necessarily arises for such a state and has the observable value if one takes the... |
0901.3860 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Oleg B. Zaslavskii | The angular momentum and mass formulas for rotating stationary
quasi-black holes | 14 pages | Phys.Rev.D79:044020,2009 | 10.1103/PhysRevD.79.044020 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the quasi-black hole limit of a stationary body when its boundary
approaches its own gravitational radius, i.e., its quasi-horizon. It is shown
that there exists a perfect correspondence between the different mass
contributions and the mass formula for quasi-black and black holes in spite of
difference in... | [
{
"created": "Sat, 24 Jan 2009 22:27:16 GMT",
"version": "v1"
}
] | 2009-09-02 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zaslavskii",
"Oleg B.",
""
]
] | We consider the quasi-black hole limit of a stationary body when its boundary approaches its own gravitational radius, i.e., its quasi-horizon. It is shown that there exists a perfect correspondence between the different mass contributions and the mass formula for quasi-black and black holes in spite of difference in d... |
gr-qc/0503100 | David R. Fiske | David R. Fiske, John G. Baker, James R. van Meter, Dae-Il Choi, Joan
M. Centrella | Wave zone extraction of gravitational radiation in three-dimensional
numerical relativity | 11 pages, 5 figures. In version two we have included more references
to existing literature. The main content of the manuscript remains unchanged | Phys.Rev. D71 (2005) 104036 | 10.1103/PhysRevD.71.104036 | null | gr-qc | null | We present convergent gravitational waveforms extracted from
three-dimensional, numerical simulations in the wave zone and with causally
disconnected boundaries. These waveforms last for multiple periods and are very
accurate, showing a peak error to peak amplitude ratio of 2% or better. Our
approach includes definin... | [
{
"created": "Wed, 23 Mar 2005 19:38:39 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Mar 2005 23:03:38 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Fiske",
"David R.",
""
],
[
"Baker",
"John G.",
""
],
[
"van Meter",
"James R.",
""
],
[
"Choi",
"Dae-Il",
""
],
[
"Centrella",
"Joan M.",
""
]
] | We present convergent gravitational waveforms extracted from three-dimensional, numerical simulations in the wave zone and with causally disconnected boundaries. These waveforms last for multiple periods and are very accurate, showing a peak error to peak amplitude ratio of 2% or better. Our approach includes defining ... |
2211.02997 | Alexander Zhidenko | R. A. Konoplya, A. Zhidenko | Bernstein spectral method for quasinormal modes of a generic black hole
spacetime and application to instability of dilaton-de Sitter solution | 9 pages, 2 figures, 2 ancillary files | Phys. Rev. D 107, 044009 (2023) | 10.1103/PhysRevD.107.044009 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the improved Mathematica code which computes quasinormal
frequencies with the help of the Bernstein spectral method for a general class
of black holes, allowing for asymptotically flat, de Sitter or anti-de Sitter
asymptotic. The method is especially efficient when searching for purely
imaginary and unstab... | [
{
"created": "Sun, 6 Nov 2022 00:55:37 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Nov 2022 21:13:32 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Feb 2023 17:29:59 GMT",
"version": "v3"
}
] | 2023-02-07 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | We present the improved Mathematica code which computes quasinormal frequencies with the help of the Bernstein spectral method for a general class of black holes, allowing for asymptotically flat, de Sitter or anti-de Sitter asymptotic. The method is especially efficient when searching for purely imaginary and unstable... |
1102.1148 | Johan Noldus | Johan Noldus | Should quantum theory change in the light of gravity? | Pedagogical paper I wrote one year ago | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study implications of the geometrical nature of space- time
for some of the basic tenets of quantum mechanics. That is, we study two
different implications of the principle of general covariance; first we
quantize a reparametrization invariant theory, the free particle in Minkowski
spacetime and poi... | [
{
"created": "Sun, 6 Feb 2011 13:20:37 GMT",
"version": "v1"
},
{
"created": "Wed, 15 May 2013 14:17:57 GMT",
"version": "v2"
}
] | 2013-05-16 | [
[
"Noldus",
"Johan",
""
]
] | In this paper, we study implications of the geometrical nature of space- time for some of the basic tenets of quantum mechanics. That is, we study two different implications of the principle of general covariance; first we quantize a reparametrization invariant theory, the free particle in Minkowski spacetime and point... |
1207.5448 | Piotr Jaranowski | Piotr Jaranowski and Gerhard Sch\"afer | Towards the 4th post-Newtonian Hamiltonian for two-point-mass systems | ReVTeX 4-1, 4 pages | null | 10.1103/PhysRevD.86.061503 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The article presents the conservative dynamics of gravitationally interacting
two-point-mass systems up to the eight order in the inverse power of the
velocity of light, i.e.\ 4th post-Newtonian (4PN) order, and up to quadratic
order in Newton's gravitational constant. Additionally, all logarithmic terms
at the 4PN o... | [
{
"created": "Mon, 23 Jul 2012 16:44:50 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Jaranowski",
"Piotr",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | The article presents the conservative dynamics of gravitationally interacting two-point-mass systems up to the eight order in the inverse power of the velocity of light, i.e.\ 4th post-Newtonian (4PN) order, and up to quadratic order in Newton's gravitational constant. Additionally, all logarithmic terms at the 4PN ord... |
1001.4041 | Petros Wallden Dr | Petros Wallden | Causal Sets: Quantum gravity from a fundamentally discrete spacetime | 10 pages, review of causal sets based on talk given at the 1st MCCQG
conference | J. Phys.: Conf. Ser. 222, 012053 (2010) | 10.1088/1742-6596/222/1/012053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to construct a quantum theory of gravity, we may have to abandon
certain assumptions we were making. In particular, the concept of spacetime as
a continuum substratum is questioned. Causal Sets is an attempt to construct a
quantum theory of gravity starting with a fundamentally discrete spacetime. In
this co... | [
{
"created": "Fri, 22 Jan 2010 16:58:26 GMT",
"version": "v1"
}
] | 2010-06-02 | [
[
"Wallden",
"Petros",
""
]
] | In order to construct a quantum theory of gravity, we may have to abandon certain assumptions we were making. In particular, the concept of spacetime as a continuum substratum is questioned. Causal Sets is an attempt to construct a quantum theory of gravity starting with a fundamentally discrete spacetime. In this cont... |
1012.4605 | Diego S\'aez-G\'omez | Diego S\'aez-G\'omez | Cosmological solutions in F(R) Horava-Lifshitz gravity | 4 pages. Contribution to the Proceedings of the Spanish Relativity
Meeting (ERE) 2010, Granada, Spain | null | 10.1088/1742-6596/314/1/012055 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | At the present work, it is studied the extension of F (R) gravities to the
new recently proposed theory of gravity, the so-called Horava-Lifshitz gravity,
which provides a way to make the theory power counting renormalizable by
breaking Lorentz invariance. It is showed that dark energy can be well
explained in the fr... | [
{
"created": "Tue, 21 Dec 2010 11:00:31 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Sáez-Gómez",
"Diego",
""
]
] | At the present work, it is studied the extension of F (R) gravities to the new recently proposed theory of gravity, the so-called Horava-Lifshitz gravity, which provides a way to make the theory power counting renormalizable by breaking Lorentz invariance. It is showed that dark energy can be well explained in the fram... |
2011.04399 | Orhan Donmez | Orhan Donmez | Bondi-Hoyle Accretion around the Non-rotating Black Hole in 4D
Einstein-Gauss-Bonnet Gravity | 9 pages, 10 figures, Resubmitted to EPJC after referee report | null | 10.1140/epjc/s10052-021-08923-1 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the numerical investigation of a Bondi-Hoyle accretion around
a non-rotating black hole in a novel four dimensional Einstein-Gauss-Bonnet
gravity is investigated by solving the general relativistic hydrodynamical
equations using the high resolution shock capturing scheme. For this purpose,
the accreate... | [
{
"created": "Mon, 9 Nov 2020 13:03:53 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jan 2021 18:37:05 GMT",
