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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0801.4770 | Arundhati Dasgupta | Arundhati Dasgupta | The gravitational path integral and trace of the diffeomorphisms | 20 pgs; | Gen.Rel.Grav.43:2237-2255,2011 | 10.1007/s10714-011-1179-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I give a resolution of the conformal mode divergence in the Euclidean
gravitational path-integral by isolating the trace of the diffeomorphisms and
its contribution to the Faddeev-Popov measure.
| [
{
"created": "Wed, 30 Jan 2008 21:28:50 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Aug 2008 19:51:18 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Mar 2010 22:15:09 GMT",
"version": "v3"
}
] | 2011-07-21 | [
[
"Dasgupta",
"Arundhati",
""
]
] | I give a resolution of the conformal mode divergence in the Euclidean gravitational path-integral by isolating the trace of the diffeomorphisms and its contribution to the Faddeev-Popov measure. |
1901.04732 | Carlo Rovelli | Carlo Rovelli | Viewpoint: Black Hole Evolution Traced Out with Loop Quantum Gravity | Appeared as "Viewpoint" in the APS Physics Journal. Slightly edited,
completed references | Physics, 11 (2018) 127 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop Quantum gravity predicts that black holes evolve into white holes.
| [
{
"created": "Tue, 15 Jan 2019 09:49:27 GMT",
"version": "v1"
}
] | 2019-01-16 | [
[
"Rovelli",
"Carlo",
""
]
] | Loop Quantum gravity predicts that black holes evolve into white holes. |
1910.13203 | Swetha Bhagwat | Swetha Bhagwat, Miriam Cabero, Collin D. Capano, Badri Krishnan,
Duncan A. Brown | Detectability of the subdominant mode in a binary black hole ringdown | 7 figures, 2 tables | Phys. Rev. D 102, 024023 (2020) | 10.1103/PhysRevD.102.024023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ringdown is the late part of the post-merger signature emitted during the
coalescence of two black holes and comprises of a superposition of
quasi-normal-modes. Within general relativity, because of the no-hair theorems,
the frequencies and damping times of these modes are entirely determined by the
mass and angu... | [
{
"created": "Tue, 29 Oct 2019 11:25:01 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Oct 2019 09:15:28 GMT",
"version": "v2"
}
] | 2020-07-15 | [
[
"Bhagwat",
"Swetha",
""
],
[
"Cabero",
"Miriam",
""
],
[
"Capano",
"Collin D.",
""
],
[
"Krishnan",
"Badri",
""
],
[
"Brown",
"Duncan A.",
""
]
] | The ringdown is the late part of the post-merger signature emitted during the coalescence of two black holes and comprises of a superposition of quasi-normal-modes. Within general relativity, because of the no-hair theorems, the frequencies and damping times of these modes are entirely determined by the mass and angula... |
gr-qc/0201001 | Clifford M. Will | Michael E. Pati and Clifford M. Will | Post-Newtonian gravitational radiation and equations of motion via
direct integration of the relaxed Einstein equations. II. Two-body equations
of motion to second post-Newtonian order, and radiation-reaction to 3.5
post-Newtonian order | 33 pages, 1 figure, to be submitted to Physical Review D | Phys.Rev. D65 (2002) 104008 | 10.1103/PhysRevD.65.104008 | null | gr-qc | null | We derive the equations of motion for binary systems of compact bodies in the
post-Newtonian (PN) approximation to general relativity. Results are given
through 2PN order (order (v/c)^4 beyond Newtonian theory), and for
gravitational radiation reaction effects at 2.5PN and 3.5PN orders. The method
is based on a frame... | [
{
"created": "Mon, 31 Dec 2001 21:29:36 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Pati",
"Michael E.",
""
],
[
"Will",
"Clifford M.",
""
]
] | We derive the equations of motion for binary systems of compact bodies in the post-Newtonian (PN) approximation to general relativity. Results are given through 2PN order (order (v/c)^4 beyond Newtonian theory), and for gravitational radiation reaction effects at 2.5PN and 3.5PN orders. The method is based on a framewo... |
gr-qc/9610049 | Thomas Chen | Thomas Chen, William D. Walker, Jurg Dual (ETH Zurich, Switzerland) | Gravitational Forces with Strongly Localized Retardation | LaTeX, 19 pages, 3 figures. To appear in Phys. Rev. D | null | null | null | gr-qc | null | We solve the linearized Einstein equations for a specific oscillating mass
distribution and discuss the usual counterarguments against the existence of
observable gravitational retardations in the "near zone", where d/r << 1 (d =
oscillation amplitude of the source, r = distance from the source). We show
that they do... | [
{
"created": "Tue, 22 Oct 1996 20:29:52 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Oct 1996 20:27:00 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Nov 1996 12:04:33 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Chen",
"Thomas",
"",
"ETH Zurich, Switzerland"
],
[
"Walker",
"William D.",
"",
"ETH Zurich, Switzerland"
],
[
"Dual",
"Jurg",
"",
"ETH Zurich, Switzerland"
]
] | We solve the linearized Einstein equations for a specific oscillating mass distribution and discuss the usual counterarguments against the existence of observable gravitational retardations in the "near zone", where d/r << 1 (d = oscillation amplitude of the source, r = distance from the source). We show that they do n... |
2306.13134 | Claire Rigouzzo | Claire Rigouzzo and Sebastian Zell | Coupling Metric-Affine Gravity to the Standard Model and Dark Matter
Fermions | 54 pages, 3 appendices; v2: small improvements and moved some
material from main part to appendices, matches published version (up to
references) | Phys. Rev. D 108 (2023) 12, 124067 | 10.1103/PhysRevD.108.124067 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity (GR) exists in different formulations, which are
equivalent in pure gravity. Once matter is included, however, observable
predictions generically depend on the version of GR. In order to quantify the
resulting ambiguity, we employ metric-affine gravity, which encompasses as
special cases the metric... | [
{
"created": "Thu, 22 Jun 2023 18:00:03 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jan 2024 16:42:56 GMT",
"version": "v2"
}
] | 2024-01-04 | [
[
"Rigouzzo",
"Claire",
""
],
[
"Zell",
"Sebastian",
""
]
] | General Relativity (GR) exists in different formulations, which are equivalent in pure gravity. Once matter is included, however, observable predictions generically depend on the version of GR. In order to quantify the resulting ambiguity, we employ metric-affine gravity, which encompasses as special cases the metric, ... |
gr-qc/9902010 | Eric Poisson | Patrick Brady, Chris Chambers, William Laarakkers, and Eric Poisson | Radiative falloff in Schwarzschild-de Sitter spacetime | 10 pages, ReVTeX, 5 figures, references updated, and new section
added | Phys.Rev. D60 (1999) 064003 | 10.1103/PhysRevD.60.064003 | NSF-ITP-99-07 | gr-qc | null | We consider the time evolution of a scalar field propagating in
Schwarzschild-de Sitter spacetime. At early times, the field behaves as if it
were in pure Schwarzschild spacetime; the structure of spacetime far from the
black hole has no influence on the evolution. In this early epoch, the field's
initial outburst is... | [
{
"created": "Tue, 2 Feb 1999 22:46:33 GMT",
"version": "v1"
},
{
"created": "Tue, 18 May 1999 17:08:59 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Brady",
"Patrick",
""
],
[
"Chambers",
"Chris",
""
],
[
"Laarakkers",
"William",
""
],
[
"Poisson",
"Eric",
""
]
] | We consider the time evolution of a scalar field propagating in Schwarzschild-de Sitter spacetime. At early times, the field behaves as if it were in pure Schwarzschild spacetime; the structure of spacetime far from the black hole has no influence on the evolution. In this early epoch, the field's initial outburst is f... |
2011.06426 | Leonardo Chataignier | Leonardo Chataignier, Manuel Kraemer | Unitarity of quantum-gravitational corrections to primordial
fluctuations in the Born-Oppenheimer approach | 23 pages, clarifications and references added, published in Physical
Review D | Phys. Rev. D 103, 066005 (2021) | 10.1103/PhysRevD.103.066005 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the calculation of quantum-gravitational corrections to the power
spectra of scalar and tensor perturbations in the Born-Oppenheimer approach to
quantum gravity. We focus on the issue of the definition of the inner product
of the theory and the unitarity of the corrections to the dynamics of the
cosmologic... | [
{
"created": "Thu, 12 Nov 2020 15:00:04 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Mar 2021 21:37:27 GMT",
"version": "v2"
}
] | 2021-03-04 | [
[
"Chataignier",
"Leonardo",
""
],
[
"Kraemer",
"Manuel",
""
]
] | We revisit the calculation of quantum-gravitational corrections to the power spectra of scalar and tensor perturbations in the Born-Oppenheimer approach to quantum gravity. We focus on the issue of the definition of the inner product of the theory and the unitarity of the corrections to the dynamics of the cosmological... |
2006.02888 | Truong Xuan Pham | Pham Truong Xuan | Conformal scattering theories for tensorial wave equations on
Schwarzschild spacetime | 48 pages, 5 figures | Classical and Quantum Gravity, 2023 | 10.1088/1361-6382/ad079d | null | gr-qc math-ph math.AP math.MP | http://creativecommons.org/licenses/by/4.0/ | In this paper, we establish the constructions of conformal scattering
theories for the tensorial wave equation such as the tensorial Fackerell-Ipser
and the spin $\pm 1$ Teukolsky equations on Schwarzschild spacetime. In our
strategy, we construct the conformal scattering for the tensorial
Fackerell-Ipser equations w... | [
{
"created": "Wed, 3 Jun 2020 08:44:01 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Nov 2020 01:47:08 GMT",
"version": "v2"
},
{
"created": "Tue, 31 May 2022 05:28:48 GMT",
"version": "v3"
},
{
"created": "Thu, 7 Sep 2023 00:49:48 GMT",
"version": "v4"
}
] | 2023-11-07 | [
[
"Xuan",
"Pham Truong",
""
]
] | In this paper, we establish the constructions of conformal scattering theories for the tensorial wave equation such as the tensorial Fackerell-Ipser and the spin $\pm 1$ Teukolsky equations on Schwarzschild spacetime. In our strategy, we construct the conformal scattering for the tensorial Fackerell-Ipser equations whi... |
gr-qc/0306069 | R. A. W. Gregory | Christos Charmousis and Ruth Gregory | Axisymmetric metrics in arbitrary dimensions | 36 pages, LaTeX (JHEP), 4 figures, section added (published version) | Class.Quant.Grav. 21 (2004) 527-554 | 10.1088/0264-9381/21/2/016 | LPT-ORSAY/0341, DCPT-03/68, IPPP-03/34 | gr-qc hep-th | null | We consider axially symmetric static metrics in arbitrary dimension, both
with and without a cosmological constant. The most obvious such solutions have
an SO(n) group of Killing vectors representing the axial symmetry, although one
can also consider abelian groups which represent a flat `internal space'. We
relate s... | [
{
"created": "Mon, 16 Jun 2003 16:48:11 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jul 2003 14:21:00 GMT",
"version": "v2"
},
{
"created": "Sat, 10 Jul 2004 13:54:54 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Charmousis",
"Christos",
""
],
[
"Gregory",
"Ruth",
""
]
] | We consider axially symmetric static metrics in arbitrary dimension, both with and without a cosmological constant. The most obvious such solutions have an SO(n) group of Killing vectors representing the axial symmetry, although one can also consider abelian groups which represent a flat `internal space'. We relate suc... |
1404.0791 | Tharanath R | R. Tharanath, Nijo Varghese and V C Kuriakose | Phase transition, Quasinormal modes and Hawking radiation of
Schwarzschild black hole in Quintessence field | 14 pages, 6 figures, Accepted in Modern Physics Letters A. arXiv
admin note: text overlap with arXiv:gr-qc/0611146 by other authors | null | 10.1142/S0217732314500576 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Black hole thermodynamic stability can be determined by studying the nature
of heat capacity of the system. For Schwarzschild black hole the heat capacity
is negative, but in the quintessence field this system shows a second order
phase transition, implying the existence of a stable phase. We further discuss
the equa... | [
{
"created": "Thu, 3 Apr 2014 07:46:13 GMT",
"version": "v1"
}
] | 2014-04-04 | [
[
"Tharanath",
"R.",
""
],
[
"Varghese",
"Nijo",
""
],
[
"Kuriakose",
"V C",
""
]
] | Black hole thermodynamic stability can be determined by studying the nature of heat capacity of the system. For Schwarzschild black hole the heat capacity is negative, but in the quintessence field this system shows a second order phase transition, implying the existence of a stable phase. We further discuss the equati... |
2010.10292 | Hoang Nguyen | Hoang Ky Nguyen | Analyzing Pantheon SNeIa data in the context of Barrow's variable speed
of light | 18 pages, 12 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the Combined Pantheon Sample of Type Ia supernovae while allowing
the velocity of light to vary as a function of the scale factor $c\propto
a^{-\zeta}$, as initiated by Barrow [Phys. Rev. D 59, 043515 (1999)]. The
variation in the velocity of light creates an effect akin to the refraction
phenomenon which ... | [
{
"created": "Tue, 20 Oct 2020 16:06:17 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Apr 2024 16:11:21 GMT",
"version": "v2"
}
] | 2024-04-05 | [
[
"Nguyen",
"Hoang Ky",
""
]
] | We analyze the Combined Pantheon Sample of Type Ia supernovae while allowing the velocity of light to vary as a function of the scale factor $c\propto a^{-\zeta}$, as initiated by Barrow [Phys. Rev. D 59, 043515 (1999)]. The variation in the velocity of light creates an effect akin to the refraction phenomenon which oc... |
gr-qc/9511001 | Edgardo Salomon Cheb Terrab | E.S. Cheb-Terrab, K. von Bulow (Symb. Comp. Group, DFT-UERJ, Brazil) | Analytical Solving of Partial Differential Equations using Symbolic
Computing | 6 pages, LaTeX, to be published in the Proceedings of "Computing in
High Energy Physics" (CHEP-1995), World Scientific Publishing Co.
