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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1807.06098 | Marcin Kisielowski PhD | Marcin Kisielowski, Jerzy Lewandowski | Spin-foam model for gravity coupled to massless scalar field | 35 pages, 6 figures | null | 10.1088/1361-6382/aafcc0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A spin-foam model is derived from the canonical model of Loop Quantum Gravity
coupled to a massless scalar field. We generalized to the full theory the
scheme first proposed in the context of Loop Quantum Cosmology by Ashtekar,
Campiglia and Henderson, later developed by Henderson, Rovelli, Vidotto and
Wilson-Ewing.
| [
{
"created": "Mon, 16 Jul 2018 20:41:24 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Kisielowski",
"Marcin",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | A spin-foam model is derived from the canonical model of Loop Quantum Gravity coupled to a massless scalar field. We generalized to the full theory the scheme first proposed in the context of Loop Quantum Cosmology by Ashtekar, Campiglia and Henderson, later developed by Henderson, Rovelli, Vidotto and Wilson-Ewing. |
gr-qc/9304036 | Henri Waelbrock | Luis Urrutia and N. Morales | The Cayley-Hamilton theorem for supermatrices | ICN-UNAM-93-06, 34 pages | null | 10.1088/0305-4470/27/6/022 | null | gr-qc | null | Starting from the expression for the superdeterminant of (xI-M), where M is
an arbitrary supermatrix, we propose a definition for the corresponding
characteristic polynomial and we prove that each supermatrix satisfies its
characteristic equation. Depending upon the factorization properties of the
basic polynomials w... | [
{
"created": "Thu, 22 Apr 1993 19:46:29 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Urrutia",
"Luis",
""
],
[
"Morales",
"N.",
""
]
] | Starting from the expression for the superdeterminant of (xI-M), where M is an arbitrary supermatrix, we propose a definition for the corresponding characteristic polynomial and we prove that each supermatrix satisfies its characteristic equation. Depending upon the factorization properties of the basic polynomials who... |
2312.04352 | Daniel Mayerson | Jef Heynen, Daniel R. Mayerson | Gravitational Multipoles in Five Dimensions | 25 pages + appendices | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We define gravitational mass and current multipoles for five-dimensional,
stationary, and asymptotically flat vacuum metrics. We do this by generalizing
Thorne's asymptotically Cartesian and mass-centered (ACMC) coordinate formalism
to five dimensions, and prove that the multipoles defined in this way are
unambiguous... | [
{
"created": "Thu, 7 Dec 2023 15:17:16 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2024 17:30:22 GMT",
"version": "v2"
}
] | 2024-04-03 | [
[
"Heynen",
"Jef",
""
],
[
"Mayerson",
"Daniel R.",
""
]
] | We define gravitational mass and current multipoles for five-dimensional, stationary, and asymptotically flat vacuum metrics. We do this by generalizing Thorne's asymptotically Cartesian and mass-centered (ACMC) coordinate formalism to five dimensions, and prove that the multipoles defined in this way are unambiguously... |
gr-qc/0103056 | Bernard S. Kay | Bernard S. Kay (York) | Application of linear hyperbolic PDE to linear quantum fields in curved
spacetimes: especially black holes, time machines and a new semi-local vacuum
concept | Talk at Journe'es E'quations aux de'rive'es partielles, Nantes, 5-9
June, 2000. 19 pages, 6 eps figures. Style file edpa.cls supplied. Requires
latexsym, amssymb, epsf | Journe'es E'quations aux de'rive'es partielles, Nantes, 5 au 9
juin 2000, GDR 1151 (CNRS) pp. IX-1 to IX-19 (Also available at
http://www.math.sciences.univ-nantes.fr/edpa/2000/html) | null | null | gr-qc | null | Several situations of physical importance may be modelled by linear quantum
fields propagating in fixed spacetime-dependent classical background fields.
For example, the quantum Dirac field in a strong and/or time-dependent external
electromagnetic field accounts for the creation of electron-positron pairs out
of the... | [
{
"created": "Thu, 15 Mar 2001 19:56:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kay",
"Bernard S.",
"",
"York"
]
] | Several situations of physical importance may be modelled by linear quantum fields propagating in fixed spacetime-dependent classical background fields. For example, the quantum Dirac field in a strong and/or time-dependent external electromagnetic field accounts for the creation of electron-positron pairs out of the v... |
gr-qc/0407073 | Ghanashyam Date | Ghanashyam Date and Golam Mortuza Hossain | Effective Hamiltonian for Isotropic Loop Quantum Cosmology | 18 pages, revtex4, one figure. In version 2, only e-print archive
numbers are corrected. In this final version minor typos are corrected and an
extra para of explanation added in the discussion. To appear in Class.
Quantum Grav | Class.Quant.Grav. 21 (2004) 4941-4953 | 10.1088/0264-9381/21/21/012 | IMSc/2004/07/27 | gr-qc astro-ph hep-th | null | For a class of solutions of the fundamental difference equation of isotropic
loop quantum cosmology, the difference equation can be replaced by a
differential equation valid for {\em all} values of the triad variable. The
differential equation admits a `unique' non-singular continuation through
vanishing triad. A WKB... | [
{
"created": "Mon, 19 Jul 2004 14:09:42 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Jul 2004 04:02:47 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Oct 2004 11:58:02 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Date",
"Ghanashyam",
""
],
[
"Hossain",
"Golam Mortuza",
""
]
] | For a class of solutions of the fundamental difference equation of isotropic loop quantum cosmology, the difference equation can be replaced by a differential equation valid for {\em all} values of the triad variable. The differential equation admits a `unique' non-singular continuation through vanishing triad. A WKB a... |
1603.05302 | Rafael Nunes | Rafael C. Nunes | Connecting inflation with late cosmic acceleration by particle
production | 8 pages, 5 figures, Published version in International Journal of
Modern Physics D | Int. J. Mod. Phys. D, Vol. 25, No. 6 (2016) 1650067 | 10.1142/S021827181650067X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A continuous process of creation of particles is investigated as a possible
connection between the inflationary stage with late cosmic acceleration. In
this model, the inflationary era occurs due to a continuous and fast process of
creation of relativistic particles, and the recent accelerating phase is driven
by the... | [
{
"created": "Wed, 16 Mar 2016 22:31:56 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2016 13:10:04 GMT",
"version": "v2"
}
] | 2016-04-27 | [
[
"Nunes",
"Rafael C.",
""
]
] | A continuous process of creation of particles is investigated as a possible connection between the inflationary stage with late cosmic acceleration. In this model, the inflationary era occurs due to a continuous and fast process of creation of relativistic particles, and the recent accelerating phase is driven by the n... |
gr-qc/9911104 | Carlo Ungarelli | C. Ungarelli and A. Vecchio | Are pre-big-bang models falsifiable by gravitational wave experiments? | 4 pages, two eps figures, uses aipproc2.sty. To appear in the
Proceedings of the Third Edoardo Amaldi Conference | null | 10.1063/1.1291845 | null | gr-qc | null | One of the most interesting predictions of string-inspired cosmological
models is the presence of a stochastic background of relic gravitational waves
in the frequency band accessible to Earth-based detectors. Here we consider a
``minimal'' class of string cosmology models and explore whether they are
falsifiable by ... | [
{
"created": "Fri, 26 Nov 1999 11:03:43 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Ungarelli",
"C.",
""
],
[
"Vecchio",
"A.",
""
]
] | One of the most interesting predictions of string-inspired cosmological models is the presence of a stochastic background of relic gravitational waves in the frequency band accessible to Earth-based detectors. Here we consider a ``minimal'' class of string cosmology models and explore whether they are falsifiable by gr... |
0909.4862 | Weijia Li | Yi Ling, Wei-Jia Li, Jian-Pin Wu | Bouncing universe from a modified dispersion relation | 12 pages, no figure; references added, version published in JCAP | JCAP 0911:016,2009 | 10.1088/1475-7516/2009/11/016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we argue that modified Friedmann equations with a bounce
solution can be derived from a modified dispersion relation by employing a
thermodynamical description of general relativity on the apparent horizon.
| [
{
"created": "Mon, 28 Sep 2009 02:23:50 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Nov 2009 03:28:16 GMT",
"version": "v2"
}
] | 2010-04-30 | [
[
"Ling",
"Yi",
""
],
[
"Li",
"Wei-Jia",
""
],
[
"Wu",
"Jian-Pin",
""
]
] | In this paper we argue that modified Friedmann equations with a bounce solution can be derived from a modified dispersion relation by employing a thermodynamical description of general relativity on the apparent horizon. |
1305.4073 | Norman G\"urlebeck | Norman G\"urlebeck and David Petroff | A Generalized Family of Post-Newtonian Dedekind Ellipsoids | 23 pages, 17 figures; changes in v2: first paragraph in introduction
added, minor changes to agree with published version | Astrophys. J. 777:60 (2013) | 10.1088/0004-637X/777/1/60 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a family of Post-Newtonian (PN) Dedekind ellipsoids to first order.
They describe non-axially symmetric, homogeneous, and rotating figures of
equilibrium. The sequence of the Newtonian Dedekind ellipsoids allows for an
axially symmetric limit in which a uniformly rotating Maclaurin spheroid is
recovered. Ho... | [
{
"created": "Fri, 17 May 2013 13:33:43 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Nov 2013 14:18:58 GMT",
"version": "v2"
}
] | 2013-12-02 | [
[
"Gürlebeck",
"Norman",
""
],
[
"Petroff",
"David",
""
]
] | We derive a family of Post-Newtonian (PN) Dedekind ellipsoids to first order. They describe non-axially symmetric, homogeneous, and rotating figures of equilibrium. The sequence of the Newtonian Dedekind ellipsoids allows for an axially symmetric limit in which a uniformly rotating Maclaurin spheroid is recovered. Howe... |
1412.5689 | Ryuichi Fujita | Ryuichi Fujita | Gravitational Waves from a Particle in Circular Orbits around a Rotating
Black Hole to the 11th Post-Newtonian Order | 31 pages, additional datafiles are available at
http://www2.yukawa.kyoto-u.ac.jp/~misao/BHPC/calcs.html | Prog. Theor. Exp. Phys. 2015, Issue 3, 033E01 (2015) | 10.1093/ptep/ptv012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the energy flux of the gravitational waves radiated by a particle
of mass $\m$ in circular orbits around a rotating black hole of mass $M$ up to
the 11th post-Newtonian order (11PN), i.e. $v^{22}$ beyond the leading
Newtonian approximation where $v$ is the orbital velocity of the particle. By
comparing the... | [
{
"created": "Thu, 18 Dec 2014 00:30:03 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Mar 2015 07:42:17 GMT",
"version": "v2"
}
] | 2015-03-27 | [
[
"Fujita",
"Ryuichi",
""
]
] | We compute the energy flux of the gravitational waves radiated by a particle of mass $\m$ in circular orbits around a rotating black hole of mass $M$ up to the 11th post-Newtonian order (11PN), i.e. $v^{22}$ beyond the leading Newtonian approximation where $v$ is the orbital velocity of the particle. By comparing the P... |
gr-qc/9903099 | Andrzej Krolak | Andrzej Krolak | Data Analysis for Continuous Gravitational-Wave Signals | 5 pages, 1 figure, LaTex, Moriond.sty macro | null | null | null | gr-qc | null | The main problem that we will face in the data analysis for continuous
gravitational-wave sources is processing of a very long time series and a very
large parameter space. We present a number of analytic and numerical tools that
can be useful in such a data analysis. These consist of methods to calculate
false alarm... | [
{
"created": "Sun, 28 Mar 1999 08:22:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Krolak",
"Andrzej",
""
]
] | The main problem that we will face in the data analysis for continuous gravitational-wave sources is processing of a very long time series and a very large parameter space. We present a number of analytic and numerical tools that can be useful in such a data analysis. These consist of methods to calculate false alarm p... |
1012.5582 | Yurii Ignatyev | Yu.G.Ignatyev, V.Yu.Shulikovsky | The Relativistic kinetics of gravitational waves collisional damping in
hot Universe | 7 pages, 1 table, 18 references | Gravitation & Cosmology, vol. 12, 2006, p. 1-7 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The article is a translation of authors paper printed earlier in the
inaccessible edition and summarizing the results of research of gravitational
waves damping problem in the cosmologic plasma due to the different
interactions of elementary particles.
| [
{
"created": "Mon, 27 Dec 2010 09:47:20 GMT",
"version": "v1"
}
] | 2010-12-30 | [
[
"Ignatyev",
"Yu. G.",
""
],
[
"Shulikovsky",
"V. Yu.",
""
]
] | The article is a translation of authors paper printed earlier in the inaccessible edition and summarizing the results of research of gravitational waves damping problem in the cosmologic plasma due to the different interactions of elementary particles. |
1406.6938 | Martin Reiris | Martin Reiris | On the shape of bodies in General Relativistic regimes | 20 pages, 3 figures | null | 10.1007/s10714-014-1777-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The analysis of axisymmetric spacetimes, dynamical or stationary, is usually
made in the reduced space. We prove here a stability property of the quo- tient
space and use it together with minimal surface techniques to constraint the
shape of General Relativistic bodies in terms of their energy and rotation.