"version": "v2"
}
] | 2021-02-24 | [
[
"Donmez",
"Orhan",
""
]
] | In this paper, the numerical investigation of a Bondi-Hoyle accretion around a non-rotating black hole in a novel four dimensional Einstein-Gauss-Bonnet gravity is investigated by solving the general relativistic hydrodynamical equations using the high resolution shock capturing scheme. For this purpose, the accreated ... |
gr-qc/9607059 | Jai-chan Hwang | J. Hwang | Quantum fluctuations of Cosmological Perturbations in Generalized
Gravity | 5 pages, revtex, no figures | Class.Quant.Grav.14:3327-3336,1997 | 10.1088/0264-9381/14/12/016 | null | gr-qc hep-th | null | Recently, we presented a unified way of analysing classical cosmological
perturbation in generalized gravity theories. In this paper, we derive the
perturbation spectrums generated from quantum fluctuations again in unified
forms. We consider a situation where an accelerated expansion phase of the
early universe is r... | [
{
"created": "Wed, 24 Jul 1996 06:37:00 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Hwang",
"J.",
""
]
] | Recently, we presented a unified way of analysing classical cosmological perturbation in generalized gravity theories. In this paper, we derive the perturbation spectrums generated from quantum fluctuations again in unified forms. We consider a situation where an accelerated expansion phase of the early universe is rea... |
2311.12186 | Slimane Zaim | Abdellah Touati and Slimane Zaim | Schwarzschild black hole surrounded by a cavity and phase transition in
the non-commutative gauge theory of gravity | 9 pages, 5 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work, we investigate the phase transition of the Schwarzschild black
hole (SBH) inside an isothermal spherical cavity in the context of the
non-commutative (NC) gauge theory of gravity, by using the Seiberg-Witten (SW)
map and the star product. Firstly, we compute the NC correction to the Hawking
temperature ... | [
{
"created": "Mon, 20 Nov 2023 21:04:10 GMT",
"version": "v1"
}
] | 2023-11-22 | [
[
"Touati",
"Abdellah",
""
],
[
"Zaim",
"Slimane",
""
]
] | In this work, we investigate the phase transition of the Schwarzschild black hole (SBH) inside an isothermal spherical cavity in the context of the non-commutative (NC) gauge theory of gravity, by using the Seiberg-Witten (SW) map and the star product. Firstly, we compute the NC correction to the Hawking temperature an... |
1509.02923 | Helgi Freyr R\'unarsson | Carlos A. R. Herdeiro and Eugen Radu and Helgi R\'unarsson | Kerr black holes with self-interacting scalar hair: hairier but not
heavier | null | Phys. Rev. D 92, 084059 (2015) | 10.1103/PhysRevD.92.084059 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The maximal ADM mass for (mini-)boson stars (BSs) -- gravitating solitons of
Einstein's gravity minimally coupled to a free, complex, mass $\mu$,
Klein-Gordon field -- is $M_{\rm ADM}^{\rm max}\sim M_{Pl}^2/\mu$. Adding
quartic self-interactions to the scalar field theory, described by the
Lagrangian $\mathcal{L}_I=\... | [
{
"created": "Wed, 9 Sep 2015 20:14:40 GMT",
"version": "v1"
}
] | 2015-11-04 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
],
[
"Rúnarsson",
"Helgi",
""
]
] | The maximal ADM mass for (mini-)boson stars (BSs) -- gravitating solitons of Einstein's gravity minimally coupled to a free, complex, mass $\mu$, Klein-Gordon field -- is $M_{\rm ADM}^{\rm max}\sim M_{Pl}^2/\mu$. Adding quartic self-interactions to the scalar field theory, described by the Lagrangian $\mathcal{L}_I=\la... |
2111.04966 | Tao Zhu | Chao Zhang, Tao Zhu, and Anzhong Wang | Gravitational axial perturbations of Schwarzschild-like black holes in
dark matter halos | 10 pages, 4 figures, 4 tables; v2: references added and some
discussions about halo parameters expanded; v3: match the published version
in PRD | null | 10.1103/PhysRevD.104.124082 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Gravitational waves emitted by distorted black holes, such as those arising
from the coalescence of binary black holes, or a falling compact star into a
supermassive black hole, carry not only information about the corresponding
spacetime but also information about the environment surrounding the black
holes. In this... | [
{
"created": "Tue, 9 Nov 2021 06:44:03 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Dec 2021 05:59:08 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Feb 2022 05:20:23 GMT",
"version": "v3"
}
] | 2022-02-10 | [
[
"Zhang",
"Chao",
""
],
[
"Zhu",
"Tao",
""
],
[
"Wang",
"Anzhong",
""
]
] | Gravitational waves emitted by distorted black holes, such as those arising from the coalescence of binary black holes, or a falling compact star into a supermassive black hole, carry not only information about the corresponding spacetime but also information about the environment surrounding the black holes. In this p... |
gr-qc/9411042 | Redouane Fakir | Redouane Fakir | The Interstellar Medium as a Gravity Wave Detector | 13 pages, latex, no figures | Int.J.Mod.Phys.D6:49-56,1997 | 10.1142/S0218271897000042 | UBCTP-94-011 | gr-qc astro-ph | null | An observer, situated several thousand light-years away from a radio pulsar,
finds himself embedded in the diffraction pattern resulting from the
propagation of the radio waves through the irregular interstellar medium. The
observer's movement relative to the pattern causes an apparent scintillation of
the pulsar. A ... | [
{
"created": "Wed, 16 Nov 1994 12:55:16 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 1995 18:20:50 GMT",
"version": "v2"
}
] | 2010-11-01 | [
[
"Fakir",
"Redouane",
""
]
] | An observer, situated several thousand light-years away from a radio pulsar, finds himself embedded in the diffraction pattern resulting from the propagation of the radio waves through the irregular interstellar medium. The observer's movement relative to the pattern causes an apparent scintillation of the pulsar. A bi... |
1905.00001 | Jakub Bilski | Jakub Bilski and Antonino Marciano | Critical Insight into the Cosmological Sector of Loop Quantum Gravity | 25 pages, significantly improved version of the manuscript, accepted
for publication in Physical Review D. arXiv admin note: text overlap with
arXiv:1707.00065 | Phys. Rev. D 101, 066026 (2020) | 10.1103/PhysRevD.101.066026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article sheds new light on the problem of cosmological reduction in Loop
Quantum Gravity. We critically analyze Quantum Reduced Loop Gravity -- an
attempt to extract the cosmological sector of the full theory. We reconsider
the reduction procedure applied to the states of the kinematical Hilbert space,
developin... | [
{
"created": "Mon, 29 Apr 2019 18:00:06 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jul 2019 05:54:08 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Mar 2020 09:36:06 GMT",
"version": "v3"
}
] | 2021-01-12 | [
[
"Bilski",
"Jakub",
""
],
[
"Marciano",
"Antonino",
""
]
] | This article sheds new light on the problem of cosmological reduction in Loop Quantum Gravity. We critically analyze Quantum Reduced Loop Gravity -- an attempt to extract the cosmological sector of the full theory. We reconsider the reduction procedure applied to the states of the kinematical Hilbert space, developing ... |
1707.08226 | Carlos Augusto Romero Filho | A. B. Barreto, M. L. Pucheu, C. Romero | Weyl frames and canonical transformations in geometrical scalar-tensor
theories of gravity | 5 pages | null | 10.1088/1361-6382/aaa53c | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider scalar-tensor theories of gravity defined in Weyl integrable
space-time and show that in the ADM formalism Weyl transformations
corresponding to change of frames induce canonical transformations between
different representations of the phase space. In this context, we discuss the
physical equivalence of t... | [
{
"created": "Tue, 25 Jul 2017 21:22:04 GMT",
"version": "v1"
}
] | 2018-02-14 | [
[
"Barreto",
"A. B.",
""
],
[
"Pucheu",
"M. L.",
""
],
[
"Romero",
"C.",
""
]
] | We consider scalar-tensor theories of gravity defined in Weyl integrable space-time and show that in the ADM formalism Weyl transformations corresponding to change of frames induce canonical transformations between different representations of the phase space. In this context, we discuss the physical equivalence of two... |
2212.05069 | Tucker Manton | Stephon Alexander and Tucker Manton | Pure gauge theory for the gravitational spin connection | 6 pages, 1 figure. References and discussion added, matches PRD
version | null | 10.1103/PhysRevD.107.064065 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational spin connection appears in gravity as a non-Abelian gauge
field for the Lorentz group $SO(3,1)$, which is non-compact. The action for