Soft-package: file pdetools, available at ftp://152.92.4.69/pdetools/ | null | 10.1142/9789814447188_0149 | IF-UERJ-95-20 | gr-qc funct-an hep-th math.FA | null | This work presents a brief discussion and a plan towards the analytical
solving of Partial Differential Equations (PDEs) using symbolic computing, as
well as an implementation of part of this plan as the PDEtools software-package
of commands.
| [
{
"created": "Wed, 1 Nov 1995 03:32:29 GMT",
"version": "v1"
}
] | 2016-03-23 | [
[
"Cheb-Terrab",
"E. S.",
"",
"Symb. Comp. Group, DFT-UERJ, Brazil"
],
[
"von Bulow",
"K.",
"",
"Symb. Comp. Group, DFT-UERJ, Brazil"
]
] | This work presents a brief discussion and a plan towards the analytical solving of Partial Differential Equations (PDEs) using symbolic computing, as well as an implementation of part of this plan as the PDEtools software-package of commands. |
gr-qc/9909019 | Garcia | L.C.Garcia de Andrade | Riemannian 2-D conical geometry of Heisenberg ferromagnets | Latex file 13 Kb | null | null | null | gr-qc | null | An exact 2-dimensional conical Riemannian defect solution of 3-dimensional
Euclidean Einstein equations of stresses and defects representing a shear-free
Heisenberg ferromagnet is given.The system is equivalent to the Einstein
equations in vacuum.Geodesics of magnetic monopoles around the ferromagnet are
also investi... | [
{
"created": "Mon, 6 Sep 1999 09:22:07 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Sep 1999 05:23:28 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | An exact 2-dimensional conical Riemannian defect solution of 3-dimensional Euclidean Einstein equations of stresses and defects representing a shear-free Heisenberg ferromagnet is given.The system is equivalent to the Einstein equations in vacuum.Geodesics of magnetic monopoles around the ferromagnet are also investiga... |
0805.3211 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev, Vladimir Folomeev, Ratbay Myrzakulov and
Douglas Singleton | Non-singular solutions to Einstein-Klein-Gordon equations with a phantom
scalar field | final version | JHEP 0807:094,2008 | 10.1088/1126-6708/2008/07/094 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the 4D Einstein-Klein-Gordon equations with a phantom scalar
field (a scalar field with a negative sign in front of the kinetic energy term
of its Lagrange density) has non-singular, spherically symmetry solutions.
These solutions have a combination of features found in other spherically
symmetric gr... | [
{
"created": "Wed, 21 May 2008 07:40:39 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jun 2008 11:40:32 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Aug 2008 06:47:56 GMT",
"version": "v3"
}
] | 2011-02-25 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Singleton",
"Douglas",
""
]
] | It is shown that the 4D Einstein-Klein-Gordon equations with a phantom scalar field (a scalar field with a negative sign in front of the kinetic energy term of its Lagrange density) has non-singular, spherically symmetry solutions. These solutions have a combination of features found in other spherically symmetric grav... |
2306.10117 | Zeeshan Gul | M. Sharif and M. Zeeshan Gul | Scalar Field Cosmology via Noether Symmetries in Energy-Momentum Squared
Gravity | 32 pages, 10 figures | Chin. J. Phys. 80 (2022)58 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article examines the analytic solutions of isotropic spacetime with the
minimal coupling of scalar field and matter in the context of energy-momentum
squared gravity. The scalar field includes quintessence and phantom dark energy
models. We evaluate solutions of a physical system through the Noether symmetry
app... | [
{
"created": "Fri, 16 Jun 2023 18:03:54 GMT",
"version": "v1"
}
] | 2023-06-21 | [
[
"Sharif",
"M.",
""
],
[
"Gul",
"M. Zeeshan",
""
]
] | This article examines the analytic solutions of isotropic spacetime with the minimal coupling of scalar field and matter in the context of energy-momentum squared gravity. The scalar field includes quintessence and phantom dark energy models. We evaluate solutions of a physical system through the Noether symmetry appro... |
2307.06257 | Daniel Su\'arez-Urango | Daniel Su\'arez-Urango, Laura M. Becerra, Justo Ospino, Luis A.
N\'u\~nez | The physical acceptability conditions and the strategies to obtain
anisotropic compact objects | 20 pages, 3 figures. Typo correction | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We studied five methods to include anisotropy, or unequal stress
distributions, in general relativistic matter configurations. We used nine
acceptability conditions that the metric and physical variables must meet to
determine if our models were astrophysically viable. Our analysis found the
most effective way to int... | [
{
"created": "Wed, 12 Jul 2023 15:52:05 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2023 20:59:11 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Sep 2023 13:43:14 GMT",
"version": "v3"
}
] | 2023-09-25 | [
[
"Suárez-Urango",
"Daniel",
""
],
[
"Becerra",
"Laura M.",
""
],
[
"Ospino",
"Justo",
""
],
[
"Núñez",
"Luis A.",
""
]
] | We studied five methods to include anisotropy, or unequal stress distributions, in general relativistic matter configurations. We used nine acceptability conditions that the metric and physical variables must meet to determine if our models were astrophysically viable. Our analysis found the most effective way to intro... |
gr-qc/9909029 | Keith H. Lockitch | Keith H. Lockitch | Stability and rotational mixing of modes in Newtonian and relativistic
stars | 157 pages, 32 ps figures/tables. Ph.D. thesis, University of
Wisconsin - Milwaukee | null | null | WISC-MILW-99-TH-13 | gr-qc astro-ph | null | Despite the recent excitement over the r-mode instability of rotating stars,
these modes are not yet well-understood for stellar models appropriate to
neutron stars - perfect fluid models in which both the equilibrium and
perturbed configurations obey the same one-parameter equation of state.
In spherical stars of ... | [
{
"created": "Wed, 8 Sep 1999 20:16:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lockitch",
"Keith H.",
""
]
] | Despite the recent excitement over the r-mode instability of rotating stars, these modes are not yet well-understood for stellar models appropriate to neutron stars - perfect fluid models in which both the equilibrium and perturbed configurations obey the same one-parameter equation of state. In spherical stars of this... |
1401.3496 | Saneesh Sebastian | Saneesh Sebastian and V. C. Kuriakose | Dirac Quasinormal modes of MSW black holes | 8 page, 3 figure, Appear in MPLA | Mod. Phys. Lett. A, Vol.29 No.5 (2014) 1450019 | 10.1142/S0217732314500199 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the Dirac quasinormal modes of an uncharged 2 + 1
black hole proposed by Mandal et. al and referred to as MSW black hole in this
work. The quasi- normal mode is studied using WKB approximation method. The
study shows that the imaginary part of quasinormal frequencies increases
indicating that t... | [
{
"created": "Wed, 15 Jan 2014 05:51:12 GMT",
"version": "v1"
}
] | 2014-02-19 | [
[
"Sebastian",
"Saneesh",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | In this paper we study the Dirac quasinormal modes of an uncharged 2 + 1 black hole proposed by Mandal et. al and referred to as MSW black hole in this work. The quasi- normal mode is studied using WKB approximation method. The study shows that the imaginary part of quasinormal frequencies increases indicating that the... |
2306.09387 | Aroonkumar Beesham | Bhupendra Kumar Shukla, Rishi KumarTiwari, Deger Sufuoglu and
Aroonkumar Beesham | Quintessences Universe in $f(R, L_m)$ gravity with special form of
deceleration parameter | 11 pages, 11 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper We have investigated a homogeneous and isotropic FRW
cosmological model with perfect fluid in the framework of $f(R,Lm)$ gravity. We
have explored for the non linear case of $f(R,L_m)$ model, namely $f(R,L_m) =
R/2 + L_m$ and obtained the solution by using the condition that the
deceleration parameter i... | [
{
"created": "Thu, 15 Jun 2023 15:13:45 GMT",
"version": "v1"
}
] | 2023-06-19 | [
[
"Shukla",
"Bhupendra Kumar",
""
],
[
"KumarTiwari",
"Rishi",
""
],
[
"Sufuoglu",
"Deger",
""
],
[
"Beesham",
"Aroonkumar",
""
]
] | In this paper We have investigated a homogeneous and isotropic FRW cosmological model with perfect fluid in the framework of $f(R,Lm)$ gravity. We have explored for the non linear case of $f(R,L_m)$ model, namely $f(R,L_m) = R/2 + L_m$ and obtained the solution by using the condition that the deceleration parameter is ... |
gr-qc/0303040 | Olivier Sarbach | Gioel Calabrese and Olivier Sarbach | Detecting ill posed boundary conditions in General Relativity | 10 pages, no figures. Revised version. Added more details on the
evolution of the constraint variables | J.Math.Phys. 44 (2003) 3888-3899 | 10.1063/1.1599056 | null | gr-qc | null | A persistent challenge in numerical relativity is the correct specification
of boundary conditions. In this work we consider a many parameter family of
symmetric hyperbolic initial-boundary value formulations for the linearized
Einstein equations and analyze its well posedness using the Laplace-Fourier
technique. By ... | [
{
"created": "Mon, 10 Mar 2003 15:44:22 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Apr 2003 15:59:03 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Calabrese",
"Gioel",
""
],
[
"Sarbach",
"Olivier",
""
]
] | A persistent challenge in numerical relativity is the correct specification of boundary conditions. In this work we consider a many parameter family of symmetric hyperbolic initial-boundary value formulations for the linearized Einstein equations and analyze its well posedness using the Laplace-Fourier technique. By us... |
gr-qc/0602038 | Muhammad Sharif | M. Sharif | The Structure of the Pseudo-Newtonian Force and Potential about a Five
Dimensional Rotating Black Hole | 10 pages, accepted for publication in Nuovo Cimento B, reference
added | Nuovo Cim. B121 (2006) 121-127 | 10.1393/ncb/i2005-10188-x | null | gr-qc | null | In this paper we investigate the structure of the pseudo-Newtonian force and
potential about a five dimensional rotating black hole. The conditions for the
force character from an attractive to repulsive are considered. It is also
found that the force will reach a maximum under certain conditions.
| [
{
"created": "Fri, 10 Feb 2006 10:07:12 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Feb 2006 09:14:51 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Sharif",
"M.",
""
]
] | In this paper we investigate the structure of the pseudo-Newtonian force and potential about a five dimensional rotating black hole. The conditions for the force character from an attractive to repulsive are considered. It is also found that the force will reach a maximum under certain conditions. |
gr-qc/0211070 | Chris Doran | Chris Doran and Anthony Lasenby | New Techniques for Analysing Axisymmetric Gravitational Systems. 1.
Vacuum Fields | 30 pages, no figures | Class.Quant.Grav. 20 (2003) 1077-1102 | 10.1088/0264-9381/20/6/304 | null | gr-qc astro-ph | null | A new framework for analysing the gravitational fields in a stationary,
axisymmetric configuration is introduced. The method is used to construct a
complete set of field equations for the vacuum region outside a rotating
source. These equations are under-determined. Restricting the Weyl tensor to
type D produces a se... | [
{
"created": "Thu, 21 Nov 2002 12:39:23 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Doran",
"Chris",
""
],
[
"Lasenby",
"Anthony",
""
]
] | A new framework for analysing the gravitational fields in a stationary, axisymmetric configuration is introduced. The method is used to construct a complete set of field equations for the vacuum region outside a rotating source. These equations are under-determined. Restricting the Weyl tensor to type D produces a set ... |
2101.04533 | Viktor Skoup\'y | Viktor Skoup\'y (1 and 2), Georgios Lukes-Gerakopoulos (2) ((1)
Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles
University, Prague, Czech Republic, (2) Astronomical Institute of the Czech
Academy of Sciences, Prague, Czech Republic) | Gravitational wave templates from Extreme Mass Ratio Inspirals | null | published in the proceedings of WDS 2020, pp. 52-58 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An extreme mass ratio inspiral takes place when a compact stellar object is
inspiraling into a supermassive black hole due to gravitational radiation
reaction. Gravitational waves (GWs) from this system can be calculated using
the Teukolsky equation (TE). In our case, we compute the asymptotic GW fluxes
of a spinning... | [
{
"created": "Tue, 12 Jan 2021 15:11:00 GMT",
"version": "v1"
}
] | 2021-01-14 | [
[
"Skoupý",
"Viktor",
"",
"1 and 2"
],
[
"Lukes-Gerakopoulos",
"Georgios",
""
]
] | An extreme mass ratio inspiral takes place when a compact stellar object is inspiraling into a supermassive black hole due to gravitational radiation reaction. Gravitational waves (GWs) from this system can be calculated using the Teukolsky equation (TE). In our case, we compute the asymptotic GW fluxes of a spinning b... |
gr-qc/0011114 | Gilles Esposito-Farese | G. Esposito-Farese | Tests of strong-field gravity and gravitational radiation damping in
binary-pulsar systems | 2 pages, "mprocl.sty" with LaTeX 2.09, uses "epsf.tex" to include 1
postscript figure; contribution to the 9th Marcel Grossmann Meeting (MG9),
Rome, July 2000 | Proceedings World Scientific (2002) p. 2041 | null | null | gr-qc astro-ph | null | This talk reviews the constraints imposed by binary-pulsar data on gravity
theories, and notably on "scalar-tensor" theories which are the most natural
alternatives to general relativity. Because neutron stars have a strong
gravitational binding energy, binary-pulsar tests are qualitatively different
from solar-syste... | [
{
"created": "Thu, 30 Nov 2000 18:23:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Esposito-Farese",
"G.",
""
]
] | This talk reviews the constraints imposed by binary-pulsar data on gravity theories, and notably on "scalar-tensor" theories which are the most natural alternatives to general relativity. Because neutron stars have a strong gravitational binding energy, binary-pulsar tests are qualitatively different from solar-system ... |
0812.0173 | Roland Steinbauer | Roland Steinbauer | A Note on Distributional Semi-Riemannian Geometry | 11 pages, Contribution presented at the 12th Serbian Mathematical
Congress, Novi Sad, September 2008 | Novi Sad J. Math. 38N3:189-199,2008 | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss some basic concepts of semi-Riemannian geometry in low-regularity
situations. In particular, we compare the settings of (linear) distributional
geometry in the sense of L. Schwartz and nonlinear distributional geometry in
the sense of J.F. Colombeau.