These con... | [
{
"created": "Thu, 26 Jun 2014 16:30:02 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Reiris",
"Martin",
""
]
] | The analysis of axisymmetric spacetimes, dynamical or stationary, is usually made in the reduced space. We prove here a stability property of the quo- tient space and use it together with minimal surface techniques to constraint the shape of General Relativistic bodies in terms of their energy and rotation. These const... |
0802.0028 | Farhad Darabi | F.Darabi | Accelerating universe with time variation of $G$ and $\Lambda$ | 22 pages | Astrophys. Space. Sci. 338, 171 (2012) | 10.1007/s10509-011-0901-9 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a gravitational model in which scale transformations play the key
role in obtaining dynamical $G$ and $\Lambda$. We take a scale non-invariant
gravitational action with a cosmological constant and a gravitational coupling
constant. Then, by a scale transformation, through a dilaton field, we obtain a
new act... | [
{
"created": "Thu, 31 Jan 2008 22:49:12 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Jun 2008 11:44:11 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Mar 2014 14:06:37 GMT",
"version": "v3"
}
] | 2015-05-13 | [
[
"Darabi",
"F.",
""
]
] | We study a gravitational model in which scale transformations play the key role in obtaining dynamical $G$ and $\Lambda$. We take a scale non-invariant gravitational action with a cosmological constant and a gravitational coupling constant. Then, by a scale transformation, through a dilaton field, we obtain a new actio... |
1702.07016 | Subenoy Chakraborty | Sanjukta Chakraborty and Subenoy Chakraborty | A study of charged cylindrical Gravitational collapse with dissipative
fluid | 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present works deals with gravitational collapse of cylindrical viscous
heat conducting anisotropic fluid following the work of Misner and Sharp. Using
Darmois matching conditions, the dynamical equations are derived and the effect
of charge and dissipative quantities over the cylindrical collapse are
analyzed. Fi... | [
{
"created": "Mon, 20 Feb 2017 09:49:36 GMT",
"version": "v1"
}
] | 2017-02-24 | [
[
"Chakraborty",
"Sanjukta",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The present works deals with gravitational collapse of cylindrical viscous heat conducting anisotropic fluid following the work of Misner and Sharp. Using Darmois matching conditions, the dynamical equations are derived and the effect of charge and dissipative quantities over the cylindrical collapse are analyzed. Fina... |
gr-qc/0404090 | Jerzy Matyjasek | Jerzy Matyjasek and O. B. Zaslavskii | Extremal limit for charged and rotating 2+1-dimensional black holes and
Bertotti-Robinson geometry | Presentation simplified. To appear in CQG | Class.Quant.Grav. 21 (2004) 4283 | 10.1088/0264-9381/21/17/014 | null | gr-qc hep-th | null | We consider 2+1--dimensional analogues of the Bertotti-Robinson (BR)
spacetimes in the sense that the coefficient at the angular part is a constant.
We show that such BR-like solutions are either pure static or uncharged
rotating. We trace the origin of the inconsistency between a charge and
rotation, considering the... | [
{
"created": "Wed, 21 Apr 2004 12:12:48 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Apr 2004 12:59:03 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Jul 2004 10:57:05 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Matyjasek",
"Jerzy",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | We consider 2+1--dimensional analogues of the Bertotti-Robinson (BR) spacetimes in the sense that the coefficient at the angular part is a constant. We show that such BR-like solutions are either pure static or uncharged rotating. We trace the origin of the inconsistency between a charge and rotation, considering the B... |
1310.2756 | J. Brian Pitts | J. Brian Pitts | A First Class Constraint Generates Not a Gauge Transformation, But a Bad
Physical Change: The Case of Electromagnetism | null | Annals of Physics 351 (2014), pp. 382-406 | 10.1016/j.aop.2014.08.014 | null | gr-qc hep-th physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Dirac-Bergmann constrained dynamics, a first-class constraint typically
does not _alone_ generate a gauge transformation. Each first-class constraint
in Maxwell's theory generates a change in the electric field E by an arbitrary
gradient, spoiling Gauss's law. The secondary constraint p^i,_i=0 still holds,
but bei... | [
{
"created": "Thu, 10 Oct 2013 10:22:19 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Oct 2014 19:05:02 GMT",
"version": "v2"
}
] | 2014-10-10 | [
[
"Pitts",
"J. Brian",
""
]
] | In Dirac-Bergmann constrained dynamics, a first-class constraint typically does not _alone_ generate a gauge transformation. Each first-class constraint in Maxwell's theory generates a change in the electric field E by an arbitrary gradient, spoiling Gauss's law. The secondary constraint p^i,_i=0 still holds, but being... |
0709.0657 | Leonardo Gualtieri | V. Ferrari, L. Gualtieri | Quasi-Normal Modes and Gravitational Wave Astronomy | 25 pages, 7 figures, to appear on Gen. Rel. Grav | Gen.Rel.Grav.40:945-970,2008 | 10.1007/s10714-007-0585-1 | null | gr-qc astro-ph | null | We review the main results obtained in the literature on quasi-normal modes
of compact stars and black holes, in the light of recent exciting developments
of gravitational wave detectors. Quasi-normal modes are a fundamental feature
of the gravitational signal emitted by compact objects in many astrophysical
processe... | [
{
"created": "Wed, 5 Sep 2007 14:01:37 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jan 2008 14:09:17 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ferrari",
"V.",
""
],
[
"Gualtieri",
"L.",
""
]
] | We review the main results obtained in the literature on quasi-normal modes of compact stars and black holes, in the light of recent exciting developments of gravitational wave detectors. Quasi-normal modes are a fundamental feature of the gravitational signal emitted by compact objects in many astrophysical processes;... |
2212.08554 | Manuel Tiglio | Franco Cerino, J. Andr\'es Diaz-Pace, Manuel Tiglio | An automated parameter domain decomposition approach for gravitational
wave surrogates using hp-greedy refinement | 16 pages, code available from authors upon request | null | null | null | gr-qc cs.LG math.RT | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce hp-greedy, a refinement approach for building gravitational wave
surrogates as an extension of the standard reduced basis framework. Our
proposal is data-driven, with a domain decomposition of the parameter space,
local reduced basis, and a binary tree as the resulting structure, which are
obtained in an... | [
{
"created": "Fri, 16 Dec 2022 16:12:51 GMT",
"version": "v1"
}
] | 2022-12-19 | [
[
"Cerino",
"Franco",
""
],
[
"Diaz-Pace",
"J. Andrés",
""
],
[
"Tiglio",
"Manuel",
""
]
] | We introduce hp-greedy, a refinement approach for building gravitational wave surrogates as an extension of the standard reduced basis framework. Our proposal is data-driven, with a domain decomposition of the parameter space, local reduced basis, and a binary tree as the resulting structure, which are obtained in an a... |
1310.1574 | Fatimah Shojai | F. Shojai and A. Shojai | Notes on the compatibility of type Ia supernovae data and varying--$G$
cosmology | null | Phys. Scr. 88, 055902, 2013 | 10.1088/0031-8949/88/05/055902 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observational data for type Ia supernovae, shows that the expansion of the
universe is accelerated. This accelerated expansion can be described by a
cosmological constant or by dark energy models like quintessence. An
interesting question may be raised here. Is it possible to describe the
accelerated expansion of uni... | [
{
"created": "Sun, 6 Oct 2013 11:23:00 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Shojai",
"F.",
""
],
[
"Shojai",
"A.",
""
]
] | Observational data for type Ia supernovae, shows that the expansion of the universe is accelerated. This accelerated expansion can be described by a cosmological constant or by dark energy models like quintessence. An interesting question may be raised here. Is it possible to describe the accelerated expansion of unive... |
gr-qc/9308021 | null | Nenad Manojlovi\'c and Bill Spence | Integrals of Motion in the Two Killing Vector Reduction of General
Relativity | 20 pages, plain TeX, SU-GP-93/7-8, UM-P-93/77 | Nucl.Phys.B423:243-259,1994 | 10.1016/0550-3213(94)90572-X | null | gr-qc | null | We apply the inverse scattering method to the midi-superspace models that are
characterized by a two-parameter Abelian group of motions with two spacelike
Killing vectors. We present a formulation that simplifies the construction of
the soliton solutions of Belinski\v i and Zakharov. Furthermore, it enables us
to obt... | [
{
"created": "Fri, 20 Aug 1993 20:58:00 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Manojlović",
"Nenad",
""
],
[
"Spence",
"Bill",
""
]
] | We apply the inverse scattering method to the midi-superspace models that are characterized by a two-parameter Abelian group of motions with two spacelike Killing vectors. We present a formulation that simplifies the construction of the soliton solutions of Belinski\v i and Zakharov. Furthermore, it enables us to obtai... |
gr-qc/0110046 | T. Padmanabhan | T.Padmanabhan | Combining general relativity and quantum theory: points of conflict and
contact | Invited Talk at "The Early Universe and Cosmological Observations: a
Critical Review", UCT, Cape Town, 23-25 July,2001; to appear in
Class.Quan.Grav | Class.Quant.Grav.19:3551-3566,2002 | 10.1088/0264-9381/19/13/312 | preprint IUCAA-44/2001 | gr-qc astro-ph hep-th | null | The issues related to bringing together the principles of general relativity
and quantum theory are discussed. After briefly summarising the points of
conflict between the two formalisms I focus on four specific themes in which
some contact has been established in the past between GR and quantum field
theory: (i) The... | [
{
"created": "Tue, 9 Oct 2001 07:11:51 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Padmanabhan",
"T.",
""
]
] | The issues related to bringing together the principles of general relativity and quantum theory are discussed. After briefly summarising the points of conflict between the two formalisms I focus on four specific themes in which some contact has been established in the past between GR and quantum field theory: (i) The r... |
gr-qc/9810070 | Pawel Nurowski | Pawel Nurowski, Lane Hughston, David Robinson | Extension of bundles of null directions | LaTex file, accepted in CQG | Class.Quant.Grav. 16 (1999) 255-279 | 10.1088/0264-9381/16/1/019 | null | gr-qc | null | The geometry of P, the bundle of null directions over an Einstein space-time,
is studied. The full set of invariants of the natural G-structure on P is
constructed using the Cartan method of equivalence. This leads to an extension
of P which is an elliptic fibration over the space-time. Examples are given
which show ... | [
{
"created": "Wed, 21 Oct 1998 19:35:46 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Nurowski",
"Pawel",
""
],
[
"Hughston",
"Lane",
""
],
[
"Robinson",
"David",
""
]
] | The geometry of P, the bundle of null directions over an Einstein space-time, is studied. The full set of invariants of the natural G-structure on P is constructed using the Cartan method of equivalence. This leads to an extension of P which is an elliptic fibration over the space-time. Examples are given which show th... |
2111.11844 | Gaoping Long | Gaoping Long, Yongge Ma | The effective dynamics of weak coupling loop quantum gravity | null | null | 10.1103/PhysRevD.105.044043 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | By taking the limit that Newton's Gravitational constant tends to zero, the
weak coupling loop quantum gravity can be formulated as a $U(1)^3$ gauge theory
instead of the original $SU(2)$ gauge theory. In this paper, a parametrization
of the $SU(2)$ holonomy-flux variables by the $U(1)^3$ holonomy-flux variables
is i... | [
{
"created": "Tue, 23 Nov 2021 13:16:26 GMT",
"version": "v1"
}
] | 2022-03-09 | [
[
"Long",
"Gaoping",
""
],
[
"Ma",
"Yongge",
""
]
] | By taking the limit that Newton's Gravitational constant tends to zero, the weak coupling loop quantum gravity can be formulated as a $U(1)^3$ gauge theory instead of the original $SU(2)$ gauge theory. In this paper, a parametrization of the $SU(2)$ holonomy-flux variables by the $U(1)^3$ holonomy-flux variables is int... |
1506.01572 | Eva Hackmann | Eva Hackmann and Claus L\"ammerzahl | Analytical solutions for geodesics in black hole spacetimes | 8 pages; based on the contribution to the "Karl Schwarzschild Meeting
2013" in Frankfurt, Germany. arXiv admin note: substantial text overlap with
arXiv:1506.00807 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the analytical solution methods for the geodesic equations in
Kerr-Newman-Taub-NUT-de Sitter spacetimes and its subclasses in terms of
elliptic and hyperelliptic functions. A short guide to corresponding literature
for general timelike and lightlike motion is also presented.