General Relativity is linear in the field strength associated to the spin
connection, and its equation of motion corresponds to the standard metricity
constraint. Con... | [
{
"created": "Fri, 9 Dec 2022 19:00:00 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Apr 2023 14:19:57 GMT",
"version": "v2"
}
] | 2023-04-05 | [
[
"Alexander",
"Stephon",
""
],
[
"Manton",
"Tucker",
""
]
] | The gravitational spin connection appears in gravity as a non-Abelian gauge field for the Lorentz group $SO(3,1)$, which is non-compact. The action for General Relativity is linear in the field strength associated to the spin connection, and its equation of motion corresponds to the standard metricity constraint. Conse... |
1203.3109 | Betti Hartmann | Yves Brihaye (Universite de Mons, Belgium) and Betti Hartmann (Jacobs
University Bremen, Germany) | Hairy charged Gauss-Bonnet solitons and black holes | 20 pages inlcuding 17 figures; v2: discussion on planar limit
included, new figure added; accepted for publication in Phys. Rev. D | null | 10.1103/PhysRevD.85.124024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of (4+1)-dimensional charged Gauss-Bonnet black holes
and solitons. We observe an instability related to the condensation of a scalar
field and construct explicit "hairy" black hole and soliton solutions of the
full system of coupled field equations. We investigate the cases of a massless
scala... | [
{
"created": "Wed, 14 Mar 2012 15:10:23 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jun 2012 13:31:12 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Brihaye",
"Yves",
"",
"Universite de Mons, Belgium"
],
[
"Hartmann",
"Betti",
"",
"Jacobs\n University Bremen, Germany"
]
] | We study the stability of (4+1)-dimensional charged Gauss-Bonnet black holes and solitons. We observe an instability related to the condensation of a scalar field and construct explicit "hairy" black hole and soliton solutions of the full system of coupled field equations. We investigate the cases of a massless scalar ... |
gr-qc/0102017 | Peter Dunsby | George F R Ellis | Cosmology and Local Physics | 20 pages LaTeX | Int.J.Mod.Phys.A17:2667-2672,2002 | 10.1142/S0217751X02011588 | uct-cosmology-01/03 | gr-qc | null | This article is dedicated to the memory of Dennis Sciama. It revisits a
series of issues to which he devoted much time and effort, regarding the
relationship between local physics and the large scale structure of the
universe - in particular, Olber's paradox, Mach's principle, and the various
arrows of time. Thus the... | [
{
"created": "Mon, 5 Feb 2001 13:15:17 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Ellis",
"George F R",
""
]
] | This article is dedicated to the memory of Dennis Sciama. It revisits a series of issues to which he devoted much time and effort, regarding the relationship between local physics and the large scale structure of the universe - in particular, Olber's paradox, Mach's principle, and the various arrows of time. Thus the f... |
gr-qc/0512004 | J. Daniel Christensen | J. Daniel Christensen | Finiteness of Lorentzian 10j symbols and partition functions | 8 pages; v2 updates reference list and corrects very minor typos,
matching version to appear in Classical and Quantum Gravity | Class.Quant.Grav. 23 (2006) 1679-1688 | 10.1088/0264-9381/23/5/013 | null | gr-qc | null | We give a short and simple proof that the Lorentzian 10j symbol, which forms
a key part of the Barrett-Crane model of Lorentzian quantum gravity, is finite.
The argument is very general, and applies to other integrals. For example, we
show that the Lorentzian and Riemannian causal 10j symbols are finite, despite
thei... | [
{
"created": "Thu, 1 Dec 2005 00:53:59 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Feb 2006 03:53:10 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Christensen",
"J. Daniel",
""
]
] | We give a short and simple proof that the Lorentzian 10j symbol, which forms a key part of the Barrett-Crane model of Lorentzian quantum gravity, is finite. The argument is very general, and applies to other integrals. For example, we show that the Lorentzian and Riemannian causal 10j symbols are finite, despite their ... |
1209.0369 | Knut Bakke | Knut Bakke | Noninertial effects on the Dirac oscillator in a topological defect
spacetime | 13 pages, no figure | Eur. Phys. J. Plus 127, 82 (2012) | 10.1140/epjp/i2012-12082-2 | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the influence of noninertial effects on the Dirac
oscillator in the cosmic string spacetime background. We discuss the behaviour
of the oscillator frequency in a noninertial system that allows us to obtain
relativistic bound state solutions. We also discuss the influence of the
topology of the... | [
{
"created": "Mon, 3 Sep 2012 14:49:28 GMT",
"version": "v1"
}
] | 2012-09-04 | [
[
"Bakke",
"Knut",
""
]
] | In this paper, we study the influence of noninertial effects on the Dirac oscillator in the cosmic string spacetime background. We discuss the behaviour of the oscillator frequency in a noninertial system that allows us to obtain relativistic bound state solutions. We also discuss the influence of the topology of the c... |
gr-qc/0205098 | Carlos F. Sopuerta | Francesc Fayos (1) and Carlos F. Sopuerta (2) ((1) Departament de
Fisica Aplicada, UPC, Spain (2) ICG, Portsmouth U) | Consequences of a Killing symmetry in spacetime's local structure | 20 pages, LaTeX2e, IOP style. Revised version accepted for
publication in Classical and Quantum Gravity | Class.Quant.Grav. 19 (2002) 5489-5506 | 10.1088/0264-9381/19/21/314 | null | gr-qc | null | In this paper we discuss the consequences of a Killing symmetry on the local
geometrical structure of four-dimensional spacetimes. We have adopted the point
of view introduced in recent works where the exterior derivative of the Killing
plays a fundamental role. Then, we study some issues related with this approach
a... | [
{
"created": "Wed, 22 May 2002 14:02:32 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Sep 2002 06:15:42 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Fayos",
"Francesc",
""
],
[
"Sopuerta",
"Carlos F.",
""
]
] | In this paper we discuss the consequences of a Killing symmetry on the local geometrical structure of four-dimensional spacetimes. We have adopted the point of view introduced in recent works where the exterior derivative of the Killing plays a fundamental role. Then, we study some issues related with this approach and... |
gr-qc/0609012 | T. Padmanabhan | T. Padmanabhan | Why Does Gravity Ignore the Vacuum Energy? | Invited Contribution to the IJMPD Special Issue on Dark Matter and
Dark Energy edited by D.Ahluwalia and D. Grumiller. Appendix clarifies
several conceptual and pedgogical aspects of surface term in Hilbert action;
ver.2: references and some clarifications added | Int.J.Mod.Phys.D15:2029-2058,2006 | 10.1142/S0218271806009455 | null | gr-qc astro-ph hep-th | null | The equations of motion for matter fields are invariant under the shift of
the matter lagrangian by a constant. Such a shift changes the energy momentum
tensor of matter by T^a_b --> T^a_b +\rho \delta^a_b. In the conventional
approach, gravity breaks this symmetry and the gravitational field equations
are not invari... | [
{
"created": "Tue, 5 Sep 2006 12:51:28 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Oct 2006 10:18:44 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Padmanabhan",
"T.",
""
]
] | The equations of motion for matter fields are invariant under the shift of the matter lagrangian by a constant. Such a shift changes the energy momentum tensor of matter by T^a_b --> T^a_b +\rho \delta^a_b. In the conventional approach, gravity breaks this symmetry and the gravitational field equations are not invarian... |
1807.08468 | Massimo Cerdonio | Massimo Cerdonio | About the measure of the bare cosmological constant | discussion expanded with additional references; | Foundations of Physics 49, 830 - 836 (2019) | 10.1007/s10701-019-00285-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I try to revive, and possibly reconcile, a debate started a few years ago,
about the relative roles of a bare cosmological constant and of a vacuum
energy, by taking the attitude to try to get the most from the physics now
available as established. I notice that the bare cosmological constant of the
Einstein equation... | [
{
"created": "Mon, 23 Jul 2018 08:01:22 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Jul 2018 15:17:51 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Oct 2018 17:16:32 GMT",
"version": "v3"
},
{
"created": "Thu, 14 Mar 2019 18:13:07 GMT",
"version": "v4"
}
] | 2019-09-19 | [
[
"Cerdonio",
"Massimo",
""
]