| [
{
"created": "Sun, 30 Nov 2008 21:16:17 GMT",
"version": "v1"
}
] | 2011-06-21 | [
[
"Steinbauer",
"Roland",
""
]
] | We discuss some basic concepts of semi-Riemannian geometry in low-regularity situations. In particular, we compare the settings of (linear) distributional geometry in the sense of L. Schwartz and nonlinear distributional geometry in the sense of J.F. Colombeau. |
2006.01105 | Emmanuil Saridakis | Emmanuel N. Saridakis | Modified cosmology through spacetime thermodynamics and Barrow horizon
entropy | 12 pages, 3 figures | null | 10.1088/1475-7516/2020/07/031 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present modified cosmological scenarios that arise from the application of
the "gravity-thermodynamics" conjecture, using the Barrow entropy instead of
the usual Bekenstein-Hawking one. The former is a modification of the black
hole entropy due to quantum-gravitational effects that deform the black-hole
horizon by... | [
{
"created": "Mon, 1 Jun 2020 17:44:03 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jun 2020 12:50:21 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"Saridakis",
"Emmanuel N.",
""
]
] | We present modified cosmological scenarios that arise from the application of the "gravity-thermodynamics" conjecture, using the Barrow entropy instead of the usual Bekenstein-Hawking one. The former is a modification of the black hole entropy due to quantum-gravitational effects that deform the black-hole horizon by g... |
2202.11509 | Kimet Jusufi | Javlon Rayimbaev, Bushra Majeed, Mubasher Jamil, Kimet Jusufi, Anzhong
Wang | Quasiperiodic Oscillations, Quasinormal Modes and Shadows of
Bardeen-Kiselev Black Holes | 18 pages, version published in Physics of the Dark Universe | Phys. Dark Univ. 35 (2022), 100930 | 10.1016/j.dark.2021.100930 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we study the particle dynamics around a static and
spherically symmetric Bardeen-Kiselev black hole (BK BH) which is a solution of
the Einstein-non-linear Maxwell field equations along with a quintessential
field. We discuss its essential geometrical properties such as scalar
invariants and size of i... | [
{
"created": "Tue, 22 Feb 2022 14:30:59 GMT",
"version": "v1"
}
] | 2022-02-24 | [
[
"Rayimbaev",
"Javlon",
""
],
[
"Majeed",
"Bushra",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Jusufi",
"Kimet",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this article, we study the particle dynamics around a static and spherically symmetric Bardeen-Kiselev black hole (BK BH) which is a solution of the Einstein-non-linear Maxwell field equations along with a quintessential field. We discuss its essential geometrical properties such as scalar invariants and size of inn... |
2107.02700 | Tong Jiang | Tong Jiang, Ning Dai, Yungui Gong, Dicong Liang, Chao Zhang | Constraint on Brans-Dicke theory from intermediate/extreme mass ratio
inspirals | Major revision by adding discussions on more mass ratios, but
conclusions are strengthened, matched to the published JCAP version | JCAP12(2022)023 | 10.1088/1475-7516/2022/12/023 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Intermediate/Extreme mass ratio inspiral (I/EMRI) system provides a good tool
to test the nature of gravity in strong field. Based on the method of
osculating orbits, we compute the orbital evolutions of I/EMRIs on
quasi-elliptic orbits in both Einstein's general relativity and Brans-Dicke
theory. The extra monopolar... | [
{
"created": "Tue, 6 Jul 2021 16:03:42 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jul 2021 14:50:50 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Dec 2022 05:04:02 GMT",
"version": "v3"
}
] | 2022-12-22 | [
[
"Jiang",
"Tong",
""
],
[
"Dai",
"Ning",
""
],
[
"Gong",
"Yungui",
""
],
[
"Liang",
"Dicong",
""
],
[
"Zhang",
"Chao",
""
]
] | Intermediate/Extreme mass ratio inspiral (I/EMRI) system provides a good tool to test the nature of gravity in strong field. Based on the method of osculating orbits, we compute the orbital evolutions of I/EMRIs on quasi-elliptic orbits in both Einstein's general relativity and Brans-Dicke theory. The extra monopolar a... |
2308.06505 | Tanisha Joshi | Tanisha Joshi | Unified Lagrangian for Tachyon, Quintessence, and Phantom Scalar Fields | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents a novel unified Lagrangian density that combines the
behaviors of tachyon, quintessence, and phantom scalar fields within the realms
of theoretical physics and cosmology. The unified Lagrangian is formulated,
where \(f(\alpha)\) is a function that accommodates different scenarios and
captures the ... | [
{
"created": "Sat, 12 Aug 2023 08:46:49 GMT",
"version": "v1"
}
] | 2023-08-15 | [
[
"Joshi",
"Tanisha",
""
]
] | This paper presents a novel unified Lagrangian density that combines the behaviors of tachyon, quintessence, and phantom scalar fields within the realms of theoretical physics and cosmology. The unified Lagrangian is formulated, where \(f(\alpha)\) is a function that accommodates different scenarios and captures the di... |
1509.00862 | Michael Boyle | Michael Boyle | Transformations of asymptotic gravitational-wave data | Added discussion of effects for gravitational-wave detection, and
some more intuitive explanations. Final version accepted for publication | Phys. Rev. D 93, 084031 (2016) | 10.1103/PhysRevD.93.084031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave data is gauge dependent. While we can restrict the class
of gauges in which such data may be expressed, there will still be an
infinite-dimensional group of transformations allowed while remaining in this
class, and almost as many different---though physically equivalent---waveforms
as there are tr... | [
{
"created": "Wed, 2 Sep 2015 20:08:40 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Sep 2015 02:04:42 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Mar 2016 14:59:10 GMT",
"version": "v3"
}
] | 2016-04-27 | [
[
"Boyle",
"Michael",
""
]
] | Gravitational-wave data is gauge dependent. While we can restrict the class of gauges in which such data may be expressed, there will still be an infinite-dimensional group of transformations allowed while remaining in this class, and almost as many different---though physically equivalent---waveforms as there are tran... |
gr-qc/0112052 | Irina Dymnikowa | Irina Dymnikova | Cosmological term as a source of mass | 8 pages, revtex, 8 figures incorporated, to appear in Classical and
Quantum Gravity | Class.Quant.Grav. 19 (2002) 725-740 | 10.1088/0264-9381/19/4/306 | null | gr-qc | null | In the spherically symmetric case the dominant energy condition together with
the requirements of regularity at the center, asymptotic flatness and
fineteness of the ADM mass, defines the family of asymptotically flat globally
regular solutions to the Einstein minimally coupled equations which includes
the class of m... | [
{
"created": "Thu, 20 Dec 2001 10:41:11 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Dymnikova",
"Irina",
""
]
] | In the spherically symmetric case the dominant energy condition together with the requirements of regularity at the center, asymptotic flatness and fineteness of the ADM mass, defines the family of asymptotically flat globally regular solutions to the Einstein minimally coupled equations which includes the class of met... |
1212.4473 | Marc Geiller | Ernesto Frodden, Marc Geiller, Karim Noui, Alejandro Perez | Statistical Entropy of a BTZ Black Hole from Loop Quantum Gravity | 14 pages. 1 figure. Paragraph added on page 7 to clarify the horizon
condition | JHEP 05 (2013) 139 | 10.1007/JHEP05(2013)139 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the statistical entropy of a BTZ black hole in the context of
three-dimensional Euclidean loop quantum gravity with a cosmological constant
$\Lambda$. As in the four-dimensional case, a quantum state of the black hole
is characterized by a spin network state. Now however, the underlying colored
graph $\Gam... | [
{
"created": "Tue, 18 Dec 2012 19:59:54 GMT",
"version": "v1"
},
{
"created": "Tue, 28 May 2013 17:27:45 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Frodden",
"Ernesto",
""
],
[
"Geiller",
"Marc",
""
],
[
"Noui",
"Karim",
""
],
[
"Perez",
"Alejandro",
""
]
] | We compute the statistical entropy of a BTZ black hole in the context of three-dimensional Euclidean loop quantum gravity with a cosmological constant $\Lambda$. As in the four-dimensional case, a quantum state of the black hole is characterized by a spin network state. Now however, the underlying colored graph $\Gamma... |
gr-qc/9810004 | Alicia M. Sintes | Alicia M. Sintes and Bernard F. Schutz | Coherent Line Removal: Filtering out harmonically related line
interference from experimental data, with application to gravitational wave
detectors | 14 pages, 8 figures, Revtex, psfig. To appear in Phys. Rev. D | Phys.Rev.D58:122003,1998 | 10.1103/PhysRevD.58.122003 | null | gr-qc | null | We describe a new technique for removing troublesome interference from
external coherent signals present in the gravitational wave spectrum. The
method works when the interference is present in many harmonics, as long as
they remain coherent with one another. The method can remove interference even
when the frequency... | [
{
"created": "Thu, 1 Oct 1998 16:18:38 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Sintes",
"Alicia M.",
""
],
[
"Schutz",
"Bernard F.",
""
]
] | We describe a new technique for removing troublesome interference from external coherent signals present in the gravitational wave spectrum. The method works when the interference is present in many harmonics, as long as they remain coherent with one another. The method can remove interference even when the frequency c... |
gr-qc/0505127 | David Solano | David Solano and Rodrigo Alvarado | Plane 5D worlds and simple compactification | 7 pages, 1 figure. 2nd version. Corrected some typos | Adv. Studies Theor. Phys., Vol. 5, 2011, no. 16, 791 - 799 | null | null | gr-qc | null | We obtain a new kind of exact solution to vaccum Einstein field equations
that contain both Minkowsian world and a special 5D curved spacetime with
particularly free structure. This special world is defined by an arbitrary
function and a space of three parameters. We suggest that this solution could
correct (in princ... | [
{
"created": "Wed, 25 May 2005 21:50:40 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Sep 2005 19:16:51 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Sep 2005 20:12:11 GMT",
"version": "v3"
}
] | 2011-10-19 | [
[
"Solano",
"David",
""
],
[
"Alvarado",
"Rodrigo",
""
]
] | We obtain a new kind of exact solution to vaccum Einstein field equations that contain both Minkowsian world and a special 5D curved spacetime with particularly free structure. This special world is defined by an arbitrary function and a space of three parameters. We suggest that this solution could correct (in princip... |
gr-qc/9903100 | Pablo Laguna | G.D. Allen, N. Andersson, K.D. Kokkotas, P. Laguna, J.A. Pullin and J.
Ruoff | The close-limit approximation to Neutron Star Collisions | 13 pages, 3 figures | Phys. Rev. D 60, 104021 (1999) | 10.1103/PhysRevD.60.104021 | null | gr-qc astro-ph | null | We develop a close-limit approximation to the head-on collision of two
neutron stars similar to that used to treat the merger of black hole binaries .