| [
{
"created": "Thu, 4 Jun 2015 13:05:53 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Hackmann",
"Eva",
""
],
[
"Lämmerzahl",
"Claus",
""
]
] | We review the analytical solution methods for the geodesic equations in Kerr-Newman-Taub-NUT-de Sitter spacetimes and its subclasses in terms of elliptic and hyperelliptic functions. A short guide to corresponding literature for general timelike and lightlike motion is also presented. |
2112.14281 | Maxim Eingorn | M. Eingorn, N. O'Briant, K. Arzu, M. Brilenkov, A. Zhuk | Gravitational potentials and forces in the Lattice Universe: a slab | This is a preprint of an article published in the European Physical
Journal Plus. The final authenticated version is available online at:
https://doi.org/10.1140/epjp/s13360-021-01139-y | Eur. Phys. J. Plus 136, 205 (2021) | 10.1140/epjp/s13360-021-01139-y | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study the effect of the slab topology $T\times R\times R$ of the Universe
on the form of gravitational potentials and forces created by point-like
masses. We obtain two alternative forms of solutions: one is based on the
Fourier series expansion of the delta function using the periodical property
along the toroida... | [
{
"created": "Tue, 28 Dec 2021 19:40:29 GMT",
"version": "v1"
}
] | 2021-12-30 | [
[
"Eingorn",
"M.",
""
],
[
"O'Briant",
"N.",
""
],
[
"Arzu",
"K.",
""
],
[
"Brilenkov",
"M.",
""
],
[
"Zhuk",
"A.",
""
]
] | We study the effect of the slab topology $T\times R\times R$ of the Universe on the form of gravitational potentials and forces created by point-like masses. We obtain two alternative forms of solutions: one is based on the Fourier series expansion of the delta function using the periodical property along the toroidal ... |
2106.06696 | Slava G. Turyshev | Slava G. Turyshev, Viktor T. Toth | Gravitational lensing by an extended mass distribution | 22 pages, 5 figures | Phys. Rev. D 104, 044013 (2021) | 10.1103/PhysRevD.104.044013 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue our investigation of the optical properties of the solar
gravitational lens (SGL). We treat the Sun as an extended axisymmetric body and
model its gravitational field using zonal harmonics. We consider a point source
that is positioned at a large but finite distance from the Sun and, using our
new angular... | [
{
"created": "Sat, 12 Jun 2021 06:21:57 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Aug 2021 15:52:38 GMT",
"version": "v2"
}
] | 2021-08-06 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Toth",
"Viktor T.",
""
]
] | We continue our investigation of the optical properties of the solar gravitational lens (SGL). We treat the Sun as an extended axisymmetric body and model its gravitational field using zonal harmonics. We consider a point source that is positioned at a large but finite distance from the Sun and, using our new angular e... |
1903.03778 | Bobir Toshmatov | Bobir Toshmatov, Zden\v{e}k Stuchl\'ik, Bobomurat Ahmedov, Daniele
Malafarina | Relaxations of perturbations of spacetimes in general relativity coupled
to nonlinear electrodynamics | 9 pages, 4 figures, 1 table | Phys. Rev. D 99, 064043 (2019) | 10.1103/PhysRevD.99.064043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Three well known exact regular solutions of general relativity (GR) coupled
to nonlinear electrodynamics (NED), namely the Maxwellian, Bardeen and Hayward
regular spacetimes, which can describe either a regular black hole or a
geometry without horizons, have been considered. Relaxation times for the
scalar, electroma... | [
{
"created": "Sat, 9 Mar 2019 10:52:18 GMT",
"version": "v1"
}
] | 2019-03-29 | [
[
"Toshmatov",
"Bobir",
""
],
[
"Stuchlík",
"Zdeněk",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Malafarina",
"Daniele",
""
]
] | Three well known exact regular solutions of general relativity (GR) coupled to nonlinear electrodynamics (NED), namely the Maxwellian, Bardeen and Hayward regular spacetimes, which can describe either a regular black hole or a geometry without horizons, have been considered. Relaxation times for the scalar, electromagn... |
1906.01927 | Run-Qiu Yang | Run-Qiu Yang, Hui Liu, Shining Zhu, Le Luo and Rong-Gen Cai | Simulating quantum field theory in curved spacetime with quantum
many-body systems | 9 pages, 3 figures, published version | Phys. Rev. Research 2, 023107 (2020) | 10.1103/PhysRevResearch.2.023107 | null | gr-qc cond-mat.stat-mech hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper proposes a new general framework to build a one-to-one
correspondence between quantum field theories in static 1+1 dimensional curved
spacetime and quantum many-body systems. We show that a massless scalar field
in an arbitrary 2-dimensional static spacetime is always equivalent to a
site-dependent bosonic... | [
{
"created": "Wed, 5 Jun 2019 10:35:53 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 2020 09:14:31 GMT",
"version": "v2"
}
] | 2020-05-06 | [
[
"Yang",
"Run-Qiu",
""
],
[
"Liu",
"Hui",
""
],
[
"Zhu",
"Shining",
""
],
[
"Luo",
"Le",
""
],
[
"Cai",
"Rong-Gen",
""
]
] | This paper proposes a new general framework to build a one-to-one correspondence between quantum field theories in static 1+1 dimensional curved spacetime and quantum many-body systems. We show that a massless scalar field in an arbitrary 2-dimensional static spacetime is always equivalent to a site-dependent bosonic h... |
1803.00014 | Alberto Diez-Tejedor | Alberto Diez-Tejedor, Francisco Flores, Gustavo Niz | Horndeski dark matter and beyond | 11 pages, no figures. To appear in Phys. Rev. D | Phys. Rev. D 97, 123524 (2018) | 10.1103/PhysRevD.97.123524 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the Gleyzes-Langlois-Piazza-Vernizzi action, we derive the most
general effective theory that is invariant under internal shifts and a
$\mathbb{Z}_2$ mirror symmetry in the scalar sector. Contrary to what one may
think, this model presents a dark matter tracker previous to the dark energy
domination. We... | [
{
"created": "Wed, 28 Feb 2018 19:00:02 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Jun 2018 21:43:12 GMT",
"version": "v2"
}
] | 2018-06-20 | [
[
"Diez-Tejedor",
"Alberto",
""
],
[
"Flores",
"Francisco",
""
],
[
"Niz",
"Gustavo",
""
]
] | Starting from the Gleyzes-Langlois-Piazza-Vernizzi action, we derive the most general effective theory that is invariant under internal shifts and a $\mathbb{Z}_2$ mirror symmetry in the scalar sector. Contrary to what one may think, this model presents a dark matter tracker previous to the dark energy domination. We s... |
1308.1917 | Miguel Socolovsky | O. Brauer, E. Kirchuk, L. Raviola and M. Socolovsky | Entropy of a Rindler Observer | 5 pages, 2 figures | null | 10.1007/s10773-013-1813-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the entropy of a Rindler particle-detector (observer) in the
presence of a quantum field in the Minkowski vacuum state; due to the Unruh
effect, the observer is immersed in a thermal bath at a temperature
proportional to its proper acceleration.
| [
{
"created": "Thu, 8 Aug 2013 18:08:06 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Brauer",
"O.",
""
],
[
"Kirchuk",
"E.",
""
],
[
"Raviola",
"L.",
""
],
[
"Socolovsky",
"M.",
""
]
] | We compute the entropy of a Rindler particle-detector (observer) in the presence of a quantum field in the Minkowski vacuum state; due to the Unruh effect, the observer is immersed in a thermal bath at a temperature proportional to its proper acceleration. |
2401.01440 | Pablo Laguna | Nirmal Patel, Aycin Aykutalp, Pablo Laguna | Calculating Quasi-Normal Modes of Schwarzschild Black Holes with Physics
Informed Neural Networks | 20 pages, 6 figures | null | null | null | gr-qc physics.comp-ph | http://creativecommons.org/licenses/by/4.0/ | Machine learning, particularly neural networks, has rapidly permeated most
activities and work where data has a story to tell. Recently, deep learning has
started to be used for solving differential equations with input from physics,
also known as Physics Informed Neural Networks (PINNs). We present a study
showing t... | [
{
"created": "Tue, 2 Jan 2024 21:34:50 GMT",
"version": "v1"
}
] | 2024-01-04 | [
[
"Patel",
"Nirmal",
""
],
[
"Aykutalp",
"Aycin",
""
],
[
"Laguna",
"Pablo",
""
]
] | Machine learning, particularly neural networks, has rapidly permeated most activities and work where data has a story to tell. Recently, deep learning has started to be used for solving differential equations with input from physics, also known as Physics Informed Neural Networks (PINNs). We present a study showing the... |
1607.03003 | Jiro Matsumoto | Jiro Matsumoto | Scalar field dark energy with a minimal coupling in a spherically
symmetric background | 15 pages, 3 figures; v2: equations corrected and a figure added,
conclusions are changed a little, v3: references added, explanations
expanded, version to appear in IJMPD | Int. J. Mod. Phys. D, 27, 1750173 (2018) | 10.1142/S0218271817501735 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dark energy models and modified gravity theories have been actively studied
and the behaviors in the solar system have been also carefully investigated in
a part of the models. However, the isotropic solutions of the field equations
in the simple models of dark energy, e.g. quintessence model without matter
coupling,... | [
{
"created": "Mon, 11 Jul 2016 15:35:41 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Aug 2016 14:48:32 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Aug 2017 05:12:15 GMT",
"version": "v3"
}
] | 2018-01-24 | [
[
"Matsumoto",
"Jiro",
""
]
] | Dark energy models and modified gravity theories have been actively studied and the behaviors in the solar system have been also carefully investigated in a part of the models. However, the isotropic solutions of the field equations in the simple models of dark energy, e.g. quintessence model without matter coupling, h... |
gr-qc/9708050 | Beverly K. Berger | Beverly K. Berger, David Garfinkle, Vincent Moncrief | Comment on ``The Gowdy $T^3$ Cosmologies Revisited'' | 3 pages, Revtex, 0 figures | null | null | null | gr-qc | null | A standard and reasonable definition of asymptotic velocity term dominance
(AVTD) shows that the numerical study by Hern and Stewart (gr-qc/9708038)
confirms previous results that generic Gowdy cosmologies on $T^3 \times R$ have
an AVTD singularity.
| [
{
"created": "Thu, 21 Aug 1997 11:32:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Berger",
"Beverly K.",
""
],
[
"Garfinkle",
"David",
""
],
[
"Moncrief",
"Vincent",
""
]
] | A standard and reasonable definition of asymptotic velocity term dominance (AVTD) shows that the numerical study by Hern and Stewart (gr-qc/9708038) confirms previous results that generic Gowdy cosmologies on $T^3 \times R$ have an AVTD singularity. |
gr-qc/0410117 | Nelson Pinto-Neto | Nelson Pinto-Neto | The Bohm Interpretation of Quantum Cosmology | 28 pages, 1 figure, contribution to the James Cushing festschrift to
appear in Foundations of Physics | Found.Phys.35:577-603,2005 | 10.1007/s10701-004-2012-8 | null | gr-qc | null | I make a review on the aplications of the Bohm-De Broglie interpretation of
quantum mechanics to quantum cosmology. In the framework of minisuperspaces
models, I show how quantum cosmological effects in Bohm's view can avoid the
initial singularity, isotropize the Universe, and even be a cause for the
present observe... | [
{
"created": "Fri, 22 Oct 2004 20:38:28 GMT",
"version": "v1"
}
] | 2011-08-04 | [
[
"Pinto-Neto",
"Nelson",
""
]
] | I make a review on the aplications of the Bohm-De Broglie interpretation of quantum mechanics to quantum cosmology. In the framework of minisuperspaces models, I show how quantum cosmological effects in Bohm's view can avoid the initial singularity, isotropize the Universe, and even be a cause for the present observed ... |
1705.08315 | Mauricio Bellini | Mauricio Bellini (IFIMAR - CONICET and UNMdP) | Origin of time before inflation from a topological phase transition | Version accepted in Physics of the Dark Universe. arXiv admin note:
substantial text overlap with arXiv:1610.07979 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the origin of the universe (or pre-inflation) by suggesting that the
primordial space-time in the universe suffered a global topological phase
transition, from a 4D Euclidean manifold to an asymptotic 4D hyperbolic one. We
introduce a complex time, $\tau$, such that its real part becomes dominant
after start... | [
{
"created": "Mon, 22 May 2017 15:22:36 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Jun 2017 02:29:17 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Jul 2017 22:27:28 GMT",
"version": "v3"
}
] | 2017-07-21 | [
[
"Bellini",
"Mauricio",
"",
"IFIMAR - CONICET and UNMdP"
]
] | We study the origin of the universe (or pre-inflation) by suggesting that the primordial space-time in the universe suffered a global topological phase transition, from a 4D Euclidean manifold to an asymptotic 4D hyperbolic one. We introduce a complex time, $\tau$, such that its real part becomes dominant after started... |
1202.6189 | Pedro Castelo Ferreira Dr. | P. Castelo Ferreira | Constraining an Expanding Locally Anisotropic metric from the Pioneer
anomaly | 22 pages; 6 figures; based on arXiv:1102.2061 with updated estimative
for Pioneer anomaly | Advances in Space Research 51 (2013) 1266-1277 | 10.1016/j.asr.2012.11.004 | null | gr-qc astro-ph.EP hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is discussed the possibility of a fine-tuneable contribution to the two
way Doppler acceleration either towards, either outwards the Sun for
heliocentric distances above 20 AU by considering a background described by an
Expanding Locally Anisotropic (ELA) metric. This metric encodes both the
standard local Schwarz... | [
{
"created": "Tue, 28 Feb 2012 11:55:03 GMT",
"version": "v1"
}
] | 2017-11-30 | [
[
"Ferreira",
"P. Castelo",
""
]
] | It is discussed the possibility of a fine-tuneable contribution to the two way Doppler acceleration either towards, either outwards the Sun for heliocentric distances above 20 AU by considering a background described by an Expanding Locally Anisotropic (ELA) metric. This metric encodes both the standard local Schwarzsc... |
1702.01882 | Subinoy Das | Prolay Krishna Chanda, Subinoy Das | Static structure of chameleon dark Matter as an explanation of dwarf
spheroidal galactic core | 8 pages, 5 figures, References added and typos corrected, accepted in
PRD | Phys. Rev. D 95, 083008 (2017) | 10.1103/PhysRevD.95.083008 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a novel mechanism which explains cored dark matter density profile
in recently observed dark matter rich dwarf spheroidal galaxies. In our
scenario, dark matter particle mass decreases gradually as function of distance
towards the center of a dwarf galaxy due to its interaction with a chameleon
scalar. At ... | [
{
"created": "Tue, 7 Feb 2017 05:11:47 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Apr 2017 12:35:21 GMT",
"version": "v2"
}
] | 2017-04-26 | [
[
"Chanda",
"Prolay Krishna",
""
],
[
"Das",
"Subinoy",
""
]
] | We propose a novel mechanism which explains cored dark matter density profile in recently observed dark matter rich dwarf spheroidal galaxies. In our scenario, dark matter particle mass decreases gradually as function of distance towards the center of a dwarf galaxy due to its interaction with a chameleon scalar. At cl... |
1804.09206 | Robert J. Scherrer | Robert J. Scherrer | Dark energy with $w \rightarrow -1$: Asymptotic $\Lambda$ versus
pseudo-$\Lambda$ | 7 pages, no figures, references added | Phys. Rev. D 97, 123521 (2018) | 10.1103/PhysRevD.97.123521 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If the dark energy density asymptotically approaches a nonzero constant,
$\rho_{DE} \rightarrow \rho_0$, then its equation of state parameter $w$
necessarily approaches $-1$. The converse is not true; dark energy with $w
\rightarrow -1$ can correspond to either $\rho_{DE} \rightarrow \rho_0$ or
$\rho_{DE} \rightarrow... | [
{
"created": "Tue, 24 Apr 2018 18:39:44 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Apr 2018 19:21:39 GMT",
"version": "v2"
}
] | 2018-06-20 | [
[
"Scherrer",
"Robert J.",
""
]
] | If the dark energy density asymptotically approaches a nonzero constant, $\rho_{DE} \rightarrow \rho_0$, then its equation of state parameter $w$ necessarily approaches $-1$. The converse is not true; dark energy with $w \rightarrow -1$ can correspond to either $\rho_{DE} \rightarrow \rho_0$ or $\rho_{DE} \rightarrow 0... |
2212.14065 | Parampreet Singh | Meysam Motaharfar, Parampreet Singh | Tunneling wavefunction proposal with loop quantum geometry effects | 19 pages, 6 figures. Expanded discussion on validity of effective
approach. References added. Published version in PRD | Phys. Rev. D 107, 066026 (2023) | 10.1103/PhysRevD.107.066026 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Vilenkin's tunneling wavefunction proposal our expanding universe is born
via a tunneling through a barrier from nothing at the zero scale factor. We
explore the viability of this proposal for the spatially closed FLRW model with
a positive cosmological constant including quantum gravity modifications in the
Planc... | [
{
"created": "Wed, 28 Dec 2022 19:04:51 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2023 18:22:41 GMT",
"version": "v2"
}
] | 2023-04-17 | [
[
"Motaharfar",
"Meysam",
""
],
[
"Singh",
"Parampreet",
""
]
] | In Vilenkin's tunneling wavefunction proposal our expanding universe is born via a tunneling through a barrier from nothing at the zero scale factor. We explore the viability of this proposal for the spatially closed FLRW model with a positive cosmological constant including quantum gravity modifications in the Planck ... |
1706.02070 | Hisa-aki Shinkai | Hisa-aki Shinkai, Takashi Torii | Nonlinear Dynamics in the Einstein-Gauss-Bonnet gravity | 14 pages, 10 figures, Fig.10 replaced, to be published in Phys. Rev.