] | I try to revive, and possibly reconcile, a debate started a few years ago, about the relative roles of a bare cosmological constant and of a vacuum energy, by taking the attitude to try to get the most from the physics now available as established. I notice that the bare cosmological constant of the Einstein equations,... |
gr-qc/9601014 | Gerard 't Hooft | G. 't Hooft | Quantization of Point Particles in 2+1 Dimensional Gravity and
Space-Time Discreteness | 23 pages Plain TeX, 3 Figures | Class.Quant.Grav.13:1023-1040,1996 | 10.1088/0264-9381/13/5/018 | THU-96/02 | gr-qc | null | By investigating the canonical commutation rules for gravitating quantized
particles in a 2+1 dimensional world it is found that these particles live on a
space-time lattice. The space-time lattice points can be characterized by three
integers. Various representations are possible, the details depending on the
topolo... | [
{
"created": "Wed, 10 Jan 1996 10:44:08 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Hooft",
"G. 't",
""
]
] | By investigating the canonical commutation rules for gravitating quantized particles in a 2+1 dimensional world it is found that these particles live on a space-time lattice. The space-time lattice points can be characterized by three integers. Various representations are possible, the details depending on the topology... |
2107.01645 | Jay Solanki | Jay Solanki, Rohan Joshi and Malay Garg | Analytical Stellar Models of Neutron Stars in Teleparallel Gravity | made equations more readable and implemented some changes suggested
by reviewers | null | 10.1007/s12648-022-02446-5 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we developed three analytical models and obtained a new class
of solutions describing compact stellar structures using the theory of
teleparallel gravity. We consider the general anisotropic nature of stellar
configurations and solve teleparallel gravity equations. In order to thoroughly
analyze the va... | [
{
"created": "Sun, 4 Jul 2021 14:24:07 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jul 2021 16:29:24 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Oct 2021 09:58:19 GMT",
"version": "v3"
}
] | 2022-09-21 | [
[
"Solanki",
"Jay",
""
],
[
"Joshi",
"Rohan",
""
],
[
"Garg",
"Malay",
""
]
] | In this paper, we developed three analytical models and obtained a new class of solutions describing compact stellar structures using the theory of teleparallel gravity. We consider the general anisotropic nature of stellar configurations and solve teleparallel gravity equations. In order to thoroughly analyze the vari... |
2011.12442 | Daniel Berkowitz | Daniel Berkowitz | Infrared Generalized Uncertainty Principles Applied To LRS Bianchi I
Quantum Cosmology | Submitted To Journal Of Korean Physical Society 9 pages 4 figures | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose two higher order generalized uncertainty principles(GUPs) which
predict a minimum uncertainty in momentum and apply the deformations that they
entail of the Heisenberg algebra to one half of the phase space of the LRS
Bianchi I models. After numerically solving the resultant Wheeler Dewitt
equations we ana... | [
{
"created": "Tue, 24 Nov 2020 23:15:18 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Nov 2020 16:17:34 GMT",
"version": "v2"
}
] | 2020-12-01 | [
[
"Berkowitz",
"Daniel",
""
]
] | We propose two higher order generalized uncertainty principles(GUPs) which predict a minimum uncertainty in momentum and apply the deformations that they entail of the Heisenberg algebra to one half of the phase space of the LRS Bianchi I models. After numerically solving the resultant Wheeler Dewitt equations we analy... |
1804.05531 | Hao Tang | Hao Tang, Bin Wu, Cheng-yi Sun, Yu Song, Rui-hong Yue | Entropy of Vaidya Black Hole on Apparent Horizon with Minimal length
Revisited | 8pages, 0 figures, Int J Theor Phys(2018) | null | 10.1007/s10773-018-3739-x | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | By considering the generalized uncertainty principle, the degrees of freedom
near the apparent horizon of Vaidya black hole are calculated with thin film
model. The result shows that a cut-off can be introduced naturally rather than
taking by hand. Furthermore, if the minimal length is chosen to be a specific
value, ... | [
{
"created": "Mon, 16 Apr 2018 07:46:47 GMT",
"version": "v1"
}
] | 2018-04-17 | [
[
"Tang",
"Hao",
""
],
[
"Wu",
"Bin",
""
],
[
"Sun",
"Cheng-yi",
""
],
[
"Song",
"Yu",
""
],
[
"Yue",
"Rui-hong",
""
]
] | By considering the generalized uncertainty principle, the degrees of freedom near the apparent horizon of Vaidya black hole are calculated with thin film model. The result shows that a cut-off can be introduced naturally rather than taking by hand. Furthermore, if the minimal length is chosen to be a specific value, th... |
1109.2190 | Ali Shojai | Ali Shojai and Fatimah Shojai | Some static spherically symmetric interior solutions of $f(R)$ gravity | To appear in General Relativity and Gravitation, 2011 | null | 10.1007/s10714-011-1271-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have found some new exact static spherically symmetric interior solutions
of metric $f(R)$ gravitational theories describing the equilibrium
configuration of a star. Then the solution is matched to the exterior solution
and thus gives a complete description of a star in $R^{1-n/2}$ theory.
| [
{
"created": "Sat, 10 Sep 2011 03:44:28 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Shojai",
"Ali",
""
],
[
"Shojai",
"Fatimah",
""
]
] | We have found some new exact static spherically symmetric interior solutions of metric $f(R)$ gravitational theories describing the equilibrium configuration of a star. Then the solution is matched to the exterior solution and thus gives a complete description of a star in $R^{1-n/2}$ theory. |
0710.5460 | Jarmo M\"akel\"a Dr. | Jarmo M\"akel\"a | Pioneer Effect: An Interesting Numerical Coincidence | 15 pages, no figures | null | null | null | gr-qc | null | We note that if we construct from the observed anomalous acceleration
$a_P=(8.74\pm1.33)\times 10^{-10}m/s^2$ of the spacecrafts Pioneer 10 and 11
towards the Sun, the proton mass $m_p$ and Newton's gravitational constant $G$
a quantity $\ell_P:=(Gm_p/a_P)^{1/2}$, which has the same dimension as length,
then $\ell_P$... | [
{
"created": "Mon, 29 Oct 2007 15:56:17 GMT",
"version": "v1"
}
] | 2007-10-30 | [
[
"Mäkelä",
"Jarmo",
""
]
] | We note that if we construct from the observed anomalous acceleration $a_P=(8.74\pm1.33)\times 10^{-10}m/s^2$ of the spacecrafts Pioneer 10 and 11 towards the Sun, the proton mass $m_p$ and Newton's gravitational constant $G$ a quantity $\ell_P:=(Gm_p/a_P)^{1/2}$, which has the same dimension as length, then $\ell_P$ i... |
1912.12845 | Roberto Chan | R. Chan, M. F. A. da Silva and V. H. Satheeshkumar | Existence of New Singularities in Einstein-Aether Theory | 9 pages and no figures. Some typos are corrected in this version and
included an additional discussion in the Conclusions. Accepted for
publication in JCAP | null | 10.1088/1475-7516/2020/05/025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | How do the global properties of a Lorentzian manifold change when endowed
with a vector field? This interesting question is tackled in this paper within
the framework of Einstein-Aether (EA) theory which has the most general
diffeomorphism-invariant action involving a spacetime metric and a vector
field. After classi... | [
{
"created": "Mon, 30 Dec 2019 08:23:57 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Feb 2020 20:14:19 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Apr 2020 11:25:58 GMT",
"version": "v3"
}
] | 2020-05-20 | [
[
"Chan",
"R.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Satheeshkumar",
"V. H.",
""
]
] | How do the global properties of a Lorentzian manifold change when endowed with a vector field? This interesting question is tackled in this paper within the framework of Einstein-Aether (EA) theory which has the most general diffeomorphism-invariant action involving a spacetime metric and a vector field. After classify... |
1808.01304 | Stefano Antonini | Stefano Antonini and Giovanni Montani | Singularity-free and non-chaotic inhomogeneous Mixmaster in polymer
representation for the volume of the universe | 11 pages, 4 figures, to appear on Physics Letters B | null | 10.1016/j.physletb.2019.01.050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the semiclassical polymer dynamics of the inhomogeneous Mixmaster
model by choosing the cubed scale factor as the discretized configurational
variable, while the anisotropies remain pure Einsteinian variables. Such a
modified theory of gravity should be regarded as the appropriate framework to
describe the... | [
{
"created": "Fri, 3 Aug 2018 18:40:53 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Oct 2018 03:20:21 GMT",