This approximation can serve as a useful benchmark test for future fully
nonlinear studies. For neutron star binaries, the close-limit approximation
involves assuming ... | [
{
"created": "Mon, 29 Mar 1999 17:38:38 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Allen",
"G. D.",
""
],
[
"Andersson",
"N.",
""
],
[
"Kokkotas",
"K. D.",
""
],
[
"Laguna",
"P.",
""
],
[
"Pullin",
"J. A.",
""
],
[
"Ruoff",
"J.",
""
]
] | We develop a close-limit approximation to the head-on collision of two neutron stars similar to that used to treat the merger of black hole binaries . This approximation can serve as a useful benchmark test for future fully nonlinear studies. For neutron star binaries, the close-limit approximation involves assuming th... |
1411.4997 | Nafiseh Rahmanpour | Nafiseh Rahmanpour and Hossein Shojaie | A Conformally Invariant Theory of Gravitation in Metric Measure Space | 11 pages | General Relativity and Gravitation, 47:123 (2015) | 10.1007/s10714-015-1962-9 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript, a conformally invariant theory of gravitation in the
context of metric measure space is studied. The proposed action is invariant
under both diffeomorphism and conformal transformations. Using the variational
method, a generalization of the Einstein equation is obtained, wherein the
conventional t... | [
{
"created": "Tue, 18 Nov 2014 20:18:53 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Nov 2014 17:43:49 GMT",
"version": "v2"
},
{
"created": "Sat, 3 Oct 2015 06:38:12 GMT",
"version": "v3"
}
] | 2015-10-06 | [
[
"Rahmanpour",
"Nafiseh",
""
],
[
"Shojaie",
"Hossein",
""
]
] | In this manuscript, a conformally invariant theory of gravitation in the context of metric measure space is studied. The proposed action is invariant under both diffeomorphism and conformal transformations. Using the variational method, a generalization of the Einstein equation is obtained, wherein the conventional ten... |
1901.09787 | Sergio Bravo Medina | Sergio Bravo Medina, Marek Nowakowski, Davide Batic | Viscous Cosmologies | 49 pages, 18 figures | null | 10.1088/1361-6382/ab45bb | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We probe into universes filled with Quark Gluon Plasma with non-zero
viscosities. In particular, we study the evolution of a universe with non-zero
shear viscosity motivated by the theoretical result of a non-vanishing shear
viscosity in the Quark Gluon Plasma due to quantum-mechanical effects. We first
review the co... | [
{
"created": "Mon, 28 Jan 2019 16:35:09 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Oct 2019 18:37:41 GMT",
"version": "v2"
}
] | 2019-10-03 | [
[
"Medina",
"Sergio Bravo",
""
],
[
"Nowakowski",
"Marek",
""
],
[
"Batic",
"Davide",
""
]
] | We probe into universes filled with Quark Gluon Plasma with non-zero viscosities. In particular, we study the evolution of a universe with non-zero shear viscosity motivated by the theoretical result of a non-vanishing shear viscosity in the Quark Gluon Plasma due to quantum-mechanical effects. We first review the cons... |
gr-qc/0405046 | Andre Gsponer | Andre Gsponer | On the physical interpretation of singularities in Lanczos-Newman
electrodynamics | 22 pages. Final version | null | null | ISRI-04-04 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the physical nature of elementary singularities arising in the
complexified Maxwell field extended into complex spacetime, i.e., in
Lanczos-Newman electrodynamics, which may provide a possible link between
elementary particle physics and general relativity theory. We show that the
translation of the world-... | [
{
"created": "Sun, 9 May 2004 20:49:30 GMT",
"version": "v1"
},
{
"created": "Wed, 19 May 2004 21:24:02 GMT",
"version": "v2"
},
{
"created": "Sun, 5 Oct 2008 19:10:00 GMT",
"version": "v3"
},
{
"created": "Sun, 9 Nov 2008 12:24:02 GMT",
"version": "v4"
}
] | 2008-11-09 | [
[
"Gsponer",
"Andre",
""
]
] | We discuss the physical nature of elementary singularities arising in the complexified Maxwell field extended into complex spacetime, i.e., in Lanczos-Newman electrodynamics, which may provide a possible link between elementary particle physics and general relativity theory. We show that the translation of the world-li... |
1106.5709 | Vladimir O. Soloviev | V.O. Soloviev, M.V. Tchichikina | Ultralocal energy density in massive gravity | 17 pages, no figures, LaTeX | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a space-time covariant Hamiltonian treatment for a finite-range
gravitational theory. The Kuchar approach is used to demonstrate the bimetric
picture of space-time in its most transparent form. This Hamiltonian formalism
is applied for the straightforward realization of the Poincar\'e algebra in
Dirac brac... | [
{
"created": "Tue, 28 Jun 2011 15:39:09 GMT",
"version": "v1"
}
] | 2011-06-29 | [
[
"Soloviev",
"V. O.",
""
],
[
"Tchichikina",
"M. V.",
""
]
] | We provide a space-time covariant Hamiltonian treatment for a finite-range gravitational theory. The Kuchar approach is used to demonstrate the bimetric picture of space-time in its most transparent form. This Hamiltonian formalism is applied for the straightforward realization of the Poincar\'e algebra in Dirac bracke... |
2208.09842 | Phongpichit Channuie | Jureeporn Yuennan (Nakhon Si Thammarat Rajabhat U.), Phongpichit
Channuie (Walailak U.) | Composite Inflation and further refining dS swampland conjecture | v1: 19 pages, no figure. arXiv admin note: text overlap with
arXiv:1303.3787 by other authors | Nuclear Physics B (2022) 116033 | 10.1016/j.nuclphysb.2022.116033 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A natural combination of the first and second derivatives of the scalar
potential was achieved in a framework of an alternative refined de Sitter
conjecture recently proposed in the literature. In this work, we study various
inflation models in which the inflaton is a composite field emerging from
various strongly in... | [
{
"created": "Sun, 21 Aug 2022 08:33:17 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Yuennan",
"Jureeporn",
"",
"Nakhon Si Thammarat Rajabhat U."
],
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
]
] | A natural combination of the first and second derivatives of the scalar potential was achieved in a framework of an alternative refined de Sitter conjecture recently proposed in the literature. In this work, we study various inflation models in which the inflaton is a composite field emerging from various strongly inte... |
2012.07868 | Martin Pauly | Passant Ali, Astrid Eichhorn, Martin Pauly, Michael M. Scherer | Constraints on discrete global symmetries in quantum gravity | 27 pages, 10 figures. v2: matches published version | JHEP 05 (2021) 036 | 10.1007/JHEP05(2021)036 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The question whether global symmetries can be realized in
quantum-gravity-matter-systems has far-reaching phenomenological consequences.
Here, we collect evidence that within an asymptotically safe context, discrete
global symmetries of the form $\mathbb{Z}_n$, $n>4$, cannot be realized in a
near-perturbative regime.... | [
{
"created": "Mon, 14 Dec 2020 19:00:06 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Sep 2021 14:35:46 GMT",
"version": "v2"
}
] | 2021-09-06 | [
[
"Ali",
"Passant",
""
],
[
"Eichhorn",
"Astrid",
""
],
[
"Pauly",
"Martin",
""
],
[
"Scherer",
"Michael M.",
""
]
] | The question whether global symmetries can be realized in quantum-gravity-matter-systems has far-reaching phenomenological consequences. Here, we collect evidence that within an asymptotically safe context, discrete global symmetries of the form $\mathbb{Z}_n$, $n>4$, cannot be realized in a near-perturbative regime. I... |
gr-qc/0103079 | Kirill Bronnikov | K.A. Bronnikov and V.N. Melnikov | On Observational Predictions from Multidimensional Gravity | 16 pages, Latex2e | Gen.Rel.Grav. 33 (2001) 1549-1578 | 10.1023/A:1012245011428 | null | gr-qc | null | We discuss possible observational manifestations of static, spherically
symmetric solutions of a class of multidimensional theories of gravity, which
includes the low energy limits of supergravities and superstring theories as
special cases. We discuss the choice of a physical conformal frame to be used
for the descr... | [
{
"created": "Thu, 22 Mar 2001 10:10:48 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | We discuss possible observational manifestations of static, spherically symmetric solutions of a class of multidimensional theories of gravity, which includes the low energy limits of supergravities and superstring theories as special cases. We discuss the choice of a physical conformal frame to be used for the descrip... |
1310.6095 | Gabriel Herczeg | Henrique Gomes, Gabriel Herczeg | A Rotating Black Hole Solution for Shape Dynamics | 13 pages | Class. Quantum Grav. 31 175014, 2014 | 10.1088/0264-9381/31/17/175014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Shape dynamics is a classical theory of gravity which agrees with general
relativity in many important aspects, but which possesses different gauge
symmetries and can present some fundamental global differences with respect to
Einstein spacetimes. Here, we present a general procedure for (locally) mapping
stationary,... | [
{
"created": "Wed, 23 Oct 2013 02:35:08 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Nov 2013 19:54:48 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Jun 2014 00:55:59 GMT",
"version": "v3"
},
{
"created": "Tue, 17 Jun 2014 19:37:53 GMT",
"version": "v4"
}
] | 2014-10-07 | [
[
"Gomes",
"Henrique",
""
],
[
"Herczeg",
"Gabriel",
""
]
] | Shape dynamics is a classical theory of gravity which agrees with general relativity in many important aspects, but which possesses different gauge symmetries and can present some fundamental global differences with respect to Einstein spacetimes. Here, we present a general procedure for (locally) mapping stationary, a... |
1703.09997 | Ramon Torres | Ramon Torres | Non-Singular Black Holes, the Cosmological Constant and Asymptotic
Safety | 24 pages, 7 figures | Phys. Rev. D 95, 124004 (2017) | 10.1103/PhysRevD.95.124004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravitational effects in black hole spacetimes with a cosmological
constant $\Lambda$ are considered. The effective quantum spacetimes for the
black holes are constructed by taking into account the renormalization group
improvement of classical solutions obtained in the framework of Unimodular
Gravity (a theo... | [
{
"created": "Wed, 29 Mar 2017 12:17:57 GMT",
"version": "v1"
}
] | 2017-06-14 | [
[
"Torres",
"Ramon",
""
]
] | Quantum gravitational effects in black hole spacetimes with a cosmological constant $\Lambda$ are considered. The effective quantum spacetimes for the black holes are constructed by taking into account the renormalization group improvement of classical solutions obtained in the framework of Unimodular Gravity (a theory... |
1412.6819 | Hosein Gholizade | H.Gholizade, A. Altaibayeva, R. Myrzakulov | Thermodynamics and geometry of strange quark matter | null | null | 10.1007/s10773-014-2417-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study thermodynamic of strange quark matter (SQM) using the analytic
expressions of free and internal energies. We investigate two regimes of the
high density and low density separately. As a vital program, in the case of a
massless gluon and massless quarks at finite temperature, we also present a
geometry of the... | [
{
"created": "Sun, 21 Dec 2014 18:47:09 GMT",
"version": "v1"
}
] | 2014-12-23 | [
[
"Gholizade",
"H.",
""
],
[
"Altaibayeva",
"A.",
""
],
[
"Myrzakulov",
"R.",
""
]
] | We study thermodynamic of strange quark matter (SQM) using the analytic expressions of free and internal energies. We investigate two regimes of the high density and low density separately. As a vital program, in the case of a massless gluon and massless quarks at finite temperature, we also present a geometry of therm... |
1011.0185 | J. A. R. Cembranos | Jose A. R. Cembranos | R^2 Dark Matter | 6 pages, 1 figure, to appear in the Proceedings of the sixth
International Workshop on the Dark Side of the Universe (DSU2010) Leon,
Guanajuato, Mexico 1-6 June 2010 | J.Phys.Conf.Ser.315:012004,2011 | 10.1088/1742-6596/315/1/012004 | FTPI-MINN-10/23, UMN-TH-2915/10 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a non-trivial four-derivative extension of the gravitational
spectrum that is free of ghosts and phenomenologically viable. It is the so
called $R^2$-gravity since it is defined by the only addition of a term
proportional to the square of the scalar curvature. Just the presence of this
term does not improve ... | [
{
"created": "Sun, 31 Oct 2010 17:56:56 GMT",
"version": "v1"
}
] | 2011-08-25 | [
[
"Cembranos",
"Jose A. R.",
""
]
] | There is a non-trivial four-derivative extension of the gravitational spectrum that is free of ghosts and phenomenologically viable. It is the so called $R^2$-gravity since it is defined by the only addition of a term proportional to the square of the scalar curvature. Just the presence of this term does not improve th... |
2112.09586 | Laura Sagunski | Niklas Becker, Laura Sagunski, Lukas Prinz, Saeed Rastgoo | Circularization vs. Eccentrification in Intermediate Mass Ratio
Inspirals inside Dark Matter Spikes | 16 pages, 10 figures. Code available online at
https://github.com/DMGW-Goethe/imripy. Text matches published version, eqn.
(27a)-(27d) updated | null | 10.1103/PhysRevD.105.063029 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | Inspirals of an Intermediate Mass Black Hole (IMBH) and a solar mass type
object will be observable by space based gravitational wave detectors such as
The Laser Interferometer Space Antenna (LISA). A dark matter overdensity around
an IMBH - a dark matter spike - can affect the orbital evolution of the system.
We con... | [
{
"created": "Fri, 17 Dec 2021 15:59:21 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Apr 2022 13:41:47 GMT",
"version": "v2"
}
] | 2022-04-28 | [
[
"Becker",
"Niklas",
""
],
[
"Sagunski",
"Laura",
""
],
[
"Prinz",
"Lukas",
""
],
[
"Rastgoo",
"Saeed",
""
]
] | Inspirals of an Intermediate Mass Black Hole (IMBH) and a solar mass type object will be observable by space based gravitational wave detectors such as The Laser Interferometer Space Antenna (LISA). A dark matter overdensity around an IMBH - a dark matter spike - can affect the orbital evolution of the system. We consi... |
1710.09669 | Marcus Khuri | Marcus Khuri, Eric Woolgar | Nonexistence of Degenerate Horizons in Static Vacua and Black Hole
Uniqueness | 8 pages; minor improvements | Phys. Lett. B, 777 (2018), 235-239 | 10.1016/j.physletb.2017.12.044 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that in any spacetime dimension $D\ge 4$, degenerate components of
the event horizon do not exist in static vacuum configurations with positive
cosmological constant. We also show that without a cosmological constant
asymptotically flat solutions cannot possess a degenerate horizon component.