D. (Aug, 2017) | Phys. Rev. D 96, 044009 (2017) | 10.1103/PhysRevD.96.044009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically investigated how the nonlinear dynamics depends on the
dimensionality and on the higher-order curvature corrections in the form of
Gauss-Bonnet (GB) terms. We especially monitored the processes of appearances
of a singularity (or black hole) in two models: (i) a perturbed wormhole throat
in spherically... | [
{
"created": "Wed, 7 Jun 2017 07:25:32 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jun 2017 03:13:23 GMT",
"version": "v2"
},
{
"created": "Mon, 31 Jul 2017 13:07:57 GMT",
"version": "v3"
}
] | 2017-08-16 | [
[
"Shinkai",
"Hisa-aki",
""
],
[
"Torii",
"Takashi",
""
]
] | We numerically investigated how the nonlinear dynamics depends on the dimensionality and on the higher-order curvature corrections in the form of Gauss-Bonnet (GB) terms. We especially monitored the processes of appearances of a singularity (or black hole) in two models: (i) a perturbed wormhole throat in spherically s... |
1912.02922 | Barak Shoshany | Barak Shoshany | At the Corner of Space and Time | 162 pages, 11 figures, PhD thesis; corrected minor typos and updated
references | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a rigorous piecewise-flat discretization of classical general
relativity in the first-order formulation, in both 2+1 and 3+1 dimensions,
carefully keeping track of curvature and torsion via holonomies. We show that
the resulting phase space is precisely that of spin networks, the quantum
states of discrete... | [
{
"created": "Thu, 5 Dec 2019 23:41:03 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Apr 2020 19:42:43 GMT",
"version": "v2"
}
] | 2020-04-03 | [
[
"Shoshany",
"Barak",
""
]
] | We perform a rigorous piecewise-flat discretization of classical general relativity in the first-order formulation, in both 2+1 and 3+1 dimensions, carefully keeping track of curvature and torsion via holonomies. We show that the resulting phase space is precisely that of spin networks, the quantum states of discrete s... |
1004.4537 | Salvatore Vitale | Salvatore Vitale and Michele Zanolin | Parameter estimation from Gravitational waves generated by non-spinning
binary black holes with laser interferometers: beyond the Fisher information | null | Phys.Rev.D82:124065,2010 | 10.1103/PhysRevD.82.124065 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we apply to gravitational waves from non-spinning binary
systems a recently intro- duced frequentist methodology to calculate
analytically the error for a maximum likelihood estimate (MLE) of physical
parameters. While existing literature focuses on using the Cramer Rao Lower
bound (CRLB) and Monte Carl... | [
{
"created": "Mon, 26 Apr 2010 14:23:15 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Jun 2010 07:43:24 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Jun 2010 13:43:04 GMT",
"version": "v3"
},
{
"created": "Tue, 2 Nov 2010 10:16:50 GMT",
"version": "v4"
},
{
"cr... | 2011-02-02 | [
[
"Vitale",
"Salvatore",
""
],
[
"Zanolin",
"Michele",
""
]
] | In this paper we apply to gravitational waves from non-spinning binary systems a recently intro- duced frequentist methodology to calculate analytically the error for a maximum likelihood estimate (MLE) of physical parameters. While existing literature focuses on using the Cramer Rao Lower bound (CRLB) and Monte Carlo ... |
1505.06546 | Fangyu Li | Fangyu Li and Hao Wen and Zhenyun Fang and Lianfu Wei and Yiwen Wang
and Miao Zhang | Quasi-B-mode generated by high-frequency gravitational waves and
corresponding perturbative photon fluxes | 22 pages, 6 figures, research article | Nuclear Physics B 911 (2016) 500-516 | 10.1016/j.nuclphysb.2016.08.009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Interaction of very low-frequency primordial(relic) gravitational waves(GWs)
to cosmic microwave background(CMB) can generate B-mode polarization. Here, for
the first time we point out that the electromagnetic(EM) response to
high-frequency GWs(HFGWs) would produce quasi-B-mode distribution of the
perturbative photon... | [
{
"created": "Mon, 25 May 2015 05:51:34 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jun 2015 07:20:31 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Oct 2015 03:29:53 GMT",
"version": "v3"
},
{
"created": "Tue, 11 Oct 2016 17:13:59 GMT",
"version": "v4"
},
{
"cr... | 2017-04-18 | [
[
"Li",
"Fangyu",
""
],
[
"Wen",
"Hao",
""
],
[
"Fang",
"Zhenyun",
""
],
[
"Wei",
"Lianfu",
""
],
[
"Wang",
"Yiwen",
""
],
[
"Zhang",
"Miao",
""
]
] | Interaction of very low-frequency primordial(relic) gravitational waves(GWs) to cosmic microwave background(CMB) can generate B-mode polarization. Here, for the first time we point out that the electromagnetic(EM) response to high-frequency GWs(HFGWs) would produce quasi-B-mode distribution of the perturbative photon f... |
2007.02666 | Ramil Izmailov N | K.K. Nandi, R.N. Izmailov, G.M. Garipova, R.R. Volotskova and A.A.
Potapov | On the Hoop conjecture in Einstein gravity coupled to nonlinear
electrodynamics | 7 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The famous hoop conjecture by Thorne has been claimed to be\ violated in
curved spacetimes coupled to linear electrodynamics. Hod \cite{Hod:2018} has
recently refuted this claim by clarifying the status and validity of the
conjecture appropriately interpreting the gravitational mass parameter $M$.
However, it turns o... | [
{
"created": "Mon, 6 Jul 2020 11:55:00 GMT",
"version": "v1"
}
] | 2020-07-07 | [
[
"Nandi",
"K. K.",
""
],
[
"Izmailov",
"R. N.",
""
],
[
"Garipova",
"G. M.",
""
],
[
"Volotskova",
"R. R.",
""
],
[
"Potapov",
"A. A.",
""
]
] | The famous hoop conjecture by Thorne has been claimed to be\ violated in curved spacetimes coupled to linear electrodynamics. Hod \cite{Hod:2018} has recently refuted this claim by clarifying the status and validity of the conjecture appropriately interpreting the gravitational mass parameter $M$. However, it turns out... |
2103.05490 | Timothy Anson | Timothy Anson, Eugeny Babichev and Christos Charmousis | Deformed black hole in Sagittarius A | 24 pages, 1 figure; v3: reference added, matches published version | Phys. Rev. D 103, 124035 (2021) | 10.1103/PhysRevD.103.124035 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the post-Newtonian orbit of stars around a deformed Kerr black
hole. The deformation we consider is a class of disformal transformations of a
nontrivial Kerr solution in scalar-tensor theory which are labeled via the
disformal parameter $D$. We study different limits of the disformal parameter,
and compare... | [
{
"created": "Tue, 9 Mar 2021 15:24:16 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Mar 2021 11:42:14 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Jun 2021 15:40:13 GMT",
"version": "v3"
}
] | 2021-06-15 | [
[
"Anson",
"Timothy",
""
],
[
"Babichev",
"Eugeny",
""
],
[
"Charmousis",
"Christos",
""
]
] | We analyze the post-Newtonian orbit of stars around a deformed Kerr black hole. The deformation we consider is a class of disformal transformations of a nontrivial Kerr solution in scalar-tensor theory which are labeled via the disformal parameter $D$. We study different limits of the disformal parameter, and compare t... |
1604.01396 | Macarena Lagos | Macarena Lagos, Tessa Baker, Pedro G. Ferreira, Johannes Noller | A general theory of linear cosmological perturbations: scalar-tensor and
vector-tensor theories | Two code packages (xIST and COPPER) are published with this paper and
can be downloaded from https://github.com/noller/xIST. Final version with
minor changes | null | 10.1088/1475-7516/2016/08/007 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a method for parametrizing linear cosmological perturbations of
theories of gravity, around homogeneous and isotropic backgrounds. The method
is sufficiently general and systematic that it can be applied to theories with
any degrees of freedom (DoFs) and arbitrary gauge symmetries. In this paper, we
focus ... | [
{
"created": "Tue, 5 Apr 2016 15:10:33 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2016 10:19:10 GMT",
"version": "v2"
}
] | 2016-08-17 | [
[
"Lagos",
"Macarena",
""
],
[
"Baker",
"Tessa",
""
],
[
"Ferreira",
"Pedro G.",
""
],
[
"Noller",
"Johannes",
""
]
] | We present a method for parametrizing linear cosmological perturbations of theories of gravity, around homogeneous and isotropic backgrounds. The method is sufficiently general and systematic that it can be applied to theories with any degrees of freedom (DoFs) and arbitrary gauge symmetries. In this paper, we focus on... |
2011.12969 | Christian Pfeifer | Sjors Heefer and Christian Pfeifer and Andrea Fuster | Randers pp-waves | 11 pagers, updated to journal version | Phys. Rev. D 104, 024007 (2021) | 10.1103/PhysRevD.104.024007 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study Randers spacetimes of Berwald type and analyze Pfeifer
and Wohlfarth's vacuum field equation of Finsler gravity for this class. We
show that in this case the field equation is equivalent to the vanishing of the
Finsler Ricci tensor, analogously to Einstein gravity. This implies that the
consider... | [
{
"created": "Wed, 25 Nov 2020 19:00:02 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jul 2021 14:38:23 GMT",
"version": "v2"
},
{
"created": "Fri, 19 May 2023 11:58:56 GMT",
"version": "v3"
}
] | 2023-05-22 | [
[
"Heefer",
"Sjors",
""
],
[
"Pfeifer",
"Christian",
""
],
[
"Fuster",
"Andrea",
""
]
] | In this work we study Randers spacetimes of Berwald type and analyze Pfeifer and Wohlfarth's vacuum field equation of Finsler gravity for this class. We show that in this case the field equation is equivalent to the vanishing of the Finsler Ricci tensor, analogously to Einstein gravity. This implies that the considered... |
1611.02789 | Jian-Yang Zhu | Zhi-Peng Peng, Jia-Ning Yu, Xiao-Min Zhang and Jian-Yang Zhu | Consistency of warm k-inflation | 8 pages. Accepted for publication as a Regular Article in Physical
Review D | Phys. Rev. D 94, 103531 (2016) | 10.1103/PhysRevD.94.103531 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the k-inflation which is a type of kinetically driven inflationary
model under the standard inflationary scenario to a possible warm inflationary
scenario. The dynamical equations of this warm k-inflation model are obtained.