"version": "v2"
},
{
"created": "Fri, 25 Jan 2019 01:18:52 GMT",
"version": "v3"
}
] | 2019-02-06 | [
[
"Antonini",
"Stefano",
""
],
[
"Montani",
"Giovanni",
""
]
] | We analyze the semiclassical polymer dynamics of the inhomogeneous Mixmaster model by choosing the cubed scale factor as the discretized configurational variable, while the anisotropies remain pure Einsteinian variables. Such a modified theory of gravity should be regarded as the appropriate framework to describe the b... |
0708.2483 | Rickard Jonsson | Rickard Jonsson | Visualizing curved spacetime | 15 pages, 20 figures | Am.J.Phys.73:248,2005 | 10.1119/1.1830500 | null | gr-qc | null | I present a way to visualize the concept of curved spacetime. The result is a
curved surface with local coordinate systems (Minkowski Systems) living on it,
giving the local directions of space and time. Relative to these systems,
special relativity holds. The method can be used to visualize gravitational
time dilati... | [
{
"created": "Sat, 18 Aug 2007 13:00:35 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Jonsson",
"Rickard",
""
]
] | I present a way to visualize the concept of curved spacetime. The result is a curved surface with local coordinate systems (Minkowski Systems) living on it, giving the local directions of space and time. Relative to these systems, special relativity holds. The method can be used to visualize gravitational time dilation... |
gr-qc/9709011 | Clifford M. Will | Clifford M. Will (Washington University, St. Louis) | Bounding the mass of the graviton using gravitional-wave observations of
inspiralling compact binaries | 8 pages, RevTeX, submitted to Phys. Rev. D | Phys.Rev.D57:2061-2068,1998 | 10.1103/PhysRevD.57.2061 | WUGRAV-97-4 | gr-qc | null | If gravitation is propagated by a massive field, then the velocity of
gravitational waves (gravitons) will depend upon their frequency and the
effective Newtonian potential will have a Yukawa form. In the case of
inspiralling compact binaries, gravitational waves emitted at low frequency
early in the inspiral will tr... | [
{
"created": "Thu, 4 Sep 1997 15:10:09 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Will",
"Clifford M.",
"",
"Washington University, St. Louis"
]
] | If gravitation is propagated by a massive field, then the velocity of gravitational waves (gravitons) will depend upon their frequency and the effective Newtonian potential will have a Yukawa form. In the case of inspiralling compact binaries, gravitational waves emitted at low frequency early in the inspiral will trav... |
1903.07059 | Orfeu Bertolami | Riccardo March, Orfeu Bertolami and Jorge P\'aramos, Simone
Dell'Agnello | Nonminimally coupled curvature-matter gravity models and Solar System
constraints | 6 pages; based on talk delivered by one of us (R. M.) at the 15th
Marcel Grossmann Meeting, Rome, July 2018 | null | null | null | gr-qc astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss constraints to some nonminimally (NMC) coupled curvature-matter
models of gravity by means of Solar System experiments. First we discuss a NMC
gravity model which constitutes a natural extension of $1/R^n$ gravity to the
nonminimally coupled case. Such a NMC gravity model is able to predict the
observed ac... | [
{
"created": "Sun, 17 Mar 2019 11:08:03 GMT",
"version": "v1"
}
] | 2019-03-19 | [
[
"March",
"Riccardo",
""
],
[
"Bertolami",
"Orfeu",
""
],
[
"Páramos",
"Jorge",
""
],
[
"Dell'Agnello",
"Simone",
""
]
] | We discuss constraints to some nonminimally (NMC) coupled curvature-matter models of gravity by means of Solar System experiments. First we discuss a NMC gravity model which constitutes a natural extension of $1/R^n$ gravity to the nonminimally coupled case. Such a NMC gravity model is able to predict the observed acce... |
2104.01751 | Snehasish Bhattacharjee | Snehasish Bhattacharjee | Inflation in mimetic $f(R,T)$ gravity | null | New Astronomy, 90, 101657 (2022) | 10.1016/j.newast.2021.101657 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we employ mimetic $f(R,T)$ gravity coupled with Lagrange
multiplier and mimetic potential to yield viable inflationary cosmological
solutions consistent with latest Planck and BICEP2/Keck Array data. We present
here three viable inflationary solutions of the Hubble parameter ($H$)
represented by $H(N)=... | [
{
"created": "Mon, 5 Apr 2021 03:21:44 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jul 2021 04:13:55 GMT",
"version": "v2"
}
] | 2021-07-28 | [
[
"Bhattacharjee",
"Snehasish",
""
]
] | In this paper, we employ mimetic $f(R,T)$ gravity coupled with Lagrange multiplier and mimetic potential to yield viable inflationary cosmological solutions consistent with latest Planck and BICEP2/Keck Array data. We present here three viable inflationary solutions of the Hubble parameter ($H$) represented by $H(N)=\l... |
1001.3048 | Leonardo Fernandez-Jambrina | L. Fernandez-Jambrina, R. Lazkoz | Cosmological singularities in FLRW spacetimes | 3 pages, ws-procs975x65.cls to appear in Proceedings of 12th Marcel
Grossmann Meeting, Paris | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this talk we review the appearance of new types of singularities (big rip,
sudden singularities...) in FLRW cosmological models that have arisen on
considering explanations for accelerated expansion of our universe.
| [
{
"created": "Mon, 18 Jan 2010 13:06:27 GMT",
"version": "v1"
}
] | 2010-01-19 | [
[
"Fernandez-Jambrina",
"L.",
""
],
[
"Lazkoz",
"R.",
""
]
] | In this talk we review the appearance of new types of singularities (big rip, sudden singularities...) in FLRW cosmological models that have arisen on considering explanations for accelerated expansion of our universe. |
gr-qc/0202020 | null | M.A. Abramowicz, G.J.E. Almergren, W. Klu{\'z}niak, A.V. Thampan, F.
Wallinder | Holonomy invariance, orbital resonances, and kilohertz QPOs | null | Class.Quant.Grav.19:L57-L62,2002 | 10.1088/0264-9381/19/8/103 | null | gr-qc astro-ph | null | Quantized orbital structures are typical for many aspects of classical
gravity (Newton's as well as Einstein's). The astronomical phenomenon of
orbital resonances is a well-known example. Recently, Rothman, Ellis and
Murugan (2001) discussed quantized orbital structures in the novel context of a
holonomy invariance o... | [
{
"created": "Wed, 6 Feb 2002 21:55:48 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Abramowicz",
"M. A.",
""
],
[
"Almergren",
"G. J. E.",
""
],
[
"Klu{ź}niak",
"W.",
""
],
[
"Thampan",
"A. V.",
""
],
[
"Wallinder",
"F.",
""
]
] | Quantized orbital structures are typical for many aspects of classical gravity (Newton's as well as Einstein's). The astronomical phenomenon of orbital resonances is a well-known example. Recently, Rothman, Ellis and Murugan (2001) discussed quantized orbital structures in the novel context of a holonomy invariance of ... |
2106.05083 | Damianos Iosifidis | Damianos Iosifidis, Nurgissa Myrzakulov, Ratbay Myrzakulov | Metric-Affine Version of Myrzakulov $F(R,T,Q, {\cal T})$ Gravity and
Cosmological Applications | 11 pages, no figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We derive the full set of field equations for the Metric-Affine version of
the Myrzakulov gravity model and also extend this family of theories to a
broader one. More specifically, we consider theories whose gravitational
Lagrangian is given by $F(R,T,Q, {\cal T},{\cal D})$ where $T$, $Q$ are the
torsion and non-metr... | [
{
"created": "Wed, 9 Jun 2021 14:01:35 GMT",
"version": "v1"
}
] | 2021-06-10 | [
[
"Iosifidis",
"Damianos",
""
],
[
"Myrzakulov",
"Nurgissa",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | We derive the full set of field equations for the Metric-Affine version of the Myrzakulov gravity model and also extend this family of theories to a broader one. More specifically, we consider theories whose gravitational Lagrangian is given by $F(R,T,Q, {\cal T},{\cal D})$ where $T$, $Q$ are the torsion and non-metric... |
gr-qc/9912121 | Nobuyuki Sakai | Nobuyuki Sakai (YITP, Kyoto U.) | Topological Defect Inflation | 8 pages, latex, 6 ps figures included, talk given at 9th Workshop on
General Relativity and Gravitation, Hiroshima, Nov 1999 | null | null | null | gr-qc astro-ph hep-ph | null | We address some issues of topological defect inflation. (1) We clarify the
causal structure of an inflating magnetic monopole. The spacetime diagram shows
explicitly that this model is free from the ``graceful exit'' problem, while
the monopole itself undergoes ``eternal inflation''. (2) We extend the study of
inflat... | [
{
"created": "Fri, 31 Dec 1999 10:18:34 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Jan 2000 14:32:47 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Sakai",
"Nobuyuki",
"",
"YITP, Kyoto U."