Several independ... | [
{
"created": "Thu, 26 Oct 2017 12:53:56 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Oct 2017 23:12:38 GMT",
"version": "v2"
}
] | 2018-01-17 | [
[
"Khuri",
"Marcus",
""
],
[
"Woolgar",
"Eric",
""
]
] | We show that in any spacetime dimension $D\ge 4$, degenerate components of the event horizon do not exist in static vacuum configurations with positive cosmological constant. We also show that without a cosmological constant asymptotically flat solutions cannot possess a degenerate horizon component. Several independen... |
0802.1032 | Saibal Ray | Utpal Mukhopadhyay, P. C. Ray, Saibal Ray and S. B. Datta Choudhury | Generalized Model for $\Lambda$-Dark Energy | 8 Latex pages | Int.J.Mod.Phys.D18:389-396,2009 | 10.1142/S021827180901456X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein field equations under spherically symmetric space-times are
considered here in connection to dark energy investigation. A set of solutions
are obtained for a kinematical $\Lambda$ model, viz., $\Lambda \sim (\dot
a/a)^2$ without assuming any {\it a priori} value for the curvature constant
and the equation of... | [
{
"created": "Thu, 7 Feb 2008 18:10:30 GMT",
"version": "v1"
}
] | 2009-05-12 | [
[
"Mukhopadhyay",
"Utpal",
""
],
[
"Ray",
"P. C.",
""
],
[
"Ray",
"Saibal",
""
],
[
"Choudhury",
"S. B. Datta",
""
]
] | Einstein field equations under spherically symmetric space-times are considered here in connection to dark energy investigation. A set of solutions are obtained for a kinematical $\Lambda$ model, viz., $\Lambda \sim (\dot a/a)^2$ without assuming any {\it a priori} value for the curvature constant and the equation of s... |
1311.7501 | Gerard Clement | G\'erard Cl\'ement | Bertotti-Robinson solutions in five--dimensional quadratic gravity | 16 pages. References added. Version to be published in Classical and
Quantum Gravity | Class. Quantum Grav. 31 (2014) 075001 | 10.1088/0264-9381/31/7/075001 | LAPTH-068/13 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct new solutions of five-dimensional quadratic gravity as direct
products of a constant curvature two-surface with a solution of
three-dimensional new massive gravity with constant scalar curvature. These
solutions could represent near-horizon limits of five-dimensional
asymptotically flat black strings or ... | [
{
"created": "Fri, 29 Nov 2013 09:49:58 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Feb 2014 09:35:11 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Clément",
"Gérard",
""
]
] | We construct new solutions of five-dimensional quadratic gravity as direct products of a constant curvature two-surface with a solution of three-dimensional new massive gravity with constant scalar curvature. These solutions could represent near-horizon limits of five-dimensional asymptotically flat black strings or bl... |
1302.0002 | Kei Yamada | Hiroki Okawara, Kei Yamada, Hideki Asada | Possible latitude effects of Chern-Simons gravity on quantum
interference | 18 pages, 5 figures, text improved with references added; accepted by
PRD. arXiv admin note: substantial text overlap with arXiv:1210.4628 | Phys.Rev.D87:084038,2013 | 10.1103/PhysRevD.87.084038 | null | gr-qc astro-ph.EP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been recently suggested that possible effects of Chern-Simons gravity
on a quantum interferometer are dependent on the latitude and direction of the
interferometer on Earth in orbital motion around Sun. Continuing work initiated
in the earlier publication [Okawara, Yamada and Asada, Phys. Rev. Lett. 109,
23110... | [
{
"created": "Thu, 31 Jan 2013 07:58:01 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Mar 2013 12:14:44 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Okawara",
"Hiroki",
""
],
[
"Yamada",
"Kei",
""
],
[
"Asada",
"Hideki",
""
]
] | It has been recently suggested that possible effects of Chern-Simons gravity on a quantum interferometer are dependent on the latitude and direction of the interferometer on Earth in orbital motion around Sun. Continuing work initiated in the earlier publication [Okawara, Yamada and Asada, Phys. Rev. Lett. 109, 231101 ... |
1105.4325 | Vladimir Popov | V. A. Popov | Statefinder analysis of the superfluid Chaplygin gas model | 18 pages, 6 figures | JCAP:10(2011)009 | 10.1088/1475-7516/2011/10/009 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The statefinder indices are employed to test the superfluid Chaplygin gas
(SCG) model describing the dark sector of the universe. The model involves
Bose-Einstein condensate (BEC) as dark energy (DE) and an excited state above
it as dark matter (DM). The condensate is assumed to have a negative pressure
and is embodi... | [
{
"created": "Sun, 22 May 2011 10:05:33 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Dec 2011 10:22:17 GMT",
"version": "v2"
}
] | 2011-12-06 | [
[
"Popov",
"V. A.",
""
]
] | The statefinder indices are employed to test the superfluid Chaplygin gas (SCG) model describing the dark sector of the universe. The model involves Bose-Einstein condensate (BEC) as dark energy (DE) and an excited state above it as dark matter (DM). The condensate is assumed to have a negative pressure and is embodied... |
gr-qc/0201077 | Daniele Oriti | Daniele Oriti | Boundary terms in the Barrett-Crane spin foam model and consistent
gluing | 10 pages, 2 figures, revtex; v2: typos in some formulas corrected,
version appeared in journal | Phys.Lett. B532 (2002) 363-372 | 10.1016/S0370-2693(02)01559-9 | DAMTP-2002-6 | gr-qc hep-th | null | We extend the lattice gauge theory-type derivation of the Barrett-Crane spin
foam model for quantum gravity to other choices of boundary conditions,
resulting in different boundary terms, and re-analyze the gluing of 4-simplices
in this context. This provides a consistency check of the previous derivation.
Moreover w... | [
{
"created": "Wed, 23 Jan 2002 18:50:16 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2002 10:33:50 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Oriti",
"Daniele",
""
]
] | We extend the lattice gauge theory-type derivation of the Barrett-Crane spin foam model for quantum gravity to other choices of boundary conditions, resulting in different boundary terms, and re-analyze the gluing of 4-simplices in this context. This provides a consistency check of the previous derivation. Moreover we ... |
1602.07900 | Olivier Piguet | Ivan Morales, Bruno Neves, Zui Oporto and Olivier Piguet | A Topological-like Model for Gravity in 4D Space-time | 24 pages, 2 figures, PDFLatex. Typos corrected. Subsection 2.2.1 is
new and subsection 2.2.3 (old subsection 2.2.2) has been improved | null | 10.1140/epjc/s10052-016-4045-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider a model for gravity in 4-dimensional space-time
originally proposed by Chamseddine, which may be derived by dimensional
reduction and truncation from a 5-dimensional Chern-Simons theory. Its
topological origin makes it an interesting candidate for an easier
quantization, e.g., in the Loop Qu... | [
{
"created": "Thu, 25 Feb 2016 12:19:48 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Mar 2016 20:50:20 GMT",
"version": "v2"
}
] | 2016-05-04 | [
[
"Morales",
"Ivan",
""
],
[
"Neves",
"Bruno",
""
],
[
"Oporto",
"Zui",
""
],
[
"Piguet",
"Olivier",
""
]
] | In this paper we consider a model for gravity in 4-dimensional space-time originally proposed by Chamseddine, which may be derived by dimensional reduction and truncation from a 5-dimensional Chern-Simons theory. Its topological origin makes it an interesting candidate for an easier quantization, e.g., in the Loop Quan... |
2005.14010 | Yurii Ignat'ev | Yu.G. Ignat'ev, D.Yu. Ignat'ev | A Complete Model of Cosmological Evolution of Scalar Field with Higgs
Potential and Euclidian Cycles | 10 pages, 10 references, 12 figures | Gravit. Cosmol. 26 (2020) 29 | 10.1134/S0202289320010065 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The revision of the Author's results with respect to possibility of existence
of the so-called Euclidian cycles in cosmological evolution of a system of
Higgs scalar fields has been performed. The assumption of non-negativity of the
Universe's extension velocity, which contradicts in certain cases to complete
system ... | [
{
"created": "Thu, 28 May 2020 13:56:49 GMT",
"version": "v1"
}
] | 2020-05-29 | [
[
"Ignat'ev",
"Yu. G.",
""
],
[
"Ignat'ev",
"D. Yu.",
""
]
] | The revision of the Author's results with respect to possibility of existence of the so-called Euclidian cycles in cosmological evolution of a system of Higgs scalar fields has been performed. The assumption of non-negativity of the Universe's extension velocity, which contradicts in certain cases to complete system of... |
1903.02288 | Sudipta Das | Sudipta Das, Manisha Banerjee, Nandan Roy | Dynamical System Analysis for Steep Potentials | 23 pages, 33 figures, Accepted for publication in JCAP | null | 10.1088/1475-7516/2019/08/024 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we have performed the dynamical system analysis for steep(er)
exponential potentials considering different values of the steepness index $n$.
We have performed the analysis using centre manifold theory as well as by
employing numerical method. We have shown that in most of the cases, the higher
values of... | [
{
"created": "Wed, 6 Mar 2019 10:20:24 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2019 13:38:38 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Das",
"Sudipta",
""
],
[
"Banerjee",
"Manisha",
""
],
[
"Roy",
"Nandan",
""
]
] | In this work we have performed the dynamical system analysis for steep(er) exponential potentials considering different values of the steepness index $n$. We have performed the analysis using centre manifold theory as well as by employing numerical method. We have shown that in most of the cases, the higher values of s... |
0711.2297 | Claudio Simeone | Martin Richarte and Claudio Simeone | Traversable wormholes in a string cloud | 21 pages, 10 figures; accepted for publication in Int. J. Mod. Phys.
D | Int.J.Mod.Phys.D17:1179-1196,2008 | 10.1142/S0218271808012759 | null | gr-qc astro-ph | null | We study spherically symmetric thin-shell wormholes in a string cloud
background in (3+1)-dimensional spacetime. The amount of exotic matter required
for the construction, the traversability and the stability under radial
perturbations, are analyzed as functions of the parameters of the model.
Besides, in the Appendi... | [
{
"created": "Wed, 14 Nov 2007 20:41:33 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Richarte",
"Martin",
""
],
[
"Simeone",
"Claudio",
""
]
] | We study spherically symmetric thin-shell wormholes in a string cloud background in (3+1)-dimensional spacetime. The amount of exotic matter required for the construction, the traversability and the stability under radial perturbations, are analyzed as functions of the parameters of the model. Besides, in the Appendice... |
1706.00995 | David McNutt | David D. McNutt | Curvature invariant characterization of event horizons of
four-dimensional black holes conformal to stationary black holes | 9 pages | Phys. Rev. D 96, 104022 (2017) | 10.1103/PhysRevD.96.104022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce three approaches to generate curvature invariants that transform
covariantly under a conformal transformation of a four dimensional spacetime.
For any black hole conformally related to a stationary black hole, we show how
a set of conformally covariant invariants can be combined to produce a
conformally ... | [
{
"created": "Sat, 3 Jun 2017 20:00:17 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jun 2017 18:20:06 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jun 2017 15:34:31 GMT",
"version": "v3"
},
{
"created": "Mon, 25 Sep 2017 16:14:14 GMT",
"version": "v4"
},
{
"cre... | 2017-11-22 | [
[
"McNutt",
"David D.",
""
]
] | We introduce three approaches to generate curvature invariants that transform covariantly under a conformal transformation of a four dimensional spacetime. For any black hole conformally related to a stationary black hole, we show how a set of conformally covariant invariants can be combined to produce a conformally co... |
1111.1903 | Robert C. Myers | Robert C. Myers | Myers-Perry black holes | 30 pages, 3 figures; Chapter of a book "Black Holes in Higher
Dimensions" to be published by Cambridge University Press (editor: G.
Horowitz) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the vacuum solutions of Einstein's equations in higher dimensions
known as Myers-Perry metrics. In many respects, these solutions describing
spinning black holes admit the same remarkable properties as the standard Kerr
black hole in four dimensions. However, studying these solutions also begins to
provide ... | [
{
"created": "Tue, 8 Nov 2011 13:31:43 GMT",
"version": "v1"
}
] | 2011-11-09 | [
[
"Myers",
"Robert C.",
""
]
] | We review the vacuum solutions of Einstein's equations in higher dimensions known as Myers-Perry metrics. In many respects, these solutions describing spinning black holes admit the same remarkable properties as the standard Kerr black hole in four dimensions. However, studying these solutions also begins to provide so... |
1502.06861 | Prabir Rudra | Prabir Rudra (Indian Instt. of Engg., Sci. and tech., Asutosh College) | Does f(R,T) gravity admit a stationary scenario between dark energy and
dark matter in its framework? | 10 pages, 3 figures, Accepted for publication in Eur. Phys. J. Plus.