We rewrite the slow-roll parameters which are different from the usual
potential dr... | [
{
"created": "Wed, 9 Nov 2016 01:14:26 GMT",
"version": "v1"
}
] | 2016-12-06 | [
[
"Peng",
"Zhi-Peng",
""
],
[
"Yu",
"Jia-Ning",
""
],
[
"Zhang",
"Xiao-Min",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | We extend the k-inflation which is a type of kinetically driven inflationary model under the standard inflationary scenario to a possible warm inflationary scenario. The dynamical equations of this warm k-inflation model are obtained. We rewrite the slow-roll parameters which are different from the usual potential driv... |
gr-qc/0602029 | Filimonova Irina V | S.S. Gershtein, A.A. Logunov and M.A.Mestvirishvili | Self-restriction of Gravitational Field and its Role in the Universe | 52 p | null | null | null | gr-qc | null | It is shown in the article that according to the Relativistic Theory of
Gravitation the gravitational field providing slowing down of the time rate
nevertheless stops itself this slowing down in strong fields. So a physical
tendency of this field to self-restriction of the gravitational potential is
demonstrated. Thi... | [
{
"created": "Wed, 8 Feb 2006 10:18:53 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Feb 2006 12:22:52 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Gershtein",
"S. S.",
""
],
[
"Logunov",
"A. A.",
""
],
[
"Mestvirishvili",
"M. A.",
""
]
] | It is shown in the article that according to the Relativistic Theory of Gravitation the gravitational field providing slowing down of the time rate nevertheless stops itself this slowing down in strong fields. So a physical tendency of this field to self-restriction of the gravitational potential is demonstrated. This ... |
1011.2881 | Pavel Krtous | Jindrich Dolansky, Pavel Krtous | Billiard in the space with a time machine | 13 pages, 16 figures | Phys.Rev.D82:124056,2010 | 10.1103/PhysRevD.82.124056 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a system of an elastic ball moving in the non-relativistic spacetime
with a nontrivial causal structure produced by a wormhole-based time machine.
For such a system it is possible to formulate a simple model of the so-called
`grandfather paradox': for certain `paradoxical' initial conditions the
standard str... | [
{
"created": "Fri, 12 Nov 2010 11:22:10 GMT",
"version": "v1"
}
] | 2011-01-20 | [
[
"Dolansky",
"Jindrich",
""
],
[
"Krtous",
"Pavel",
""
]
] | We study a system of an elastic ball moving in the non-relativistic spacetime with a nontrivial causal structure produced by a wormhole-based time machine. For such a system it is possible to formulate a simple model of the so-called `grandfather paradox': for certain `paradoxical' initial conditions the standard strai... |
gr-qc/0503115 | Xu Lixin | Feng Luo, Hongya Liu | Brane Formation and Cosmological Constraint on the Number of Extra
Dimensions | 11 pages, no figures. To appear in IJTP | Int.J.Theor.Phys. 44 (2005) 1441-1450 | 10.1007/s10773-005-4778-2 | null | gr-qc astro-ph hep-th | null | Special relativity is generalized to extra dimensions and quantized energy
levels of particles are obtained. By calculating the probability of particles'
motion in extra dimensions at high temperature of the early universe, it is
proposed that the branes may have not existed since the very beginning of the
universe, ... | [
{
"created": "Wed, 30 Mar 2005 00:27:41 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Luo",
"Feng",
""
],
[
"Liu",
"Hongya",
""
]
] | Special relativity is generalized to extra dimensions and quantized energy levels of particles are obtained. By calculating the probability of particles' motion in extra dimensions at high temperature of the early universe, it is proposed that the branes may have not existed since the very beginning of the universe, bu... |
gr-qc/9707009 | Hans Kastrup | H.A. Kastrup (RWTH Aachen) | Canonical Quantum Statistics of an Isolated Schwarzschild Black Hole
with a Spectrum E_n = sigma sqrt{n} E_P | 14 pages, LaTeX A brief note added which refers to previous work
where the imaginary part of the partition function is related to metastable
states of the system | Phys.Lett. B413 (1997) 267-273 | 10.1016/S0370-2693(97)01121-0 | PITHA 97/18 | gr-qc hep-th | null | Many authors - beginning with Bekenstein - have suggested that the energy
levels E_n of a quantized isolated Schwarzschild black hole have the form E_n =
sigma sqrt{n} E_P, n=1,2,..., sigma =O(1), with degeneracies g^n. In the
present paper properties of a system with such a spectrum, considered as a
quantum canonica... | [
{
"created": "Thu, 3 Jul 1997 18:51:08 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Aug 1997 14:20:09 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Kastrup",
"H. A.",
"",
"RWTH Aachen"
]
] | Many authors - beginning with Bekenstein - have suggested that the energy levels E_n of a quantized isolated Schwarzschild black hole have the form E_n = sigma sqrt{n} E_P, n=1,2,..., sigma =O(1), with degeneracies g^n. In the present paper properties of a system with such a spectrum, considered as a quantum canonical ... |
2211.17065 | Leihua Liu | Ke Gao, Lei-Hua Liu, Mian Zhu | Microlensing effects of wormholes associated to blackhole spacetimes | Match the publication version | Phys.Dark Univ. 41 (2023) 101254 | 10.1016/j.dark.2023.101254 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate the microlensing effects of wormholes
associated to black hole spacetimes. Specifically, we work on three typical
wormholes (WH): Schwarzschild WH, Kerr WH, and RN WH, as well as their
blackhole correspondences. We evaluate the deflection angle upon the second
order under weak field appr... | [
{
"created": "Wed, 30 Nov 2022 15:17:31 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Dec 2022 15:42:59 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Feb 2023 14:17:34 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Jun 2023 12:56:05 GMT",
"version": "v4"
}
] | 2023-06-09 | [
[
"Gao",
"Ke",
""
],
[
"Liu",
"Lei-Hua",
""
],
[
"Zhu",
"Mian",
""
]
] | In this paper, we investigate the microlensing effects of wormholes associated to black hole spacetimes. Specifically, we work on three typical wormholes (WH): Schwarzschild WH, Kerr WH, and RN WH, as well as their blackhole correspondences. We evaluate the deflection angle upon the second order under weak field approx... |
1101.3168 | Torsten Asselmeyer-Maluga | T. Asselmeyer-Maluga and C.H. Brans | Gravitational sources induced by exotic smoothness | 17 pages, 8 figures, 5 appendices | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct a coordinate atlas in an exotic $\mathbb{R}^{4}$
using Bizaca's construction. The main source for such an atlas is the handle
body decomposition of a Casson handle, which of course is an infinite, but
periodic, process. The immersion of the end-periodic manifold into
$\mathbb{R}^{4}$ is dir... | [
{
"created": "Mon, 17 Jan 2011 10:18:13 GMT",
"version": "v1"
}
] | 2011-01-18 | [
[
"Asselmeyer-Maluga",
"T.",
""
],
[
"Brans",
"C. H.",
""
]
] | In this paper we construct a coordinate atlas in an exotic $\mathbb{R}^{4}$ using Bizaca's construction. The main source for such an atlas is the handle body decomposition of a Casson handle, which of course is an infinite, but periodic, process. The immersion of the end-periodic manifold into $\mathbb{R}^{4}$ is direc... |
gr-qc/0604061 | Dmitriy Pak | Sang-Woo Kim, D.G. Pak | Torsion as a dynamic degree of freedom of quantum gravity | 13 pages, reduced final version | Class.Quant.Grav.25:065011,2008 | 10.1088/0264-9381/25/6/065011 | SNUTP-06-009 | gr-qc | null | The gauge approach to gravity based on the local Lorentz group with a general
independent affine connection A_{\mu cd} is developed. We consider SO(1,3)
gauge theory with a Lagrangian quadratic in curvature as a simple model of
quantum gravity. The torsion is proposed to represent a dynamic degree of
freedom of quant... | [
{
"created": "Thu, 13 Apr 2006 12:20:10 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jul 2006 07:09:21 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Mar 2008 06:19:18 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Kim",
"Sang-Woo",
""
],
[
"Pak",
"D. G.",
""
]
] | The gauge approach to gravity based on the local Lorentz group with a general independent affine connection A_{\mu cd} is developed. We consider SO(1,3) gauge theory with a Lagrangian quadratic in curvature as a simple model of quantum gravity. The torsion is proposed to represent a dynamic degree of freedom of quantum... |
1501.01174 | Chiara Caprini | Chiara Caprini | Stochastic background of gravitational waves from cosmological sources | Proceedings of LISA Symposium X, accepted for publication in Journal
of Physics: Conference Series. Typos corrected, two references added | null | 10.1088/1742-6596/610/1/012004 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves (GW) can constitute a unique probe of the primordial
universe. In many cases, the characteristic frequency of the emitted GW is
directly related to the energy scale at which the GW source is operating in the
early universe. Consequently, different GW detectors can probe different energy
scales in ... | [
{
"created": "Tue, 6 Jan 2015 13:36:50 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Jan 2015 14:02:18 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Caprini",
"Chiara",
""
]
] | Gravitational waves (GW) can constitute a unique probe of the primordial universe. In many cases, the characteristic frequency of the emitted GW is directly related to the energy scale at which the GW source is operating in the early universe. Consequently, different GW detectors can probe different energy scales in th... |
1503.04698 | Christof Wetterich | C. Wetterich | Can observations look back to the beginning of inflation? | additional example and references, 5 pages | null | 10.1016/j.physletb.2016.01.027 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmic microwave background can measure the inflaton potential only if
inflation lasts sufficiently long before the time of horizon crossing of
observable fluctuations, such that non-linear effects in the time evolution of
Green's functions lead to a loss of memory of initial conditions for the
ultraviolet tail o... | [
{
"created": "Mon, 16 Mar 2015 15:59:08 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Sep 2015 12:32:47 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Jan 2016 10:41:12 GMT",
"version": "v3"
}
] | 2016-01-20 | [
[
"Wetterich",
"C.",
""
]
] | The cosmic microwave background can measure the inflaton potential only if inflation lasts sufficiently long before the time of horizon crossing of observable fluctuations, such that non-linear effects in the time evolution of Green's functions lead to a loss of memory of initial conditions for the ultraviolet tail of ... |
0708.1396 | Jonn Miritzis | J. Miritzis | Oscillatory behavior of closed isotropic models in second order gravity
theory | 16 pages, 3 figures. With some minor improvements. To appear in
General Relativity and Gravitation | Gen.Rel.Grav.41:49-65,2009 | 10.1007/s10714-008-0651-3 | null | gr-qc | null | Homogeneous and isotropic models are studied in the Jordan frame of the
second order gravity theory. The late time evolution of the models is analysed
with the methods of the dynamical systems. The normal form of the dynamical
system has periodic solutions for a large set of initial conditions. This
implies that an i... | [
{
"created": "Fri, 10 Aug 2007 10:33:22 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Mar 2008 09:09:28 GMT",
"version": "v2"
}
] | 2009-01-16 | [
[
"Miritzis",
"J.",
""
]
] | Homogeneous and isotropic models are studied in the Jordan frame of the second order gravity theory. The late time evolution of the models is analysed with the methods of the dynamical systems. The normal form of the dynamical system has periodic solutions for a large set of initial conditions. This implies that an ini... |
1107.1830 | Michael Hohensee | Michael A. Hohensee and Holger Mueller | Significance of the Compton frequency in atom interferometry | Submitted to the Proceedings of the 46th Rencontres de Moriond.
Gravitational Waves and Experimental Gravity. 20-27 March 2011, La Thuile,
Aosta valley, Italy | null | null | null | gr-qc hep-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent realization that atom interferometers (AIs) can be used to test
the gravitational redshift tests has proven to be controversial in some
quarters. Here, we address the issues raised against the interpretation of AIs
as redshift tests, reaffirming the fact that Mueller et al. [Nature 463, 926
(2010)] indeed ... | [
{
"created": "Sun, 10 Jul 2011 04:08:58 GMT",
"version": "v1"
}
] | 2011-07-12 | [
[
"Hohensee",
"Michael A.",
""
],
[
"Mueller",
"Holger",
""
]
] | The recent realization that atom interferometers (AIs) can be used to test the gravitational redshift tests has proven to be controversial in some quarters. Here, we address the issues raised against the interpretation of AIs as redshift tests, reaffirming the fact that Mueller et al. [Nature 463, 926 (2010)] indeed re... |
1010.3589 | Hossein Farajollahi | Hossein Farajollahi, Amin Salehi | Attractors, Statefinders and Observational Measurement for Chameleonic
Brans--Dicke Cosmology | 28 pages, 38 figures | JCAP 1011:006,2010 | 10.1088/1475-7516/2010/11/006 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate chameleonic Brans--Dicke model applied to the FRW universes. A
framework to study stability and attractor solutions in the phase space is
developed for the model. We show that depending on the matter field and
stability conditions, it is possible to realize phantom-like behavior without
introducing pha... | [
{
"created": "Mon, 18 Oct 2010 13:15:52 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Oct 2010 01:08:55 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Nov 2010 05:29:43 GMT",
"version": "v3"
},
{
"created": "Wed, 8 Jun 2011 07:05:36 GMT",
"version": "v4"
}
] | 2011-06-09 | [
[
"Farajollahi",
"Hossein",
""
],
[
"Salehi",
"Amin",
""
]
] | We investigate chameleonic Brans--Dicke model applied to the FRW universes. A framework to study stability and attractor solutions in the phase space is developed for the model. We show that depending on the matter field and stability conditions, it is possible to realize phantom-like behavior without introducing phant... |
2202.10063 | Simone Albanesi | Simone Albanesi, Alessandro Nagar, Sebastiano Bernuzzi, Andrea
Placidi, and Marta Orselli | Assessment of Effective-One-Body Radiation Reactions for Generic Planar
Orbits | 23 pages, 15 figures, Phys. Rev. D 105, 104031 | null | 10.1103/PhysRevD.105.104031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we assess the performances of different analytical
prescriptions for the effective-one-body (EOB) radiation reaction along generic
planar orbits using exact numerical result in the test-mass limit. We consider
three prescriptions put forward in the recent literature: (i) the quasicircular
prescription (... | [
{
"created": "Mon, 21 Feb 2022 09:23:01 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2022 10:51:51 GMT",
"version": "v2"
}
] | 2022-05-20 | [
[
"Albanesi",
"Simone",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Placidi",
"Andrea",
""
],
[
"Orselli",
"Marta",
""
]
] | In this paper we assess the performances of different analytical prescriptions for the effective-one-body (EOB) radiation reaction along generic planar orbits using exact numerical result in the test-mass limit. We consider three prescriptions put forward in the recent literature: (i) the quasicircular prescription (QC... |
gr-qc/9703077 | Claus Laemmerzahl | Reinhard Meinel | The rigidly rotating disk of dust and its black hole limit | 14 pages, LaTex, includes 1 figure, To appear in A.Garcia et al.