]
] | We address some issues of topological defect inflation. (1) We clarify the causal structure of an inflating magnetic monopole. The spacetime diagram shows explicitly that this model is free from the ``graceful exit'' problem, while the monopole itself undergoes ``eternal inflation''. (2) We extend the study of inflatin... |
2211.03861 | Andrea Fontanella | Andrea Fontanella | Non-extremal near-horizon geometries | v2: 14 pages, comment added regarding the validity of the result to a
class of near-horizon geometries where higher order corrections to equation
(1.4) are set to zero. Section 1.3.1 added on applications of the result.
Version accepted for publication in Classical and Quantum Gravity | Class. Quantum Grav. 40 135006 (2023) | 10.1088/1361-6382/acd980 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | When Gaussian null coordinates are adapted to a Killing horizon, the
near-horizon limit is defined by a coordinate rescaling and then by taking the
regulator parameter $\varepsilon$ to be small, as a way of zooming into the
horizon hypersurface. In this coordinate setting, it is known that the metric
of a non-extrema... | [
{
"created": "Mon, 7 Nov 2022 21:00:11 GMT",
"version": "v1"
},
{
"created": "Fri, 26 May 2023 13:52:33 GMT",
"version": "v2"
}
] | 2023-06-08 | [
[
"Fontanella",
"Andrea",
""
]
] | When Gaussian null coordinates are adapted to a Killing horizon, the near-horizon limit is defined by a coordinate rescaling and then by taking the regulator parameter $\varepsilon$ to be small, as a way of zooming into the horizon hypersurface. In this coordinate setting, it is known that the metric of a non-extremal ... |
2104.03192 | Yutong He | Yutong He, Axel Brandenburg, Aditya Sinha | Tensor spectrum of turbulence-sourced gravitational waves as a
constraint on graviton mass | 15 pages, 3 figures, 2 tables, comments welcome | JCAP07(2021)015 | 10.1088/1475-7516/2021/07/015 | NORDITA 2021-029 | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We consider a generic dispersive massive gravity theory and numerically study
its resulting modified energy and strain spectra of tensor gravitational waves
(GWs) sourced by (i) fully developed turbulence during the electroweak phase
transition (EWPT) and (ii) forced hydromagnetic turbulence during the QCD phase
tran... | [
{
"created": "Wed, 7 Apr 2021 15:31:47 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jul 2021 09:39:10 GMT",
"version": "v2"
}
] | 2021-07-12 | [
[
"He",
"Yutong",
""
],
[
"Brandenburg",
"Axel",
""
],
[
"Sinha",
"Aditya",
""
]
] | We consider a generic dispersive massive gravity theory and numerically study its resulting modified energy and strain spectra of tensor gravitational waves (GWs) sourced by (i) fully developed turbulence during the electroweak phase transition (EWPT) and (ii) forced hydromagnetic turbulence during the QCD phase transi... |
gr-qc/0512071 | Michele Arzano | Michele Arzano | Black hole entropy, log corrections and quantum ergosphere | RevTex4, 10 pages, no figures | Phys.Lett. B634 (2006) 536-540 | 10.1016/j.physletb.2006.02.020 | null | gr-qc hep-th | null | Quantum-gravity corrections to the probability of emission of a particle from
a black hole in the Parikh-Wilczek tunneling framework are studied. We consider
the effects of zero-point quantum fluctuations of the metric on the emission
probability for a tunneling shell. Quantum properties of the geometry are
responsib... | [
{
"created": "Mon, 12 Dec 2005 19:49:15 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Arzano",
"Michele",
""
]
] | Quantum-gravity corrections to the probability of emission of a particle from a black hole in the Parikh-Wilczek tunneling framework are studied. We consider the effects of zero-point quantum fluctuations of the metric on the emission probability for a tunneling shell. Quantum properties of the geometry are responsible... |
gr-qc/0405057 | Rainer Verch | Mario Paschke, Rainer Verch | Local covariant quantum field theory over spectral geometries | 21 pages, 2 figures | Class.Quant.Grav. 21 (2004) 5299-5316 | 10.1088/0264-9381/21/23/001 | null | gr-qc hep-th math-ph math.MP | null | A framework which combines ideas from Connes' noncommutative geometry, or
spectral geometry, with recent ideas on generally covariant quantum field
theory, is proposed in the present work. A certain type of spectral geometries
modelling (possibly noncommutative) globally hyperbolic spacetimes is
introduced in terms o... | [
{
"created": "Tue, 11 May 2004 17:05:57 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Paschke",
"Mario",
""
],
[
"Verch",
"Rainer",
""
]
] | A framework which combines ideas from Connes' noncommutative geometry, or spectral geometry, with recent ideas on generally covariant quantum field theory, is proposed in the present work. A certain type of spectral geometries modelling (possibly noncommutative) globally hyperbolic spacetimes is introduced in terms of ... |
gr-qc/0611145 | Anil Zengino\u{g}lu C | Anil Zenginoglu | Numerical calculations near spatial infinity | 10 pages, 2 postscript figures, uses psfrag; to appear in the
Proceedings of the Spanish Relativity Meeting (ERE 2006), Palma de Mallorca,
Spain, 4-8 September 2006 | J.Phys.Conf.Ser.66:012027,2007 | 10.1088/1742-6596/66/1/012027 | AEI-2006-087 | gr-qc | null | After describing in short some problems and methods regarding the smoothness
of null infinity for isolated systems, I present numerical calculations in
which both spatial and null infinity can be studied. The reduced conformal
field equations based on the conformal Gauss gauge allow us in spherical
symmetry to calcul... | [
{
"created": "Tue, 28 Nov 2006 12:14:08 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Zenginoglu",
"Anil",
""
]
] | After describing in short some problems and methods regarding the smoothness of null infinity for isolated systems, I present numerical calculations in which both spatial and null infinity can be studied. The reduced conformal field equations based on the conformal Gauss gauge allow us in spherical symmetry to calculat... |
2306.06759 | Pinaki Roy | Pinaki Roy, Bharat Kumar | Neutron Star properties in $f(\mathcal{R})$ gravity | 21 pages, 1 figure; undertaken in 2019 | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | In this work, we systematically derive the Einstein field equations in
general relativity and $f(\mathcal{R})$ gravity, the Tolman-Oppenheimer-Volkoff
(TOV) equation, and the expressions for axial and polar Tidal Love Numbers
(TLNs) for neutron stars. The derivations are sourced from existing literature
and elaborate... | [
{
"created": "Sun, 11 Jun 2023 20:06:37 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jun 2023 01:13:09 GMT",
"version": "v2"
}
] | 2023-06-14 | [
[
"Roy",
"Pinaki",
""
],
[
"Kumar",
"Bharat",
""
]
] | In this work, we systematically derive the Einstein field equations in general relativity and $f(\mathcal{R})$ gravity, the Tolman-Oppenheimer-Volkoff (TOV) equation, and the expressions for axial and polar Tidal Love Numbers (TLNs) for neutron stars. The derivations are sourced from existing literature and elaborated ... |
1711.09041 | Carlos O. Lousto | James Healy, Carlos O. Lousto, Ian Ruchlin, and Yosef Zlochower | Evolutions of unequal mass, highly spinning black hole binaries | 8 pages, 6 figures. arXiv admin note: substantial text overlap with
arXiv:1706.01980 | Phys. Rev. D 97, 104026 (2018) | 10.1103/PhysRevD.97.104026 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We evolve a binary black hole system bearing a mass ratio of $q=m_1/m_2=2/3$
and individual spins of $S^z_1/m_1^2=0.95$ and $S^z_2/m_2^2=-0.95$ in a
configuration where the large black hole has its spin antialigned with the
orbital angular momentum, $L^z$, and the small black hole has its spin aligned
with $L^z$. Thi... | [
{
"created": "Wed, 22 Nov 2017 18:32:10 GMT",
"version": "v1"
}
] | 2018-05-23 | [
[
"Healy",
"James",
""
],
[
"Lousto",
"Carlos O.",
""
],
[
"Ruchlin",
"Ian",
""
],
[
"Zlochower",
"Yosef",
""
]
] | We evolve a binary black hole system bearing a mass ratio of $q=m_1/m_2=2/3$ and individual spins of $S^z_1/m_1^2=0.95$ and $S^z_2/m_2^2=-0.95$ in a configuration where the large black hole has its spin antialigned with the orbital angular momentum, $L^z$, and the small black hole has its spin aligned with $L^z$. This ... |
2008.10050 | Bing Tang | Bing Tang | Temporal and spatial chaos in the Kerr-AdS black hole in an extended