arXiv admin note: substantial text overlap with arXiv:1411.3583,
arXiv:1410.6710 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note we address the well-known cosmic coincidence problem in the
framework of the \textit{f(R,T)} gravity. In order to achieve this, an
interaction between dark energy and dark matter is considered. A constraint
equation is obtained which filters the \textit{f(R,T)} models that produce a
stationary scenario b... | [
{
"created": "Tue, 24 Feb 2015 16:21:11 GMT",
"version": "v1"
}
] | 2015-02-25 | [
[
"Rudra",
"Prabir",
"",
"Indian Instt. of Engg., Sci. and tech., Asutosh College"
]
] | In this note we address the well-known cosmic coincidence problem in the framework of the \textit{f(R,T)} gravity. In order to achieve this, an interaction between dark energy and dark matter is considered. A constraint equation is obtained which filters the \textit{f(R,T)} models that produce a stationary scenario bet... |
2406.15878 | Davide Usseglio | Donato Bini, Andrea Geralico, Chris Kavanagh, Adam Pound, Davide
Usseglio | Post-Minkowskian self-force in the low-velocity limit: scalar field
scattering | 24 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present an approach to compute analytical post-Minkowskian
corrections to unbound two-body scattering in the self-force formalism. Our
method relies on a further low-velocity (post-Newtonian) expansion of the
motion. We present a general strategy valid for gravitational and
non-gravitational self-for... | [
{
"created": "Sat, 22 Jun 2024 15:52:17 GMT",
"version": "v1"
}
] | 2024-06-25 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Kavanagh",
"Chris",
""
],
[
"Pound",
"Adam",
""
],
[
"Usseglio",
"Davide",
""
]
] | In this paper we present an approach to compute analytical post-Minkowskian corrections to unbound two-body scattering in the self-force formalism. Our method relies on a further low-velocity (post-Newtonian) expansion of the motion. We present a general strategy valid for gravitational and non-gravitational self-force... |
1910.01651 | Marcus H\"og{\aa}s | Marcus H\"og{\aa}s, Francesco Torsello and Edvard M\"ortsell | On the stability of bimetric structure formation | 15 pages, 7 figures. v2 slight updates in accordance with the
published version | JCAP04(2020)046 | 10.1088/1475-7516/2020/04/046 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bimetric gravity can reproduce the accelerated expansion of the Universe,
without a cosmological constant. However, the stability of these solutions to
linear perturbations has been questioned, suggesting exponential growth of
structure in this approximation. We present a simple model of structure
formation, for whic... | [
{
"created": "Thu, 3 Oct 2019 18:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Apr 2020 12:54:51 GMT",
"version": "v2"
}
] | 2020-04-30 | [
[
"Högås",
"Marcus",
""
],
[
"Torsello",
"Francesco",
""
],
[
"Mörtsell",
"Edvard",
""
]
] | Bimetric gravity can reproduce the accelerated expansion of the Universe, without a cosmological constant. However, the stability of these solutions to linear perturbations has been questioned, suggesting exponential growth of structure in this approximation. We present a simple model of structure formation, for which ... |
0809.4170 | Parthasarathi Mitra | A. Ghosh and P. Mitra | Fine-grained state counting for black holes in loop quantum gravity | 5 pages, REVTeX; to appear in PRL | Phys.Rev.Lett.102:141302,2009 | 10.1103/PhysRevLett.102.141302 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A state of a black hole in loop quantum gravity is given by a distribution of
spins on punctures on the horizon. The distribution is of the Boltzmann type,
with the area playing the role of the energy. In investigations where the total
area was kept approximately constant, there was a kind of thermal equilibrium
betw... | [
{
"created": "Wed, 24 Sep 2008 11:59:18 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Feb 2009 11:56:20 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Mar 2009 11:05:40 GMT",
"version": "v3"
}
] | 2009-05-18 | [
[
"Ghosh",
"A.",
""
],
[
"Mitra",
"P.",
""
]
] | A state of a black hole in loop quantum gravity is given by a distribution of spins on punctures on the horizon. The distribution is of the Boltzmann type, with the area playing the role of the energy. In investigations where the total area was kept approximately constant, there was a kind of thermal equilibrium betwee... |
1002.0958 | Tekin Dereli | T. Dereli, N. Ozdemir, O. Sert | Einstein-Cartan-Dirac Theory in (1+2)-Dimensions | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein-Cartan theory is formulated in (1+2)-dimensions using the algebra of
exterior differential forms. A Dirac spinor is coupled to gravity and the field
equations are obtained by a variational principle. The space-time torsion is
found to be given algebraically in terms of the Dirac field. Circularly
symmetric, ... | [
{
"created": "Thu, 4 Feb 2010 10:37:32 GMT",
"version": "v1"
}
] | 2010-02-05 | [
[
"Dereli",
"T.",
""
],
[
"Ozdemir",
"N.",
""
],
[
"Sert",
"O.",
""
]
] | Einstein-Cartan theory is formulated in (1+2)-dimensions using the algebra of exterior differential forms. A Dirac spinor is coupled to gravity and the field equations are obtained by a variational principle. The space-time torsion is found to be given algebraically in terms of the Dirac field. Circularly symmetric, ex... |
0810.2549 | Salvatore Capozziello | S. Capozziello, R. Cianci, C. Stornaiolo, S. Vignolo | f(R) cosmology with torsion | 13 pages | Phys.Scripta 78:065010,2008 | 10.1088/0031-8949/78/06/065010 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | f(R)-gravity with geometric torsion (not related to any spin fluid) is
considered in a cosmological context. We derive the field equations in vacuum
and in presence of perfect-fluid matter and discuss the related cosmological
models. Torsion vanishes in vacuum for almost all arbitrary functions f(R)
leading to standa... | [
{
"created": "Tue, 14 Oct 2008 20:09:21 GMT",
"version": "v1"
}
] | 2009-01-21 | [
[
"Capozziello",
"S.",
""
],
[
"Cianci",
"R.",
""
],
[
"Stornaiolo",
"C.",
""
],
[
"Vignolo",
"S.",
""
]
] | f(R)-gravity with geometric torsion (not related to any spin fluid) is considered in a cosmological context. We derive the field equations in vacuum and in presence of perfect-fluid matter and discuss the related cosmological models. Torsion vanishes in vacuum for almost all arbitrary functions f(R) leading to standard... |
1601.04079 | Alex Va\~n\'o-Vi\~nuales | Alex Va\~n\'o-Vi\~nuales and Sascha Husa | Free hyperboloidal evolution in spherical symmetry | 6 pages, 4 figures, submitted as proceedings for the 14th Marcel
Grossmann meeting | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address the hyperboloidal initial value problem in the context of
Numerical Relativity, motivated by its evolution on hyperboloidal slices:
smooth spacelike slices that reach future null infinity, the "location" in
spacetime where radiation is to be extracted. Our approach uses the BSSN and Z4
formulations and a t... | [
{
"created": "Fri, 15 Jan 2016 21:20:47 GMT",
"version": "v1"
}
] | 2016-01-19 | [
[
"Vañó-Viñuales",
"Alex",
""
],
[
"Husa",
"Sascha",
""
]
] | We address the hyperboloidal initial value problem in the context of Numerical Relativity, motivated by its evolution on hyperboloidal slices: smooth spacelike slices that reach future null infinity, the "location" in spacetime where radiation is to be extracted. Our approach uses the BSSN and Z4 formulations and a tim... |
1105.1498 | Takashi Tamaki | Takashi Tamaki, Nobuyuki Sakai | Unified picture of Q-balls and boson stars via catastrophe theory | 10 pages, 13 figures | Phys.Rev.D81:124041,2010 | 10.1103/PhysRevD.81.124041 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We make an analysis of Q-balls and boson stars using catastrophe theory, as
an extension of the previous work on Q-balls in flat spacetime. We adopt the
potential $V_3(\phi)={m^2\over2}\phi^2-\mu\phi^3+\lambda\phi^4$ for Q-balls and
that with $\mu =0$ for boson stars. For solutions with $|g^{rr}-1|\sim 1$ at
its peak... | [
{
"created": "Sun, 8 May 2011 06:52:55 GMT",
"version": "v1"
}
] | 2011-05-12 | [
[
"Tamaki",
"Takashi",
""
],
[
"Sakai",
"Nobuyuki",
""
]
] | We make an analysis of Q-balls and boson stars using catastrophe theory, as an extension of the previous work on Q-balls in flat spacetime. We adopt the potential $V_3(\phi)={m^2\over2}\phi^2-\mu\phi^3+\lambda\phi^4$ for Q-balls and that with $\mu =0$ for boson stars. For solutions with $|g^{rr}-1|\sim 1$ at its peak, ... |
1207.5271 | Xinliang An | Xinliang An | Formation of Trapped Surfaces from Past Null Infinity | 125 pages, an updated version | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we extend the results of Klainerman and Rodnianski in
\cite{KR:Trapped}, which were obtained for a finite region, by showing similar
results from past null infinity. This allows us to recover and extend the
results from past null infinity in the work of Christodoulou \cite{Chr:book}.
| [
{
"created": "Mon, 23 Jul 2012 00:48:46 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Nov 2014 19:46:01 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Nov 2014 15:43:46 GMT",
"version": "v3"
}
] | 2014-11-06 | [
[
"An",
"Xinliang",
""
]
] | In this paper, we extend the results of Klainerman and Rodnianski in \cite{KR:Trapped}, which were obtained for a finite region, by showing similar results from past null infinity. This allows us to recover and extend the results from past null infinity in the work of Christodoulou \cite{Chr:book}. |
1604.08253 | Scott Field | Rory Smith, Scott E. Field, Kent Blackburn, Carl-Johan Haster, Michael
P\"urrer, Vivien Raymond, Patricia Schmidt | Fast and Accurate Inference on Gravitational Waves from Precessing
Compact Binaries | 19 pages, 12 figures. Minor edits based on referee report | Phys. Rev. D 94, 044031 (2016) | 10.1103/PhysRevD.94.044031 | LIGO P1600096 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inferring astrophysical information from gravitational waves emitted by
compact binaries is one of the key science goals of gravitational-wave
astronomy. In order to reach the full scientific potential of
gravitational-wave experiments we require techniques to mitigate the cost of
Bayesian inference, especially as gr... | [
{
"created": "Wed, 27 Apr 2016 21:45:38 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Aug 2016 15:48:48 GMT",
"version": "v2"
}
] | 2016-08-30 | [
[
"Smith",
"Rory",
""
],
[
"Field",
"Scott E.",
""
],
[
"Blackburn",
"Kent",
""
],
[
"Haster",
"Carl-Johan",
""
],
[
"Pürrer",
"Michael",
""
],
[
"Raymond",
"Vivien",
""
],
[
"Schmidt",
"Patricia",
""
]
] | Inferring astrophysical information from gravitational waves emitted by compact binaries is one of the key science goals of gravitational-wave astronomy. In order to reach the full scientific potential of gravitational-wave experiments we require techniques to mitigate the cost of Bayesian inference, especially as grav... |
1704.08874 | Alexey Golovnev | Alexey Golovnev, Fedor Smirnov | Unusual square roots in the ghost-free theory of massive gravity | 24 pages; minor changes, final version | Journal of High Energy Physics JHEP06(2017)130 | 10.1007/JHEP06(2017)130 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A crucial building block of the ghost free massive gravity is the square root
function of a matrix. This is a problematic entity from the viewpoint of
existence and uniqueness properties. We accurately describe the freedom of
choosing a square root of a (non-degenerate) matrix. It has discrete and (in
special cases) ... | [
{
"created": "Fri, 28 Apr 2017 11:06:33 GMT",
"version": "v1"
},
{
"created": "Fri, 5 May 2017 12:59:58 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Jun 2017 12:49:19 GMT",
"version": "v3"
}
] | 2023-01-11 | [
[
"Golovnev",
"Alexey",
""
],
[
"Smirnov",
"Fedor",
""
]
] | A crucial building block of the ghost free massive gravity is the square root function of a matrix. This is a problematic entity from the viewpoint of existence and uniqueness properties. We accurately describe the freedom of choosing a square root of a (non-degenerate) matrix. It has discrete and (in special cases) co... |
gr-qc/9711068 | Andrew Liddle | Edmund J Copeland, Andrew R Liddle and David Wands | Exponential potentials and cosmological scaling solutions | 6 pages RevTeX file with four figures incorporated (uses RevTeX and
epsf). Matches published version | Phys.Rev.D57:4686-4690,1998 | 10.1103/PhysRevD.57.4686 | SUSX-TH-97-022, SUSSEX-AST 97/11-1, PU-RCG/97-20 | gr-qc astro-ph hep-ph | null | We present a phase-plane analysis of cosmologies containing a barotropic
fluid with equation of state $p_\gamma = (\gamma-1) \rho_\gamma$, plus a scalar
field $\phi$ with an exponential potential $V \propto \exp(-\lambda \kappa
\phi)$ where $\kappa^2 = 8\pi G$. In addition to the well-known inflationary
solutions for... | [
{
"created": "Fri, 21 Nov 1997 16:13:48 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jul 1998 10:53:29 GMT",
"version": "v2"
}
] | 2011-05-05 | [
[
"Copeland",
"Edmund J",
""
],
[
"Liddle",
"Andrew R",
""
],
[
"Wands",
"David",
""
]
] | We present a phase-plane analysis of cosmologies containing a barotropic fluid with equation of state $p_\gamma = (\gamma-1) \rho_\gamma$, plus a scalar field $\phi$ with an exponential potential $V \propto \exp(-\lambda \kappa \phi)$ where $\kappa^2 = 8\pi G$. In addition to the well-known inflationary solutions for $... |
0801.1455 | J\"org Hennig | J\"org Hennig and Marcus Ansorg | A Fully Pseudospectral Scheme for Solving Singular Hyperbolic Equations | 24 pages, 12 figures | J.Hyperbol.Diff.Equat.6:161,2009 | 10.1142/S0219891609001769 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the example of the spherically symmetric scalar wave equation on
Minkowski space-time we demonstrate that a fully pseudospectral scheme (i.e.
spectral with respect to both spatial and time directions) can be applied for
solving hyperbolic equations. The calculations are carried out within the
framework of confor... | [
{
"created": "Wed, 9 Jan 2008 16:13:19 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Mar 2009 12:41:44 GMT",
"version": "v2"
}
] | 2010-11-05 | [
[
"Hennig",
"Jörg",
""
],
[
"Ansorg",
"Marcus",
""
]
] | With the example of the spherically symmetric scalar wave equation on Minkowski space-time we demonstrate that a fully pseudospectral scheme (i.e. spectral with respect to both spatial and time directions) can be applied for solving hyperbolic equations. The calculations are carried out within the framework of conforma... |
gr-qc/0503099 | David Wiltshire | David L. Wiltshire | Viable inhomogeneous model universe without dark energy from primordial
inflation | 4 pages, aastex, emualteapj5.sty. v5: Complete overhaul of notation
and presentation to improve clarity. Corrected volume factor increases age of
universe | null | null | null | gr-qc astro-ph hep-ph hep-th | null | A new model of the observed universe, using solutions to the full Einstein
equations, is developed from the hypothesis that our observable universe is an
underdense bubble, with an internally inhomogeneous fractal bubble distribution
of bound matter systems, in a spatially flat bulk universe. It is argued on the
basi... | [
{
"created": "Wed, 23 Mar 2005 10:22:03 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Mar 2005 17:45:02 GMT",
"version": "v2"
},
{
"created": "Fri, 25 Mar 2005 04:13:08 GMT",
"version": "v3"
},
{
"created": "Wed, 6 Apr 2005 20:00:16 GMT",
"version": "v4"
},
{
"cr... | 2007-05-23 | [
[
"Wiltshire",
"David L.",
""
]
] | A new model of the observed universe, using solutions to the full Einstein equations, is developed from the hypothesis that our observable universe is an underdense bubble, with an internally inhomogeneous fractal bubble distribution of bound matter systems, in a spatially flat bulk universe. It is argued on the basis ... |
2311.07637 | Mohammad Atazadeh | K. Atazadeh and H. Hadi | Source of black bounces in Rastall gravity | 19 pages, 23 figures, match the published version in JCAP; typo
corrected | JCAP01(2024)067 | 10.1088/1475-7516/2024/01/067 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this study, we explore the black bounce solution in Rastall gravity and
its potential source field, which can be described as a black hole or wormhole
solution depending on certain parameters. We focus on the Bardeen-Type black
bounce and Simpson-Visser solution and aim to identify an appropriate source
field for ... | [
{
"created": "Mon, 13 Nov 2023 19:14:08 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 2023 19:02:21 GMT",
"version": "v2"
},
{
"created": "Sat, 17 Feb 2024 18:25:10 GMT",
"version": "v3"
}
] | 2024-02-20 | [
[
"Atazadeh",
"K.",
""
],
[
"Hadi",
"H.",
""
]
] | In this study, we explore the black bounce solution in Rastall gravity and its potential source field, which can be described as a black hole or wormhole solution depending on certain parameters. We focus on the Bardeen-Type black bounce and Simpson-Visser solution and aim to identify an appropriate source field for th... |
2003.02230 | Theo Torres | Theo Torres | Estimate of the superradiance spectrum in dispersive media | 8 pages, 5 figures. Proceeding paper for the discussion meeting "The
next generation of analogue gravity experiments" (The Royal Society, London,
December 9-10, 2019). Accepted for publication in Philosophical Transactions
of the Royal Society A | null | 10.1098/rsta.2019.0236 | null | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In 2016, the Nottingham group detected the rotational superradiance effect.