(eds.): Recent Developments in Gravitation and Mathematical Physics,
Proceedings of the 2nd Mexican School | A. Garcia et al. (eds.): Recent Developments in Gravitation and
Mathematical Physics, Science Network Publishing, Konstanz 1998 | null | null | gr-qc | null | The exact global solution of the Einstein equations [Neugebauer & Meinel,
Phys. Rev. Lett. 75 (1995) 3046] describing a rigidly rotating,
self-gravitating disk is discussed. The underlying matter model is a perfect
fluid in the limit of vanishing pressure. The solution represents the
general-relativistic analogue of ... | [
{
"created": "Wed, 26 Mar 1997 12:24:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Meinel",
"Reinhard",
""
]
] | The exact global solution of the Einstein equations [Neugebauer & Meinel, Phys. Rev. Lett. 75 (1995) 3046] describing a rigidly rotating, self-gravitating disk is discussed. The underlying matter model is a perfect fluid in the limit of vanishing pressure. The solution represents the general-relativistic analogue of th... |
0905.2010 | J. Ponce de Leon | J. Ponce de Leon | Effective spacetime from multi-dimensional gravity | A typo in Eq. (24) is fixed | Grav.Cosmol.15:345-352,2009 | 10.1134/S0202289309040100 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effective spacetimes in lower dimensions that can be extracted
from a multidimensional generalization of the Schwarzschild-Tangherlini
spacetimes derived by Fadeev, Ivashchuk and Melnikov ({\it Phys. Lett,} {\bf A
161} (1991) 98). The higher-dimensional spacetime has $D = (4 + n + m)$
dimensions, where $... | [
{
"created": "Wed, 13 May 2009 04:24:08 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Nov 2009 07:27:00 GMT",
"version": "v2"
}
] | 2010-04-14 | [
[
"de Leon",
"J. Ponce",
""
]
] | We study the effective spacetimes in lower dimensions that can be extracted from a multidimensional generalization of the Schwarzschild-Tangherlini spacetimes derived by Fadeev, Ivashchuk and Melnikov ({\it Phys. Lett,} {\bf A 161} (1991) 98). The higher-dimensional spacetime has $D = (4 + n + m)$ dimensions, where $n$... |
0804.0874 | David Maxwell | David Maxwell | A class of solutions of the vacuum Einstein constraint equations with
freely specified mean curvature | 21 pages | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a sufficient condition, with no restrictions on the mean curvature,
under which the conformal method can be used to generate solutions of the
vacuum Einstein constraint equations on compact manifolds. The condition
requires a so-called global supersolution but does not require a global
subsolution. As a conse... | [
{
"created": "Sat, 5 Apr 2008 21:59:18 GMT",
"version": "v1"
}
] | 2008-04-08 | [
[
"Maxwell",
"David",
""
]
] | We give a sufficient condition, with no restrictions on the mean curvature, under which the conformal method can be used to generate solutions of the vacuum Einstein constraint equations on compact manifolds. The condition requires a so-called global supersolution but does not require a global subsolution. As a consequ... |
gr-qc/9903057 | L. L. Salcedo | L. L. Salcedo | On the uniqueness of the expected stress-energy tensor in renormalizable
field theories | RevTex, 4 pages, no figures. Minor additions and title changed. To
appear in Physical Review D | Phys.Rev. D60 (1999) 107502 | 10.1103/PhysRevD.60.107502 | ugr-dfm-5/98 | gr-qc hep-th | null | It is argued that the ambiguity introduced by the renormalization in the
effective action of a four-dimensional renormalizable quantum field theory is
at most a local polynomial action of canonical dimension four. The allowed
ambiguity in the expected stress-energy tensor of a massive scalar field is
severely restric... | [
{
"created": "Mon, 15 Mar 1999 11:52:17 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Sep 1999 14:20:21 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Salcedo",
"L. L.",
""
]
] | It is argued that the ambiguity introduced by the renormalization in the effective action of a four-dimensional renormalizable quantum field theory is at most a local polynomial action of canonical dimension four. The allowed ambiguity in the expected stress-energy tensor of a massive scalar field is severely restricte... |
2407.20131 | Emanuele Berti | Yiqiu Yang, Zhan-Feng Mai, Run-Qiu Yang, Lijing Shao, Emanuele Berti | Spectral instability of black holes: relating the frequency domain to
the time domain | 18 pages, 8 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent work has shown that the quasinormal mode spectrum of black holes is
unstable under small perturbations (of order $\epsilon$) of the radial
potential, while the early time-domain ringdown waveform is only marginally
affected. In this paper we provide further insight into the apparent tension
between the frequen... | [
{
"created": "Mon, 29 Jul 2024 16:00:04 GMT",
"version": "v1"
}
] | 2024-07-30 | [
[
"Yang",
"Yiqiu",
""
],
[
"Mai",
"Zhan-Feng",
""
],
[
"Yang",
"Run-Qiu",
""
],
[
"Shao",
"Lijing",
""
],
[
"Berti",
"Emanuele",
""
]
] | Recent work has shown that the quasinormal mode spectrum of black holes is unstable under small perturbations (of order $\epsilon$) of the radial potential, while the early time-domain ringdown waveform is only marginally affected. In this paper we provide further insight into the apparent tension between the frequency... |
2306.04661 | Jose Tarciso Junior | Jos\'e Tarciso S. S. Junior and Manuel E. Rodrigues | Coincident f(Q) gravity: black holes, regular black holes and black
bounces | 30 pages, 1 figure | The European Physical Journal C 83, 475 (2023) | 10.1140/epjc/s10052-023-11660-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we will use the coincident gauge to investigate new solutions
of the f(Q) theory applied in the context of black holes, regular black holes,
and the black-bounce spacetime. For each of these approaches, we compute the
linear solutions and the solutions with the constraint that the non-metricity
scalar ... | [
{
"created": "Wed, 7 Jun 2023 02:17:47 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jun 2023 16:50:55 GMT",
"version": "v2"
}
] | 2023-06-14 | [
[
"Junior",
"José Tarciso S. S.",
""
],
[
"Rodrigues",
"Manuel E.",
""
]
] | In this paper, we will use the coincident gauge to investigate new solutions of the f(Q) theory applied in the context of black holes, regular black holes, and the black-bounce spacetime. For each of these approaches, we compute the linear solutions and the solutions with the constraint that the non-metricity scalar is... |
1803.07965 | Tim Dietrich | Tim Dietrich, Sebastiano Bernuzzi, Bernd Bruegmann, Wolfgang Tichy | High-resolution numerical relativity simulations of spinning binary
neutron star mergers | published as proceeding for the 26th Euromicro International
Conference on Parallel, Distributed, and Network-Based Processing. PDP 2018
IEEE Catalog Number: CFP18169 | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent detection of gravitational waves and electromagnetic counterparts
emitted during and after the collision of two neutron stars marks a
breakthrough in the field of multi-messenger astronomy. Numerical relativity
simulations are the only tool to describe the binary's merger dynamics in the
regime when speeds... | [
{
"created": "Wed, 21 Mar 2018 15:28:55 GMT",
"version": "v1"
}
] | 2018-03-22 | [
[
"Dietrich",
"Tim",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Tichy",
"Wolfgang",
""
]
] | The recent detection of gravitational waves and electromagnetic counterparts emitted during and after the collision of two neutron stars marks a breakthrough in the field of multi-messenger astronomy. Numerical relativity simulations are the only tool to describe the binary's merger dynamics in the regime when speeds a... |
gr-qc/0107078 | Pavel Krtous | Jiri Bicak and Pavel Krtous | Accelerated sources in de Sitter spacetime and the insufficiency of
retarded fields | 36 pages, 5 figures, LaTex2e; minor misprints corrected, one
reference added and some terminology changed | Phys.Rev.D64:124020,2001 | 10.1103/PhysRevD.64.124020 | null | gr-qc | null | The scalar and electromagnetic fields produced by the geodesic and uniformly
accelerated discrete charges in de Sitter spacetime are constructed by
employing the conformal relation between de Sitter and Minkowski space.
A special attention is paid to new effects arising in spacetimes which, like
de Sitter space, ha... | [
{
"created": "Tue, 24 Jul 2001 12:29:21 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Feb 2002 20:12:56 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Bicak",
"Jiri",
""
],
[
"Krtous",
"Pavel",
""
]
] | The scalar and electromagnetic fields produced by the geodesic and uniformly accelerated discrete charges in de Sitter spacetime are constructed by employing the conformal relation between de Sitter and Minkowski space. A special attention is paid to new effects arising in spacetimes which, like de Sitter space, have s... |
2403.11770 | Jinbo Yang | Xiao-Ping Rao, Hyat Huang and Jinbo Yang | Hairy Black Holes with Arbitrary Small Areas | 26 pages, 7 figures and 1 table. Comments are welcome | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtained new hairy black hole solutions in Einstein-scalar theory,
including asymptotic flat, de Sitter and anti-de Sitter black holes. The theory
is inspired by Ref. [1], where traversable wormhole solutions from an
Einstein-phantom scalar theory are constructed. In this work, we found new
black hole solutions in... | [
{
"created": "Mon, 18 Mar 2024 13:28:54 GMT",
"version": "v1"
}
] | 2024-03-19 | [
[
"Rao",
"Xiao-Ping",
""
],
[
"Huang",
"Hyat",
""
],
[
"Yang",
"Jinbo",
""
]
] | We obtained new hairy black hole solutions in Einstein-scalar theory, including asymptotic flat, de Sitter and anti-de Sitter black holes. The theory is inspired by Ref. [1], where traversable wormhole solutions from an Einstein-phantom scalar theory are constructed. In this work, we found new black hole solutions in a... |
2005.05130 | Lokesh Mishra | Lokesh Mishra | Theories of Massive Gravity in 2+1 Dimensions | MScThesis (154 pages, University of Freiburg) (v2 same as v1; removed
obsolete tex pakages) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis is dedicated to the study of theories of massive gravity. The
formulation of higher spin gauge field theories, along with a Chern-Simons (CS)
like term for fields of higher spins is presented. Through this setup, general
features of theories describing massless/massive fields of higher spin in
arbitrary d... | [
{
"created": "Fri, 8 May 2020 12:42:03 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Jan 2021 16:11:11 GMT",
"version": "v2"
}
] | 2021-01-26 | [
[
"Mishra",
"Lokesh",
""
]
] | This thesis is dedicated to the study of theories of massive gravity. The formulation of higher spin gauge field theories, along with a Chern-Simons (CS) like term for fields of higher spins is presented. Through this setup, general features of theories describing massless/massive fields of higher spin in arbitrary dim... |
2205.06534 | Michel Duneau | Michel Duneau | Weyl locally integrable conformal gravity, rotation curves and cosmic
filaments | 12 pages, 8 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Weyl's conformal theory of gravity is an extension of Einstein's theory of
general relativity which associates metrics with 1-forms . In the case of
locally integrable (closed non-exact) 1-forms the spacetime manifolds are no
more simply connected. The Weil connections yield curvature tensors which
satisfy the basic ... | [
{
"created": "Fri, 13 May 2022 09:46:01 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jun 2022 08:25:33 GMT",
"version": "v2"
}
] | 2022-06-09 | [
[
"Duneau",
"Michel",
""
]
] | Weyl's conformal theory of gravity is an extension of Einstein's theory of general relativity which associates metrics with 1-forms . In the case of locally integrable (closed non-exact) 1-forms the spacetime manifolds are no more simply connected. The Weil connections yield curvature tensors which satisfy the basic pr... |
gr-qc/0612002 | Gonzalo Olmo | Gonzalo J. Olmo | Violation of the Equivalence Principle in Modified Theories of Gravity | 4 pages, references and small comments added, to appear in
Phys.Rev.Lett | Phys.Rev.Lett.98:061101,2007 | 10.1103/PhysRevLett.98.061101 | null | gr-qc astro-ph hep-th | null | We study modified theories of gravity of the f(R) type in Palatini formalism.