phase space | To be published in Chinese Physics C | null | 10.1088/1674-1137/abe369 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the Melnikov method, we investigate chaotic behaviors in the
extended thermodynamic phase space for a slowly rotating Kerr-AdS black hole
under temporal and spatial perturbations. Our results show that the temporal
perturbation coming from a thermal quench of the spinodal region in the phase
diagram may caus... | [
{
"created": "Sun, 23 Aug 2020 14:35:41 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Feb 2021 13:07:05 GMT",
"version": "v2"
}
] | 2021-02-08 | [
[
"Tang",
"Bing",
""
]
] | Based on the Melnikov method, we investigate chaotic behaviors in the extended thermodynamic phase space for a slowly rotating Kerr-AdS black hole under temporal and spatial perturbations. Our results show that the temporal perturbation coming from a thermal quench of the spinodal region in the phase diagram may cause ... |
2107.08269 | Osvaldo Pablo Santillan | Juliana Osorio Morales and Osvaldo Santill\'an | The appearance of non trivial torsion for some Ricci dependent theories
in the Palatini formalism | Some points clarified, 20 pages | null | null | null | gr-qc hep-th math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As is known from studies of gravity models in the Palatini formalism, there
exist two inequivalent definitions of the generalized Ricci tensor in terms of
the generalized curvature namely, $\widetilde{R}_{\mu\nu}=R^\rho_{\mu\rho\nu}$
and $R^\mu_{\nu}=g^{\alpha\beta}R^\mu_{\alpha\nu\beta}$. A deep formal
investigation... | [
{
"created": "Sat, 17 Jul 2021 16:09:27 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jul 2021 17:35:50 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Oct 2021 00:02:39 GMT",
"version": "v3"
}
] | 2021-10-14 | [
[
"Morales",
"Juliana Osorio",
""
],
[
"Santillán",
"Osvaldo",
""
]
] | As is known from studies of gravity models in the Palatini formalism, there exist two inequivalent definitions of the generalized Ricci tensor in terms of the generalized curvature namely, $\widetilde{R}_{\mu\nu}=R^\rho_{\mu\rho\nu}$ and $R^\mu_{\nu}=g^{\alpha\beta}R^\mu_{\alpha\nu\beta}$. A deep formal investigation o... |
2108.01679 | Armando A Roque Roque | Juan Barranco, Javier Chagoya, Alberto Diez-Tejedor, Gustavo Niz,
Armando A. Roque | Horndeski stars | 49+1 pages, 17 figures, 2 tables. To appear in JCAP | JCAP10(2021)022 | 10.1088/1475-7516/2021/10/022 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish the existence of time-dependent solitons in a modified gravity
framework, which is defined by the low energy limit of theories with a weakly
broken galileon symmetry and a mass term. These are regular vacuum
configurations of finite energy characterized by a single continuous parameter
representing the a... | [
{
"created": "Tue, 3 Aug 2021 18:00:14 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Oct 2021 17:39:33 GMT",
"version": "v2"
}
] | 2021-10-18 | [
[
"Barranco",
"Juan",
""
],
[
"Chagoya",
"Javier",
""
],
[
"Diez-Tejedor",
"Alberto",
""
],
[
"Niz",
"Gustavo",
""
],
[
"Roque",
"Armando A.",
""
]
] | We establish the existence of time-dependent solitons in a modified gravity framework, which is defined by the low energy limit of theories with a weakly broken galileon symmetry and a mass term. These are regular vacuum configurations of finite energy characterized by a single continuous parameter representing the amp... |
1306.5564 | Enrico Barausse | Enrico Barausse and Luis Lehner | A Post-Newtonian approach to black hole-fluid systems | 14 pages, 2 figures. Version resubmitted to PRD with minor revisions
in response to referee report | Phys. Rev. D 88, 024029 (2013) | 10.1103/PhysRevD.88.024029 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work devises a formalism to obtain the equations of motion for a black
hole-fluid configuration. Our approach is based on a Post-Newtonian expansion
and adapted to scenarios where obtaining the relevant dynamics requires long
time-scale evolutions. These systems are typically studied with Newtonian
approaches, w... | [
{
"created": "Mon, 24 Jun 2013 10:23:49 GMT",
"version": "v1"
}
] | 2013-08-01 | [
[
"Barausse",
"Enrico",
""
],
[
"Lehner",
"Luis",
""
]
] | This work devises a formalism to obtain the equations of motion for a black hole-fluid configuration. Our approach is based on a Post-Newtonian expansion and adapted to scenarios where obtaining the relevant dynamics requires long time-scale evolutions. These systems are typically studied with Newtonian approaches, whi... |
2104.10332 | Joshua Baines | Joshua Baines | Unit-Lapse Forms of Various Spacetimes | 154 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Every spacetime is defined by its metric, the mathematical object which
further defines the spacetime curvature. From the relativity principle, we have
the freedom to choose which coordinate system to write our metric in. Some
coordinate systems, however, are better than others. In this text, we begin
with a brief in... | [
{
"created": "Wed, 21 Apr 2021 03:10:59 GMT",
"version": "v1"
}
] | 2021-04-22 | [
[
"Baines",
"Joshua",
""
]
] | Every spacetime is defined by its metric, the mathematical object which further defines the spacetime curvature. From the relativity principle, we have the freedom to choose which coordinate system to write our metric in. Some coordinate systems, however, are better than others. In this text, we begin with a brief intr... |
2008.00814 | Pradip Mukherjee | Rabin Banerjee, Sk. Moinuddin, and Pradip Mukherjee | A new approach for nonrelativistic bosonic string in flat space time | 22 pages, latex; extended calculations, typos corrected. This version
is to appear in Phys. Rev. D | Phys. Rev. D 103, 046020 (2021) | 10.1103/PhysRevD.103.046020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new approach to the study of nonrelativistic bosonic string in flat space
time is introduced, basing on a holistic hamiltonian analysis of the minimal
action for the string. This leads to a structurally new form of the action
which is, however, equivalent to the known results since, under appropriate
limits, it int... | [
{
"created": "Mon, 3 Aug 2020 12:08:57 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Feb 2021 14:49:44 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Banerjee",
"Rabin",
""
],
[
"Moinuddin",
"Sk.",
""
],
[
"Mukherjee",
"Pradip",
""
]
] | A new approach to the study of nonrelativistic bosonic string in flat space time is introduced, basing on a holistic hamiltonian analysis of the minimal action for the string. This leads to a structurally new form of the action which is, however, equivalent to the known results since, under appropriate limits, it inter... |
2101.07849 | Christof Wetterich | Christof Wetterich | Pregeometry and euclidean quantum gravity | Additional material on mode expansion., 24 pages | null | 10.1016/j.nuclphysb.2021.115526 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein's general relativity can emerge from pregeometry, with the metric
composed of more fundamental fields. We formulate euclidean pregeometry as a
$SO(4)$ - Yang-Mills theory. In addition to the gauge fields we include a
vector field in the vector representation of the gauge group. The gauge - and
diffeomorphism... | [
{
"created": "Tue, 19 Jan 2021 20:19:37 GMT",
"version": "v1"
},
{
"created": "Fri, 7 May 2021 11:40:21 GMT",
"version": "v2"
},
{
"created": "Sun, 19 Sep 2021 17:38:55 GMT",
"version": "v3"
}
] | 2021-09-21 | [
[
"Wetterich",
"Christof",
""
]
] | Einstein's general relativity can emerge from pregeometry, with the metric composed of more fundamental fields. We formulate euclidean pregeometry as a $SO(4)$ - Yang-Mills theory. In addition to the gauge fields we include a vector field in the vector representation of the gauge group. The gauge - and diffeomorphism -... |
gr-qc/9909074 | Jerry B. Griffiths | S. Micciche and J. B. Griffiths | Soliton Solutions with Real Poles in the Alekseev formulation of the
Inverse-Scattering method | 8 pages, LaTeX | Class.Quant.Grav. 17 (2000) 1-9 | 10.1088/0264-9381/17/1/301 | null | gr-qc | null | A new approach to the inverse-scattering technique of Alekseev is presented
which permits real-pole soliton solutions of the Ernst equations to be
considered. This is achieved by adopting distinct real poles in the scattering