While this experiment demonstrated the robustness of the superradiance process,
it still lacks a complete theoretical description due to the many effects at
stage in the experiment. In this paper, we shine new light on this experiment
by deri... | [
{
"created": "Wed, 4 Mar 2020 18:16:27 GMT",
"version": "v1"
}
] | 2021-03-17 | [
[
"Torres",
"Theo",
""
]
] | In 2016, the Nottingham group detected the rotational superradiance effect. While this experiment demonstrated the robustness of the superradiance process, it still lacks a complete theoretical description due to the many effects at stage in the experiment. In this paper, we shine new light on this experiment by derivi... |
1803.00209 | Hamid Reza Sepangi | M. H. Abbassi, A. Jozani, H. R. Sepangi | Anisotropic Mimetic Cosmology | 12 pages, 4 figures, to appear in PRD | Phys. Rev. D 97, 123510 (2018) | 10.1103/PhysRevD.97.123510 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a mimetic set up in which the mimetic scalar is coupled to a
vector field. It is shown that such a field with a time-like component does not
contribute to the background equations and yet produces healthy isocurvature
perturbations with respect to ghost and gradient instabilities in spite of the
absence o... | [
{
"created": "Thu, 1 Mar 2018 04:39:14 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Mar 2018 04:14:22 GMT",
"version": "v2"
},
{
"created": "Tue, 29 May 2018 09:22:17 GMT",
"version": "v3"
}
] | 2018-06-20 | [
[
"Abbassi",
"M. H.",
""
],
[
"Jozani",
"A.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We consider a mimetic set up in which the mimetic scalar is coupled to a vector field. It is shown that such a field with a time-like component does not contribute to the background equations and yet produces healthy isocurvature perturbations with respect to ghost and gradient instabilities in spite of the absence of ... |
2402.05411 | Zihan Yan | Aron C. Wall, Zihan Yan | Linearised Second Law for Higher Curvature Gravity and Non-Minimally
Coupled Vector Fields | 38 pages, 2 figures, 2 tables; references and comments added in v2 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Expanding the work of arXiv:1504.08040, we show that black holes obey a
second law for linear perturbations to bifurcate Killing horizons, in any
covariant higher curvature gravity coupled to scalar and vector fields. The
vector fields do not need to be gauged, and (like the scalars) can have
arbitrary non-minimal co... | [
{
"created": "Thu, 8 Feb 2024 05:06:23 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Apr 2024 10:40:53 GMT",
"version": "v2"
}
] | 2024-04-30 | [
[
"Wall",
"Aron C.",
""
],
[
"Yan",
"Zihan",
""
]
] | Expanding the work of arXiv:1504.08040, we show that black holes obey a second law for linear perturbations to bifurcate Killing horizons, in any covariant higher curvature gravity coupled to scalar and vector fields. The vector fields do not need to be gauged, and (like the scalars) can have arbitrary non-minimal coup... |
gr-qc/9711055 | V. A. Rubakov | V.A. Rubakov | Long-ranged forces and energy non-conservation in (1+1)-dimensions | 9 pages, 2 figures. To appear in Proc. XX Int. Workshop on
Fundamental Problems of High Energy Physics and Field Theory, Protvino, June
1997 | null | null | INR-97-232VR | gr-qc | null | We consider whether local and causal non-conservation of energy may occur in
generally covariant theories with long-ranged fields (analogs of Newton's
gravity) whose source is energy--momentum. We find that such a possibility
exists in (1+1) dimensions.
| [
{
"created": "Tue, 18 Nov 1997 15:01:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rubakov",
"V. A.",
""
]
] | We consider whether local and causal non-conservation of energy may occur in generally covariant theories with long-ranged fields (analogs of Newton's gravity) whose source is energy--momentum. We find that such a possibility exists in (1+1) dimensions. |
2402.10560 | Jose Luis Hernandez-Pastora | Jos\'e Luis Hern\'andez-Pastora | Space-time-matter gravity as the origin of rotation in 4-D stationary
and axisymmetric vacuum solutions | 6 pages, no figures. Submitted to European Physics Journal C | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The standard theory of General Relativity (GR) currently provides the most
reliable description of all gravitational events in Astrophysics and Cosmology.
However, current Astronomy allows measurements that contradict the predictions
of GR in some gravitational scenarios such as the accelerated expansion of the
Unive... | [
{
"created": "Fri, 16 Feb 2024 10:46:35 GMT",
"version": "v1"
}
] | 2024-02-19 | [
[
"Hernández-Pastora",
"José Luis",
""
]
] | The standard theory of General Relativity (GR) currently provides the most reliable description of all gravitational events in Astrophysics and Cosmology. However, current Astronomy allows measurements that contradict the predictions of GR in some gravitational scenarios such as the accelerated expansion of the Univers... |
2102.05987 | Miguel Manzano | M. Manzano, M. Mars | Null shells: general matching across null boundaries and connection with
cut-and-paste formalism | 35 pages, 3 figures | null | 10.1088/1361-6382/abfd91 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Null shells are a useful geometric construction to study the propagation of
infinitesimally thin concentrations of massless particles or impulsive waves.
In this paper, we determine and study the necessary and sufficient conditions
for the matching of two spacetimes with respective null embedded hypersurfaces
as boun... | [
{
"created": "Thu, 11 Feb 2021 13:13:54 GMT",
"version": "v1"
}
] | 2021-08-11 | [
[
"Manzano",
"M.",
""
],
[
"Mars",
"M.",
""
]
] | Null shells are a useful geometric construction to study the propagation of infinitesimally thin concentrations of massless particles or impulsive waves. In this paper, we determine and study the necessary and sufficient conditions for the matching of two spacetimes with respective null embedded hypersurfaces as bounda... |
0710.3582 | Andreas Martin Lisewski | A. M. Lisewski | Earth's extensive entropy bound | 3 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The possibility of planetary mass black hole production by crossing entropy
limits is addressed. Such a possibility is given by pointing out that two
geophysical quantities have comparable values: first, Earth's total negative
entropy flux integrated over geological time and, second, its extensive entropy
bound, whic... | [
{
"created": "Thu, 18 Oct 2007 19:25:21 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2007 22:21:36 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Dec 2012 15:55:36 GMT",
"version": "v3"
}
] | 2012-12-21 | [
[
"Lisewski",
"A. M.",
""
]
] | The possibility of planetary mass black hole production by crossing entropy limits is addressed. Such a possibility is given by pointing out that two geophysical quantities have comparable values: first, Earth's total negative entropy flux integrated over geological time and, second, its extensive entropy bound, which ... |
gr-qc/9312001 | B. Bruegmann | B. Bruegmann | Loop Representations | 38 pages, MPI-Ph/93-94 | null | 10.1007/3-540-58339-4_20 | null | gr-qc | null | The loop representation plays an important role in canonical quantum gravity
because loop variables allow a natural treatment of the constraints. In these
lectures we give an elementary introduction to (i) the relevant history of
loops in knot theory and gauge theory, (ii) the loop representation of Maxwell
theory, a... | [
{
"created": "Wed, 1 Dec 1993 16:34:08 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Dec 1993 07:44:18 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Bruegmann",
"B.",
""
]
] | The loop representation plays an important role in canonical quantum gravity because loop variables allow a natural treatment of the constraints. In these lectures we give an elementary introduction to (i) the relevant history of loops in knot theory and gauge theory, (ii) the loop representation of Maxwell theory, and... |
2007.03726 | Cosimo Stornaiolo | Cosimo Stornaiolo | Emergent classical universes from initial quantum states in a
tomographical description | Submitted to International Journal of Geometric Methods in Modern
Physics | null | 10.1142/S0219887820501674 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum and classical physical states are represented in a unified way when
they are described by symplectic tomography. Therefore this representation
allows us to study directly the necessary conditions for a classical universe
to emerge from a quantum state. In the previous study on the de Sitter universe
this was ... | [
{
"created": "Tue, 7 Jul 2020 18:29:38 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Aug 2020 10:32:37 GMT",
"version": "v2"
}
] | 2020-10-28 | [
[
"Stornaiolo",
"Cosimo",
""
]
] | Quantum and classical physical states are represented in a unified way when they are described by symplectic tomography. Therefore this representation allows us to study directly the necessary conditions for a classical universe to emerge from a quantum state. In the previous study on the de Sitter universe this was do... |
gr-qc/9808043 | Veronika E. Hubeny | Veronika E. Hubeny | Overcharging a Black Hole and Cosmic Censorship | 26 pages, 3 figures, LaTeX | Phys. Rev. D 59, 064013 (1999) | 10.1103/PhysRevD.59.064013 | null | gr-qc hep-th | null | We show that, contrary to a widespread belief, one can overcharge a near
extremal Reissner-Nordstrom black hole by throwing in a charged particle, as
long as the backreaction effects may be considered negligible. Furthermore, we
find that we can make the particle's classical radius, mass, and charge, as
well as the r... | [
{
"created": "Mon, 17 Aug 1998 19:29:22 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Hubeny",
"Veronika E.",
""
]
] | We show that, contrary to a widespread belief, one can overcharge a near extremal Reissner-Nordstrom black hole by throwing in a charged particle, as long as the backreaction effects may be considered negligible. Furthermore, we find that we can make the particle's classical radius, mass, and charge, as well as the rel... |
1408.5668 | Sushant Ghosh Prof | Sushant G. Ghosh | A nonsingular rotating black hole | 13 pages, 5 figures, 1 table, several changes, accepted in EPJC (as
Letter) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spacetime singularities in classical general relativity are inevitable,
which are also predicated by the celebrated singularity theorems. However, it
is general belief that singularities do not exist in the nature and they are
the limitations of the general relativity. In the absence of a well defined
quantum gra... | [
{
"created": "Mon, 25 Aug 2014 06:35:46 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Aug 2014 13:21:02 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Jun 2015 12:55:01 GMT",
"version": "v3"
},
{
"created": "Sat, 17 Oct 2015 03:37:58 GMT",
"version": "v4"
}
] | 2015-10-20 | [
[
"Ghosh",
"Sushant G.",
""
]
] | The spacetime singularities in classical general relativity are inevitable, which are also predicated by the celebrated singularity theorems. However, it is general belief that singularities do not exist in the nature and they are the limitations of the general relativity. In the absence of a well defined quantum gravi... |
2406.01679 | Gregoire Pierra | Gr\'egoire Pierra, Simone Mastrogiovanni and St\'ephane Perri\`es | The spin magnitude of stellar-mass binary black holes evolves with the
mass: evidence from gravitational wave data | Letter: 9 pages, 3 figures, 1 table. Supplementary Material: 38
pages, 26 figures, 11 tables | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | The relation between the mass and spin of stellar-mass binary black holes
(BBHs) has been proposed to be a smoking gun for the presence of multiple
formation channels for compact objects. First-generation black holes (BHs)
formed by isolated binary stellar progenitors are expected to have nearly
aligned small spins, ... | [
{
"created": "Mon, 3 Jun 2024 18:00:01 GMT",
"version": "v1"
}
] | 2024-06-05 | [
[
"Pierra",
"Grégoire",
""
],
[
"Mastrogiovanni",
"Simone",
""
],
[
"Perriès",
"Stéphane",
""
]
] | The relation between the mass and spin of stellar-mass binary black holes (BBHs) has been proposed to be a smoking gun for the presence of multiple formation channels for compact objects. First-generation black holes (BHs) formed by isolated binary stellar progenitors are expected to have nearly aligned small spins, wh... |
1903.06079 | Jeremy Wachter | Jose J. Blanco-Pillado, Ken D. Olum, and Jeremy M. Wachter | Gravitational backreaction simulations of simple cosmic string loops | 29 pages, 17 figures | Phys. Rev. D 100, 023535 (2019) | 10.1103/PhysRevD.100.023535 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the results of computational gravitational backreaction on simple
models of cosmic string loops. These results give us insight into the general
behavior of cusps and kinks on loops, in addition to other features of
evolution. Kinks are rounded off via an asymmetric and divergent correction to
the string di... | [
{
"created": "Thu, 14 Mar 2019 15:32:26 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jul 2019 11:41:21 GMT",
"version": "v2"
}
] | 2019-07-29 | [
[
"Blanco-Pillado",
"Jose J.",
""
],
[
"Olum",
"Ken D.",
""
],
[
"Wachter",
"Jeremy M.",
""
]
] | We present the results of computational gravitational backreaction on simple models of cosmic string loops. These results give us insight into the general behavior of cusps and kinks on loops, in addition to other features of evolution. Kinks are rounded off via an asymmetric and divergent correction to the string dire... |
gr-qc/0005006 | Alexander Linden | Alexander N. Linden | A Classification of Spherically Symmetric Static Solutions of SU(2)
Einstein Yang Mills Equations with Non-negative Cosmological Constant | 37 pages | null | null | null | gr-qc | null | We categorize the global structure of spherically symmetric static solutions
of Einstein SU(2) Yang Mills equations with positive cosmological constant that
are smooth at the center of spherical symmetry.