For a generic f(R) lagrangian, we show that the metric can be solved as the
product of a scalar function times a rank-two tensor (or auxiliary metric). The
scalar function is sensitive to the local energy-momentum density. The
auxiliary met... | [
{
"created": "Thu, 30 Nov 2006 21:51:21 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jan 2007 10:35:43 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Olmo",
"Gonzalo J.",
""
]
] | We study modified theories of gravity of the f(R) type in Palatini formalism. For a generic f(R) lagrangian, we show that the metric can be solved as the product of a scalar function times a rank-two tensor (or auxiliary metric). The scalar function is sensitive to the local energy-momentum density. The auxiliary metri... |
gr-qc/0406030 | Albert V. Minkevich | Albert V. Minkevich | Non-Singular Cosmology and Gauge Theories of Gravitation | LaTeX2e, 16 pages | null | 10.1142/9789812702296_0003 | null | gr-qc | null | The resolution of the problem of cosmological singularity in the framework of
gauge theories of gravitation is discussed. Generalized cosmological Friedmann
equations for homogeneous isotropic models filled by interacting scalar fields
and usual gravitating matter are deduced. It is shown that generic feature of
cosm... | [
{
"created": "Tue, 8 Jun 2004 15:25:48 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Minkevich",
"Albert V.",
""
]
] | The resolution of the problem of cosmological singularity in the framework of gauge theories of gravitation is discussed. Generalized cosmological Friedmann equations for homogeneous isotropic models filled by interacting scalar fields and usual gravitating matter are deduced. It is shown that generic feature of cosmol... |
gr-qc/0701075 | Hamid Reza Sepangi | B. Vakili, N. Khosravi and H. R. Sepangi | Bianchi spacetimes in noncommutative phase-space | 19 pages, 2 figures, to appear in Class. Quantum Grav | Class.Quant.Grav.24:931-949,2007 | 10.1088/0264-9381/24/4/013 | null | gr-qc | null | The effects of noncommutativity in the phase-space of the classical and
quantum cosmology of Bianchi models are investigated. Exact solutions in both
commutative and noncommutative cases are presented and compared. Further, the
Noether symmetries of the Bianchi class A spacetimes are studied in both cases
and similar... | [
{
"created": "Sun, 14 Jan 2007 15:21:57 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Vakili",
"B.",
""
],
[
"Khosravi",
"N.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | The effects of noncommutativity in the phase-space of the classical and quantum cosmology of Bianchi models are investigated. Exact solutions in both commutative and noncommutative cases are presented and compared. Further, the Noether symmetries of the Bianchi class A spacetimes are studied in both cases and similarit... |
2107.01487 | Lili He | Lili He, Hans Lindblad | Masses at null infinity for Einstein's equations in harmonic coordinates | 31 pages. Added references. Typo corrected | null | null | null | gr-qc math-ph math.AP math.MP | http://creativecommons.org/licenses/by/4.0/ | In this work we give a complete picture of how to in a direct simple way
define the mass at null infinity in harmonic coordinates in three different
ways that we show satisfy the Bondi mass loss law. The first and second way
involve only the limit of metric (Trautman mass) respectively the null second
fundamental for... | [
{
"created": "Sat, 3 Jul 2021 20:01:13 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Apr 2022 19:07:18 GMT",
"version": "v2"
}
] | 2022-04-20 | [
[
"He",
"Lili",
""
],
[
"Lindblad",
"Hans",
""
]
] | In this work we give a complete picture of how to in a direct simple way define the mass at null infinity in harmonic coordinates in three different ways that we show satisfy the Bondi mass loss law. The first and second way involve only the limit of metric (Trautman mass) respectively the null second fundamental forms... |
gr-qc/0110114 | Stefan Davids | Stefan Davids | A State Sum Model for (2+1) Lorentzian Quantum Gravity | 129 pages | null | null | null | gr-qc | null | A state sum model based on the group SU(1,1) is defined. Investigations of
its geometry and asymptotics suggest it is a good candidate for modelling (2+1)
Lorentzian quantum gravity.
| [
{
"created": "Fri, 26 Oct 2001 16:55:18 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Davids",
"Stefan",
""
]
] | A state sum model based on the group SU(1,1) is defined. Investigations of its geometry and asymptotics suggest it is a good candidate for modelling (2+1) Lorentzian quantum gravity. |
2406.08078 | Reggie Pantig | Nikko John Leo S. Lobos, Anele M. Ncube, Reggie C. Pantig, and Alan S.
Cornell | Analyzing the effect of higher dimensions on the black hole silhouette,
deflection angles, and PINN approximated quasinormal modes | 16 pages, 13 figures, 2 tables. Comments are welcome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the impact of higher dimensions on the properties of
Schwarzschild-Tangherlini black holes, focusing on the photonsphere, black hole
shadow, deflection angles, and quasinormal modes (QNMs). We find that these
properties diminish as the dimensionality ($n$) of the black hole increases.
Analysis of the s... | [
{
"created": "Wed, 12 Jun 2024 10:57:18 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jun 2024 12:01:13 GMT",
"version": "v2"
}
] | 2024-06-24 | [
[
"Lobos",
"Nikko John Leo S.",
""
],
[
"Ncube",
"Anele M.",
""
],
[
"Pantig",
"Reggie C.",
""
],
[
"Cornell",
"Alan S.",
""
]
] | We investigate the impact of higher dimensions on the properties of Schwarzschild-Tangherlini black holes, focusing on the photonsphere, black hole shadow, deflection angles, and quasinormal modes (QNMs). We find that these properties diminish as the dimensionality ($n$) of the black hole increases. Analysis of the sha... |
0809.0273 | Piotr Jaranowski | P.Astone, M.Bassan, P.Bonifazi, K.M.Borkowski, R.J.Budzy\'nski,
A.Chincarini, E.Coccia, S.D'Antonio, M.Di Paolo Emilio, V.Fafone, S.Frasca,
S.Foffa, G.Giordano, P.Jaranowski, W.Kondracki, A.Kr\'olak, M.Maggiore,
A.Marini, Y.Minenkov, I.Modena, G.Modestino, A.Moleti, G.V.Pallottino,
C.Palomba, R.Parodi, M.Pietka... | All-sky search of NAUTILUS data | LaTeX, 12 pages | Class.Quant.Grav.25:184012,2008 | 10.1088/0264-9381/25/18/184012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A search for periodic gravitational-wave signals from isolated neutron stars
in the NAUTILUS detector data is presented. We have analyzed half a year of
data over the frequency band $<922.2; 923.2>$ Hz, the spindown range
$<-1.463\times10^{-8}; 0>$ Hz/s and over the entire sky. We have divided the
data into 2 day str... | [
{
"created": "Mon, 1 Sep 2008 15:45:11 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Astone",
"P.",
""
],
[
"Bassan",
"M.",
""
],
[
"Bonifazi",
"P.",
""
],
[
"Borkowski",
"K. M.",
""
],
[
"Budzyński",
"R. J.",
""
],
[
"Chincarini",
"A.",
""
],
[
"Coccia",
"E.",
""
],
[
"D'Antonio",... | A search for periodic gravitational-wave signals from isolated neutron stars in the NAUTILUS detector data is presented. We have analyzed half a year of data over the frequency band $<922.2; 923.2>$ Hz, the spindown range $<-1.463\times10^{-8}; 0>$ Hz/s and over the entire sky. We have divided the data into 2 day stret... |
2312.03860 | Charlie Hoy | Josu C. Aurrekoetxea, Charlie Hoy and Mark Hannam | Revisiting the cosmic string origin of GW190521 | 6 pages, 3 figures. Matches version published in PRL | null | null | LIGO-P2300425 | gr-qc astro-ph.CO astro-ph.HE hep-ph | http://creativecommons.org/licenses/by/4.0/ | For the first time we analyse gravitational-wave strain data using waveforms
constructed from strong gravity simulations of cosmic string loops collapsing
to Schwarzschild black holes; a previously unconsidered source. Since the
expected signal is dominated by a black-hole ringdown, it can mimic the
observed gravitat... | [
{
"created": "Wed, 6 Dec 2023 19:15:56 GMT",
"version": "v1"
},
{
"created": "Fri, 10 May 2024 12:05:35 GMT",
"version": "v2"
}
] | 2024-05-13 | [
[
"Aurrekoetxea",
"Josu C.",
""
],
[
"Hoy",
"Charlie",
""
],
[
"Hannam",
"Mark",
""
]
] | For the first time we analyse gravitational-wave strain data using waveforms constructed from strong gravity simulations of cosmic string loops collapsing to Schwarzschild black holes; a previously unconsidered source. Since the expected signal is dominated by a black-hole ringdown, it can mimic the observed gravitatio... |
gr-qc/0112040 | Alan D. Rendall | Alan D. Rendall | Cosmological models and centre manifold theory | 17 pages | Gen.Rel.Grav. 34 (2002) 1277-1294 | 10.1023/A:1019734703162 | AEI-2001-144 | gr-qc | null | Centre manifold theory is applied to some dynamical systems arising from
spatially homogeneous cosmological models. Detailed information is obtained
concerning the late-time behaviour of solutions of the Einstein equations of
Bianchi type III with collisionless matter. In addition some statements in the
literature on... | [
{
"created": "Mon, 17 Dec 2001 14:03:17 GMT",
"version": "v1"
}
] | 2021-10-20 | [
[
"Rendall",
"Alan D.",
""
]
] | Centre manifold theory is applied to some dynamical systems arising from spatially homogeneous cosmological models. Detailed information is obtained concerning the late-time behaviour of solutions of the Einstein equations of Bianchi type III with collisionless matter. In addition some statements in the literature on s... |
gr-qc/0609073 | Celine Cattoen | Celine Cattoen (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Generalized Puisieux series expansion for cosmological milestones | 3 pages, using World Scientific templates, conference proceedings for
MG11 Berlin, July 2006, to be published by World Scientific | null | null | null | gr-qc | null | We use generalized Puisieux series expansions to determine the behaviour of
the scale factor in the vicinity of typical cosmological milestones occurring
in a FRW universe. We describe some of the consequences of this generalized
Puisieux series expansion on other physical observables.
| [
{
"created": "Wed, 20 Sep 2006 00:20:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cattoen",
"Celine",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | We use generalized Puisieux series expansions to determine the behaviour of the scale factor in the vicinity of typical cosmological milestones occurring in a FRW universe. We describe some of the consequences of this generalized Puisieux series expansion on other physical observables. |
gr-qc/0507139 | Guillermo A. Mena Marugan | Jeronimo Cortez and Guillermo A. Mena Marugan | Feasibility of a Unitary Quantum Dynamics in the Gowdy $T^3$
Cosmological Model | 12 pages, version accepted for publication in Physical Review D | Phys.Rev. D72 (2005) 064020 | 10.1103/PhysRevD.72.064020 | null | gr-qc | null | It has been pointed out that it is impossible to obtain a unitary
implementation of the dynamics for the polarized Gowdy $T^{3}$ cosmologies in
an otherwise satisfactory, nonperturbative canonical quantization proposed for
these spacetimes. By introducing suitable techniques to deal with
deparametrized models in cosm... | [
{
"created": "Fri, 29 Jul 2005 16:14:06 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Sep 2005 12:45:27 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Cortez",
"Jeronimo",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
]
] | It has been pointed out that it is impossible to obtain a unitary implementation of the dynamics for the polarized Gowdy $T^{3}$ cosmologies in an otherwise satisfactory, nonperturbative canonical quantization proposed for these spacetimes. By introducing suitable techniques to deal with deparametrized models in cosmol... |
0908.3680 | Matthew DePies | Matthew R Depies | Gravitational Waves and Light Cosmic Strings | 129 pages, 18 figures, PhD dissertation | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave signatures from cosmic strings are analyzed numerically.
Cosmic string networks form during phase transistions in the early universe and
these networks of long cosmic strings break into loops that radiate energy in
the form of gravitational waves until they decay. The gravitational waves come
in th... | [
{
"created": "Tue, 25 Aug 2009 20:11:35 GMT",
"version": "v1"
}
] | 2009-09-30 | [
[
"Depies",
"Matthew R",
""
]
] | Gravitational wave signatures from cosmic strings are analyzed numerically. Cosmic string networks form during phase transistions in the early universe and these networks of long cosmic strings break into loops that radiate energy in the form of gravitational waves until they decay. The gravitational waves come in the ... |
1006.0388 | Hanno Sahlmann | Hanno Sahlmann | On loop quantum gravity kinematics with non-degenerate spatial
background | 13 pages, 2 figures. v2: Some clarifications added, typos removed.