matrix and its inverse. For the case in which the electromagnetic field
vanishes, some expli... | [
{
"created": "Wed, 22 Sep 1999 16:06:12 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Micciche",
"S.",
""
],
[
"Griffiths",
"J. B.",
""
]
] | A new approach to the inverse-scattering technique of Alekseev is presented which permits real-pole soliton solutions of the Ernst equations to be considered. This is achieved by adopting distinct real poles in the scattering matrix and its inverse. For the case in which the electromagnetic field vanishes, some explici... |
1502.05877 | Sanjay Sarwe | Sanjay Sarwe | Role of Equation of State in formation of Black hole | 8 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the physical process of gravitational collapse of a perfect fluid
with a linear isentropic equation of state $p = k \rho, \ -1/3 < k \leq 1$. We
consider a model with ansatz $v'(t,r)/v(t,r) = \xi'(r)$ that give rise to a
family of solutions to Einstein equations with equation of state. The solution
so obtain... | [
{
"created": "Thu, 19 Feb 2015 10:30:57 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Mar 2015 13:28:27 GMT",
"version": "v2"
}
] | 2015-03-24 | [
[
"Sarwe",
"Sanjay",
""
]
] | We study the physical process of gravitational collapse of a perfect fluid with a linear isentropic equation of state $p = k \rho, \ -1/3 < k \leq 1$. We consider a model with ansatz $v'(t,r)/v(t,r) = \xi'(r)$ that give rise to a family of solutions to Einstein equations with equation of state. The solution so obtained... |
gr-qc/0001033 | Kazuya Koyama | Kazuya Koyama and Jiro Soda | Birth of the Brane World | 14 pages, no figure, to appear in Phys. Lett. B | Phys.Lett. B483 (2000) 432-442 | 10.1016/S0370-2693(00)00545-1 | KUCP0148 | gr-qc hep-th | null | Birth of the brane world is studied using the Hamiltonian approach. It is
shown that an inflating brane world can be created from nothing. The wave
function of the universe obtained from the Wheeler de-Witt equation and the
time-dependent Schr$\ddot{o}$dinger equation for quantized scalar fields on the
brane are the ... | [
{
"created": "Wed, 12 Jan 2000 06:46:00 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Apr 2000 06:02:21 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Koyama",
"Kazuya",
""
],
[
"Soda",
"Jiro",
""
]
] | Birth of the brane world is studied using the Hamiltonian approach. It is shown that an inflating brane world can be created from nothing. The wave function of the universe obtained from the Wheeler de-Witt equation and the time-dependent Schr$\ddot{o}$dinger equation for quantized scalar fields on the brane are the sa... |
gr-qc/9403017 | Ted Jacobson | Steven Corley and Ted Jacobson | Collapse of Kaluza-Klein Bubbles | 6 pages, plain LaTeX, UMDGR-94-089 | Phys.Rev.D49:6261-6263,1994 | 10.1103/PhysRevD.49.R6261 | null | gr-qc hep-th | null | Kaluza-Klein theory admits ``bubble" configurations, in which the
circumference of the fifth dimension shrinks to zero on some compact surface. A
three parameter family of such bubble initial data at a moment of time-symmetry
(some including a magnetic field) has been found by Brill and Horowitz,
generalizing the (ze... | [
{
"created": "Wed, 9 Mar 1994 18:57:18 GMT",
"version": "v1"
}
] | 2010-01-06 | [
[
"Corley",
"Steven",
""
],
[
"Jacobson",
"Ted",
""
]
] | Kaluza-Klein theory admits ``bubble" configurations, in which the circumference of the fifth dimension shrinks to zero on some compact surface. A three parameter family of such bubble initial data at a moment of time-symmetry (some including a magnetic field) has been found by Brill and Horowitz, generalizing the (zero... |
2004.06058 | Samuel Lepe | Fernando Izaurieta and Samuel Lepe | Cosmological Dark Matter Amplification through Dark Torsion | 10 pages | null | 10.1088/1361-6382/abb2d2 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A cosmological approach based on considering a cosmic background with
non-zero torsion is shown in order to give an option of explaining a possible
phantom evolution, not ruled out according to the current observational data.
We revise some aspects of the formal schemes on torsion and, according them, we
develop a fo... | [
{
"created": "Mon, 13 Apr 2020 16:33:06 GMT",
"version": "v1"
}
] | 2020-10-28 | [
[
"Izaurieta",
"Fernando",
""
],
[
"Lepe",
"Samuel",
""
]
] | A cosmological approach based on considering a cosmic background with non-zero torsion is shown in order to give an option of explaining a possible phantom evolution, not ruled out according to the current observational data. We revise some aspects of the formal schemes on torsion and, according them, we develop a form... |
1009.3849 | Gaetano Vilasi | G. Sparano, G. Vilasi, S. Vilasi | The gravity of light | Style is changed in standard latex, abstract has been reduced and the
order of sections has been changed | Class.Quant.Grav.28:195014,2011 | 10.1088/0264-9381/28/19/195014 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A solution of the old problem raised by Tolman, Ehrenfest, Podolsky and
Wheeler, concerning the lack of attraction of two light pencils "moving
parallel", is proposed, considering that the light can be source of nonlinear
gravitational waves corresponding (in the would be quantum theory of gravity)
to spin-1 massless... | [
{
"created": "Sun, 12 Sep 2010 16:24:15 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Sep 2010 00:07:40 GMT",
"version": "v2"
},
{
"created": "Sun, 3 Oct 2010 09:47:18 GMT",
"version": "v3"
},
{
"created": "Tue, 19 Oct 2010 21:40:31 GMT",
"version": "v4"
},
{
"cr... | 2011-09-23 | [
[
"Sparano",
"G.",
""
],
[
"Vilasi",
"G.",
""
],
[
"Vilasi",
"S.",
""
]
] | A solution of the old problem raised by Tolman, Ehrenfest, Podolsky and Wheeler, concerning the lack of attraction of two light pencils "moving parallel", is proposed, considering that the light can be source of nonlinear gravitational waves corresponding (in the would be quantum theory of gravity) to spin-1 massless p... |
gr-qc/0603115 | Xavier Siemens | Xavier Siemens, Jolien Creighton, Irit Maor, Saikat Ray Majumder, Kipp
Cannon, Jocelyn Read | Gravitational wave bursts from cosmic (super)strings: Quantitative
analysis and constraints | Replaced with version accepted for publication in PRD | Phys.Rev. D73 (2006) 105001 | 10.1103/PhysRevD.73.105001 | null | gr-qc astro-ph | null | We discuss data analysis techniques that can be used in the search for
gravitational wave bursts from cosmic strings. When data from multiple
interferometers are available, we describe consistency checks that can be used
to greatly reduce the false alarm rates. We construct an expression for the
rate of bursts for ar... | [
{
"created": "Wed, 29 Mar 2006 19:11:58 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Apr 2006 20:28:21 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Siemens",
"Xavier",
""
],
[
"Creighton",
"Jolien",
""
],
[
"Maor",
"Irit",
""
],
[
"Majumder",
"Saikat Ray",
""
],
[
"Cannon",
"Kipp",
""
],
[
"Read",
"Jocelyn",
""
]
] | We discuss data analysis techniques that can be used in the search for gravitational wave bursts from cosmic strings. When data from multiple interferometers are available, we describe consistency checks that can be used to greatly reduce the false alarm rates. We construct an expression for the rate of bursts for arbi... |
gr-qc/9712099 | null | Pedro F. Gonzalez-Diaz (IMAFF, CSIC, Madrid) | Representations of relativity, quantum gravity and cosmology | 16 pages, RevTex, To appear in Grav. and Cosmol | Grav.Cosmol. 3 (1997) 217-232 | null | IMAFF-RCA-97-10 | gr-qc | null | We review an attempt to set a suitable foundational principle for consistent
quantization of gravity based on the canonical formulation. It requires
extending the spacetime description of the relativistic postulates to also
encompass an alternative formulation in momentum-energy continuum where the
inertial physical ... | [
{
"created": "Mon, 29 Dec 1997 19:19:35 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Gonzalez-Diaz",
"Pedro F.",
"",
"IMAFF, CSIC, Madrid"
]
] | We review an attempt to set a suitable foundational principle for consistent quantization of gravity based on the canonical formulation. It requires extending the spacetime description of the relativistic postulates to also encompass an alternative formulation in momentum-energy continuum where the inertial physical la... |
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