| [
{
"created": "Mon, 1 May 2000 22:48:51 GMT",
"version": "v1"
},
{
"created": "Thu, 4 May 2000 19:26:43 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Linden",
"Alexander N.",
""
]
] | We categorize the global structure of spherically symmetric static solutions of Einstein SU(2) Yang Mills equations with positive cosmological constant that are smooth at the center of spherical symmetry. |
gr-qc/0604060 | Sergei Kopeikin | S.M. Kopeikin (University of Missouri-Columbia, USA), A.G. Polnarev
(Queen Mary University of London, England), G. Schaefer (Friedrich Schiller
University of Jena, Germany), and I.Yu. Vlasov (University of Guelph, Canada) | Gravimagnetic effect of the barycentric motion of the Sun and
determination of the post-Newtonian parameter gamma in the Cassini experiment | 12 pages, 1 figure, accepted to Physical Letters A | Phys.Lett.A367:276-280,2007 | 10.1016/j.physleta.2007.03.036 | null | gr-qc | null | The most precise test of the post-Newtonian gamma parameter in the solar
system has been achieved in measurement of the frequency shift of radio waves
to and from the Cassini spacecraft as they passed near the Sun. The test relies
upon the JPL model of radiowave propagation that includes, but does not
explicitly para... | [
{
"created": "Thu, 13 Apr 2006 16:58:35 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Jun 2006 18:34:26 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Jun 2006 20:28:02 GMT",
"version": "v3"
},
{
"created": "Tue, 24 Oct 2006 20:14:34 GMT",
"version": "v4"
},
{
"c... | 2008-11-26 | [
[
"Kopeikin",
"S. M.",
"",
"University of Missouri-Columbia, USA"
],
[
"Polnarev",
"A. G.",
"",
"Queen Mary University of London, England"
],
[
"Schaefer",
"G.",
"",
"Friedrich Schiller\n University of Jena, Germany"
],
[
"Vlasov",
"I. Yu.",
"... | The most precise test of the post-Newtonian gamma parameter in the solar system has been achieved in measurement of the frequency shift of radio waves to and from the Cassini spacecraft as they passed near the Sun. The test relies upon the JPL model of radiowave propagation that includes, but does not explicitly parame... |
2007.09467 | Sreenath Kizhakkumpurath Manikandan | Sreenath K. Manikandan and Andrew N. Jordan | Black holes as Andreev reflecting mirrors | 13 pages, 2 figures | Phys. Rev. D 102, 064028 (2020) | 10.1103/PhysRevD.102.064028 | null | gr-qc cond-mat.supr-con quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a microscopic quantum description for Hawking radiation as Andreev
reflections, which resolves the quantum information paradox at black hole event
horizons. The detailed microscopic analysis presented here reveals how a black
hole, treated as an Andreev reflecting mirror, provides a manifestly unitary
desc... | [
{
"created": "Sat, 18 Jul 2020 16:27:53 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Sep 2020 17:12:50 GMT",
"version": "v2"
}
] | 2020-09-11 | [
[
"Manikandan",
"Sreenath K.",
""
],
[
"Jordan",
"Andrew N.",
""
]
] | We propose a microscopic quantum description for Hawking radiation as Andreev reflections, which resolves the quantum information paradox at black hole event horizons. The detailed microscopic analysis presented here reveals how a black hole, treated as an Andreev reflecting mirror, provides a manifestly unitary descri... |
gr-qc/0212067 | Sushant G. Ghosh | S. G. Ghosh (Science College, Nagpur) and A. Banerjee (Jadavpur
Univesity, Kolkata) | Non-marginally bound inhomogeneous dust collapse in higher dimensional
space-time | 5 pages, RevTeX 4, no figures, 2 tables, Accepted in IJMPD | Int.J.Mod.Phys. D12 (2003) 639-648 | 10.1142/S0218271803003244 | null | gr-qc | null | We investigate the occurrence and nature of a naked singularity in the
gravitational collapse of an inhomogeneous dust cloud described by a
self-similar higher dimensional Tolman-Bondi space-time. Bound, marginally
bound and unbound space-times are analyzed. The degree of inhomogeneity of the
collapsing matter necess... | [
{
"created": "Mon, 16 Dec 2002 09:03:55 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Ghosh",
"S. G.",
"",
"Science College, Nagpur"
],
[
"Banerjee",
"A.",
"",
"Jadavpur\n Univesity, Kolkata"
]
] | We investigate the occurrence and nature of a naked singularity in the gravitational collapse of an inhomogeneous dust cloud described by a self-similar higher dimensional Tolman-Bondi space-time. Bound, marginally bound and unbound space-times are analyzed. The degree of inhomogeneity of the collapsing matter necessar... |
gr-qc/0008006 | Yutaka Hosotani | R. G. Daghigh, J. I. Kapusta, Y. Hosotani | False Vacuum Black Holes and Universes | 4 pages with 2 figures. revtex | null | null | NUC-MINN-00/12-T, OU-HET 354, UMN-TH-1916/00 | gr-qc hep-ph hep-th | null | We construct a black hole whose interior is the false vacuum and whose
exterior is the true vacuum of a classical field theory. From the outside the
metric is the usual Schwarzschild one, but from the inside the space is de
Sitter with a cosmological constant determined by the energy of the false
vacuum. The paramete... | [
{
"created": "Tue, 1 Aug 2000 18:50:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Daghigh",
"R. G.",
""
],
[
"Kapusta",
"J. I.",
""
],
[
"Hosotani",
"Y.",
""
]
] | We construct a black hole whose interior is the false vacuum and whose exterior is the true vacuum of a classical field theory. From the outside the metric is the usual Schwarzschild one, but from the inside the space is de Sitter with a cosmological constant determined by the energy of the false vacuum. The parameters... |
1007.4615 | Catherine Meusburger | C. Meusburger, K. Noui | Combinatorial quantisation of the Euclidean torus universe | 47 pages, 2 eps figures, minor changes, typos corrected | Nucl.Phys.B841:463-505,2010 | 10.1016/j.nuclphysb.2010.08.014 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We quantise the Euclidean torus universe via a combinatorial quantisation
formalism based on its formulation as a Chern-Simons gauge theory and on the
representation theory of the Drinfel'd double DSU(2). The resulting quantum
algebra of observables is given by two commuting copies of the Heisenberg
algebra, and the ... | [
{
"created": "Tue, 27 Jul 2010 04:13:42 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Sep 2010 05:50:48 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Meusburger",
"C.",
""
],
[
"Noui",
"K.",
""
]
] | We quantise the Euclidean torus universe via a combinatorial quantisation formalism based on its formulation as a Chern-Simons gauge theory and on the representation theory of the Drinfel'd double DSU(2). The resulting quantum algebra of observables is given by two commuting copies of the Heisenberg algebra, and the as... |
1403.3558 | Tim-Torben Paetz | Piotr T. Chru\'sciel, Tim-Torben Paetz | Characteristic initial data and smoothness of Scri. I. Framework and
results | 32 pages, some minor modifications | null | 10.1007/s00023-014-0364-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the Cauchy problem for the vacuum Einstein equations with data on
a complete light-cone in an asymptotically Minkowskian space-time. We provide
conditions on the free initial data which guarantee existence of global
solutions of the characteristic constraint equations. We present
necessary-and-sufficient c... | [
{
"created": "Fri, 14 Mar 2014 12:54:42 GMT",
"version": "v1"
},
{
"created": "Fri, 23 May 2014 10:09:51 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Sep 2014 14:23:50 GMT",
"version": "v3"
}
] | 2015-10-28 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Paetz",
"Tim-Torben",
""
]
] | We analyze the Cauchy problem for the vacuum Einstein equations with data on a complete light-cone in an asymptotically Minkowskian space-time. We provide conditions on the free initial data which guarantee existence of global solutions of the characteristic constraint equations. We present necessary-and-sufficient con... |
1605.05995 | David C Edwards | David C. Edwards | The effective two-dimensional phase space of cosmological scalar fields | Updated with corrections from journal report, 11 pages, 2 figures | null | 10.1088/1475-7516/2016/08/063 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown by Remmen and Carroll that, for a model universe which
contains only a kinetically canonical scalar field minimally coupled to gravity
it is possible to choose 'special coordinates' to describe a two-dimensional
effective phase space. The special, non-canonical, coordinates are
$\phi$,$\dot{\phi}$ a... | [
{
"created": "Wed, 18 May 2016 14:27:19 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Aug 2016 14:32:42 GMT",
"version": "v2"
}
] | 2016-09-07 | [
[
"Edwards",
"David C.",
""
]
] | It has been shown by Remmen and Carroll that, for a model universe which contains only a kinetically canonical scalar field minimally coupled to gravity it is possible to choose 'special coordinates' to describe a two-dimensional effective phase space. The special, non-canonical, coordinates are $\phi$,$\dot{\phi}$ and... |
gr-qc/0501095 | Michael H. Br\"ugmann | Michael H. Br\"ugmann | Light deflection in the post-linear gravitational field of bounded
point-like masses | 37 pages, 2 tables, no figures, submitted to Phys. Rev. D, v2:
misprints corrected, additional subsection in Sec. XI, expressions (57), (59)
and (66) were simplified, 3 references added | Phys.Rev. D72 (2005) 024012 | 10.1103/PhysRevD.72.024012 | null | gr-qc | null | Light deflection in the post-linear gravitational field of two bounded
point-like masses is treated. Both the light source and the observer are
assumed to be located at infinity in an asymptotically flat space. The
equations of light propagation are explicitly integrated to the second order in
$G/c^2$. Some of the in... | [
{
"created": "Sat, 29 Jan 2005 11:35:34 GMT",
"version": "v1"
},
{
"created": "Fri, 27 May 2005 18:59:18 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Brügmann",
"Michael H.",
""
]
] | Light deflection in the post-linear gravitational field of two bounded point-like masses is treated. Both the light source and the observer are assumed to be located at infinity in an asymptotically flat space. The equations of light propagation are explicitly integrated to the second order in $G/c^2$. Some of the inte... |
gr-qc/0212123 | M. B. Altaie | M.B. Altaie | Back reaction of the neutrino field in an Einstein universe | 4 figures | Class.Quant.Grav. 20 (2003) 331-340 | 10.1088/0264-9381/20/2/306 | null | gr-qc | null | The back reaction effect of the neutrino field at finite temperature in the
background of the static Einstein universe is investigated. A relationship
between the temperature of the universe and its radius is found. As in the
previously studied cases of the massless scalar field and the photon field,
this relation ex... | [
{
"created": "Mon, 30 Dec 2002 19:08:24 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Dec 2002 13:32:10 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Altaie",
"M. B.",
""
]
] | The back reaction effect of the neutrino field at finite temperature in the background of the static Einstein universe is investigated. A relationship between the temperature of the universe and its radius is found. As in the previously studied cases of the massless scalar field and the photon field, this relation exhi... |
gr-qc/0112026 | James Geddes | James Geddes | The Collapse of Large Extra Dimensions | Uses revtex 4 | Phys.Rev. D65 (2002) 104015 | 10.1103/PhysRevD.65.104015 | null | gr-qc | null | In models of spacetime that are the product of a four-dimensional spacetime
with an ``extra'' dimension, there is the possibility that the extra dimension
will collapse to zero size, forming a singularity. We ask whether this collapse
is likely to destroy the spacetime. We argue, by an appeal to the
four-dimensional ... | [
{
"created": "Wed, 12 Dec 2001 03:06:06 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Geddes",
"James",
""
]
] | In models of spacetime that are the product of a four-dimensional spacetime with an ``extra'' dimension, there is the possibility that the extra dimension will collapse to zero size, forming a singularity. We ask whether this collapse is likely to destroy the spacetime. We argue, by an appeal to the four-dimensional co... |
gr-qc/0004072 | Yungui Gong | Yungui Gong | Equivalent frames in Brans-Dicke theory | 7 pages, no figure, revtex | null | null | utexas-hep-00-5 | gr-qc | null | We discuss the physical equivalence between the Einstein and Jordan frames in
Brans-Dicke theory. The inequivalence of conformal transformed theories is
clarified with the help of an old equivalence theorem of Chrisholm's.
| [
{
"created": "Mon, 24 Apr 2000 17:24:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gong",
"Yungui",
""
]
] | We discuss the physical equivalence between the Einstein and Jordan frames in Brans-Dicke theory. The inequivalence of conformal transformed theories is clarified with the help of an old equivalence theorem of Chrisholm's. |
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