Virtually identical with published version | Class. Quant Grav.27:225007, 2010 | 10.1088/0264-9381/27/22/225007 | KA-TP-14-2010 | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a remarkable paper, T. Koslowski introduced kinematical representations
for loop quantum gravity in which there is a non-degenerate spatial background
metric present. He also considered their properties, and showed that Gauss and
diffeomorphism constraints can be implemented. With the present article, we
streamlin... | [
{
"created": "Wed, 2 Jun 2010 14:20:25 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Oct 2010 03:59:52 GMT",
"version": "v2"
}
] | 2010-10-27 | [
[
"Sahlmann",
"Hanno",
""
]
] | In a remarkable paper, T. Koslowski introduced kinematical representations for loop quantum gravity in which there is a non-degenerate spatial background metric present. He also considered their properties, and showed that Gauss and diffeomorphism constraints can be implemented. With the present article, we streamline ... |
1211.5180 | Jian-Yang Zhu | Xiao Liu, Fei Huang and Jian-Yang Zhu | Path Integral of Bianchi I models in Loop Quantum Cosmology | 11 pages,revised version, accepted for publication in Class. Quantum
Grav | Class. Quantum Grav. 30 (2013) 065010 | 10.1088/0264-9381/30/6/065010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A path integral formulation of the Bianchi I models containing a massless
scalar field in loop quantum cosmology is constructed. Following the strategy
used in the homogenous and isotropic case, the calculation is extended to the
simplest non-isotropic models according to the $\bar{\mu}$ and
$\bar{\mu}^{\prime}$ sche... | [
{
"created": "Thu, 22 Nov 2012 01:21:24 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Feb 2013 12:42:00 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Liu",
"Xiao",
""
],
[
"Huang",
"Fei",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | A path integral formulation of the Bianchi I models containing a massless scalar field in loop quantum cosmology is constructed. Following the strategy used in the homogenous and isotropic case, the calculation is extended to the simplest non-isotropic models according to the $\bar{\mu}$ and $\bar{\mu}^{\prime}$ scheme... |
0803.1481 | Adellane Sousa | A. A. Sousa, R. B. Pereira and A. C. Silva | Energy and Angular Momentum Densities in a Godel-Type Universe in the
Teleparallel Geometry | 20 pages, no figures. Revised in view of Referee's comments. Version
to appear in the Gravitation and Cosmology | Grav.Cosmol.16:25-33,2010 | 10.1134/S0202289310010044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main scope of this research consists in evaluating the energy-momentum
(gravitational field plus matter) and gravitational angular momentum densities
in the universe with global rotation, considering the Godel-Obukhov metric. For
this, we use the Hamiltonian formalism of the Teleparallel Equivalent of
General Rel... | [
{
"created": "Mon, 10 Mar 2008 19:49:49 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Mar 2008 20:06:31 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Dec 2009 14:56:14 GMT",
"version": "v3"
}
] | 2010-03-19 | [
[
"Sousa",
"A. A.",
""
],
[
"Pereira",
"R. B.",
""
],
[
"Silva",
"A. C.",
""
]
] | The main scope of this research consists in evaluating the energy-momentum (gravitational field plus matter) and gravitational angular momentum densities in the universe with global rotation, considering the Godel-Obukhov metric. For this, we use the Hamiltonian formalism of the Teleparallel Equivalent of General Relat... |
2203.08460 | Mehdi Shokri | Jafar Sadeghi, Saeed Noori Gashti and Mehdi Shokri | Anisotropic constant-roll inflationary scenario with complex
quintessence field and swampland conjectures | 18 pages, 2 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/publicdomain/zero/1.0/ | In this paper, with the presence of swampland conjecture, we use the complex
form of a scalar field and investigate the anisotropic constant-roll of an
inflationary scenario. Recently, the complex quintessence field has been used
to describe the accelerating expansion of the universe which has had
interesting results... | [
{
"created": "Wed, 16 Mar 2022 08:37:31 GMT",
"version": "v1"
}
] | 2022-03-17 | [
[
"Sadeghi",
"Jafar",
""
],
[
"Gashti",
"Saeed Noori",
""
],
[
"Shokri",
"Mehdi",
""
]
] | In this paper, with the presence of swampland conjecture, we use the complex form of a scalar field and investigate the anisotropic constant-roll of an inflationary scenario. Recently, the complex quintessence field has been used to describe the accelerating expansion of the universe which has had interesting results c... |
2206.15187 | Lijing Shao | Lijing Shao | Radio Pulsars as a Laboratory for Strong-field Gravity Tests | 16 pages, 4 figures; Invited contribution to the forthcoming book
"Modified and Quantum Gravity - From theory to experimental searches on all
scales", Springer Nature, (Eds) Claus L\"ammerzahl and Christian Pfeifer | Lecture Notes in Physics 1017 (2023) 385 | 10.1007/978-3-031-31520-6_12 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | General relativity offers a classical description to gravitation and
spacetime, and is a cornerstone for modern physics. It has passed a number of
empirical tests with flying colours, mostly in the weak-gravity regimes, but
nowadays also in the strong-gravity regimes. Radio pulsars provide one of the
earliest extraso... | [
{
"created": "Thu, 30 Jun 2022 10:54:43 GMT",
"version": "v1"
}
] | 2023-10-06 | [
[
"Shao",
"Lijing",
""
]
] | General relativity offers a classical description to gravitation and spacetime, and is a cornerstone for modern physics. It has passed a number of empirical tests with flying colours, mostly in the weak-gravity regimes, but nowadays also in the strong-gravity regimes. Radio pulsars provide one of the earliest extrasola... |
2010.11452 | Paulo Jos\'e Ferreira Porf\'irio da Silva | C. Furtado, J. R. Nascimento, A. Yu. Petrov, P. J. Porf\'irio and A.
R. Soares | Strong gravitational lensing in a spacetime with topological charge
within the Eddington-inspired Born-Infeld gravity | 20 pages, 5 figures | Phys. Rev. D 103, 044047 (2021) | 10.1103/PhysRevD.103.044047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we calculate the angular deflection of light in the strong field
limit in two spacetimes which were previously studied within the
Eddington-inspired Born-Infeld gravity (EiBI), namely, a black hole and a
wormhole, both with topological charge. We show that the presence of the
parameters characterizing Ei... | [
{
"created": "Thu, 22 Oct 2020 05:26:23 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Oct 2020 06:57:41 GMT",
"version": "v2"
}
] | 2021-02-26 | [
[
"Furtado",
"C.",
""
],
[
"Nascimento",
"J. R.",
""
],
[
"Petrov",
"A. Yu.",
""
],
[
"Porfírio",
"P. J.",
""
],
[
"Soares",
"A. R.",
""
]
] | In this work we calculate the angular deflection of light in the strong field limit in two spacetimes which were previously studied within the Eddington-inspired Born-Infeld gravity (EiBI), namely, a black hole and a wormhole, both with topological charge. We show that the presence of the parameters characterizing EiBI... |
1202.1271 | Ivano Dami\~ao Soares | R. F. Aranha, I. Dami\~ao Soares and E. V. Tonini | Gravitational Wave Recoil and Kick Processes in the Merger of Two
Colliding Black Holes: The Non Head-on Case | 11 pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine numerically the process of gravitational wave recoil in the merger
of two black holes in non head-on collision, in the realm of Robinson-Trautman
spacetimes. Characteristic initial data for the system are constructed, and the
evolution covers the post-merger phase up to the final configuration of the
remna... | [
{
"created": "Mon, 6 Feb 2012 20:49:57 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Feb 2012 21:03:31 GMT",
"version": "v2"
}
] | 2012-02-16 | [
[
"Aranha",
"R. F.",
""
],
[
"Soares",
"I. Damião",
""
],
[
"Tonini",
"E. V.",
""
]
] | We examine numerically the process of gravitational wave recoil in the merger of two black holes in non head-on collision, in the realm of Robinson-Trautman spacetimes. Characteristic initial data for the system are constructed, and the evolution covers the post-merger phase up to the final configuration of the remnant... |
1808.06630 | Savitri V. Iyer | S. V. Iyer | Frame-dragging induced asymmetry in the bending of light near a Kerr
black hole | 6 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The deflection of light's trajectory has been studied in many different
spacetime geometries in weak and strong gravity, including the special cases of
spherically symmetric static and spinning black holes. It is also well known
that the rotation of massive objects results in the dragging of inertial frames
in the sp... | [
{
"created": "Mon, 20 Aug 2018 18:06:13 GMT",
"version": "v1"
}
] | 2018-08-22 | [
[
"Iyer",
"S. V.",
""
]
] | The deflection of light's trajectory has been studied in many different spacetime geometries in weak and strong gravity, including the special cases of spherically symmetric static and spinning black holes. It is also well known that the rotation of massive objects results in the dragging of inertial frames in the spac... |
gr-qc/0105057 | Anatoli Vankov | Anatoli Vankov (Physics Department, Eastern Illinois University, USA) | Proposal of Experimental Test of General Relativity Theory | 28 pages | null | null | null | gr-qc | null | On the basis of the relativistic mass-energy concept we found that a proper
mass of a test particle in a gravitational field depends on a potential energy,
hence, a freely falling particle has a varying proper mass. Consequently, a
multitude of freely falling reference frames cannot be regarded as a multitude
of equi... | [
{
"created": "Thu, 17 May 2001 13:48:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Vankov",
"Anatoli",
"",
"Physics Department, Eastern Illinois University, USA"
]
] | On the basis of the relativistic mass-energy concept we found that a proper mass of a test particle in a gravitational field depends on a potential energy, hence, a freely falling particle has a varying proper mass. Consequently, a multitude of freely falling reference frames cannot be regarded as a multitude of equiva... |
gr-qc/9403008 | Luis J. Garay | Luis J. Garay | Quantum gravity and minimum length | 23 pages, RevTeX, few minor changes, published version | Int.J.Mod.Phys. A10 (1995) 145-166 | 10.1142/S0217751X95000085 | Imperial/TP/93-94/20 | gr-qc hep-th | null | The existence of a fundamental scale, a lower bound to any output of a
position measurement, seems to be a model-independent feature of quantum
gravity. In fact, different approaches to this theory lead to this result. The
key ingredients for the appearance of this minimum length are quantum
mechanics, special relati... | [
{
"created": "Wed, 2 Mar 1994 15:50:51 GMT",
"version": "v1"
},
{
"created": "Tue, 9 May 1995 09:39:08 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Garay",
"Luis J.",
""
]
] | The existence of a fundamental scale, a lower bound to any output of a position measurement, seems to be a model-independent feature of quantum gravity. In fact, different approaches to this theory lead to this result. The key ingredients for the appearance of this minimum length are quantum mechanics, special relativi... |
2112.13349 | Neven Bili\'c | Neven Bilic | Analog Schwarzschild-like geometry in fluids with external pressure | 20 pages, comments added, a few issues clarified, conclusions
expanded, typos corrected, results unchanged, to appear in Phys. Rev. D | null | 10.1103/PhysRevD.105.064052 | RBI-ThPhys-2022-3 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study acoustic geometry in fluids with external pressure. In particular,
we examine the conditions under which the acoustic metric mimics a
Schwarzschild-like metric. We demonstrate that it is possible to mimic a
Schwarzschild-like geometry in a consistent way only in the framework of
relativistic acoustic geometr... | [
{
"created": "Sun, 26 Dec 2021 10:35:51 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Mar 2022 10:19:19 GMT",
"version": "v2"
}
] | 2022-04-06 | [
[
"Bilic",
"Neven",
""
]
] | We study acoustic geometry in fluids with external pressure. In particular, we examine the conditions under which the acoustic metric mimics a Schwarzschild-like metric. We demonstrate that it is possible to mimic a Schwarzschild-like geometry in a consistent way only in the framework of relativistic acoustic geometry. |
gr-qc/9311007 | null | S.Carlip and J.E.Nelson | Equivalent Quantisations of (2+1)-Dimensional Gravity | 7 pages, Plain Tex, DFTT 67/93, UCD-93-33 | Phys.Lett.B324:299-302,1994 | 10.1016/0370-2693(94)90197-X | null | gr-qc hep-th | null | For spacetimes with the topology $\IR\!\times\!T^2$, the action of
(2+1)-dimensional gravity with negative cosmological constant $\La$ is written
uniquely in terms of the time-independent traces of holonomies around two
intersecting noncontractible paths on $T^2$. The holonomy parameters are
related to the moduli on ... | [
{
"created": "Fri, 5 Nov 1993 08:39:42 GMT",
"version": "v1"
}
] | 2010-04-28 | [
[
"Carlip",
"S.",
""
],
[
"Nelson",
"J. E.",
""
]
] | For spacetimes with the topology $\IR\!\times\!T^2$, the action of (2+1)-dimensional gravity with negative cosmological constant $\La$ is written uniquely in terms of the time-independent traces of holonomies around two intersecting noncontractible paths on $T^2$. The holonomy parameters are related to the moduli on sl... |
gr-qc/0401021 | Dr Mayeul Arminjon | Mayeul Arminjon | Ether theory of gravitation: why and how? | Standard LaTeX, 60 pages. Invited contribution to the book ``Ether,
Spacetime and Cosmology" (M. C. Duffy, ed.), to appear at Hadronic Press. v2:
minor improvements, new refs., post-scriptum summarizing later work | Ether, space-time and cosmology, Vol. 1: Modern ether concepts,
relativity and geometry (M. C. Duffy and J. Levy, Eds.), PD Publications,
Liverpool, UK (2008), pp. 139-201. ISBN: 1 873 694 10 5 | null | null | gr-qc | null | Gravitation might make a preferred frame appear, and with it a clear
space/time separation--the latter being, a priori, needed by quantum mechanics
(QM) in curved space-time. Several models of gravitation with an ether are
discussed: they assume metrical effects in an heterogeneous ether and/or a
Lorentz-symmetry bre... | [
{
"created": "Wed, 7 Jan 2004 13:20:27 GMT",
"version": "v1"
},
{
"created": "Thu, 31 May 2007 15:10:07 GMT",
"version": "v2"
}
] | 2008-04-07 | [
[
"Arminjon",
"Mayeul",
""
]
] | Gravitation might make a preferred frame appear, and with it a clear space/time separation--the latter being, a priori, needed by quantum mechanics (QM) in curved space-time. Several models of gravitation with an ether are discussed: they assume metrical effects in an heterogeneous ether and/or a Lorentz-symmetry break... |
gr-qc/0401083 | Francisco Lobo | Francisco S.N. Lobo | Thin shells around traversable wormholes | 17 pages, 13 figures, Revtex4. Talk delivered at the APCTP Winter
School and Workshop: Quantum Gravity, Black Holes and Wormholes, POSTECH,
Pohang School of Environmental Engineering, South Korea, 11-14 Dec. 2003 | null | null | null | gr-qc | null | Applying the Darmois-Israel thin shell formalism, we construct static and
dynamic thin shells around traversable wormholes. Firstly, by applying the
cut-and-paste technique we apply a linearized stability analysis to thin-shell
wormholes in the presence of a generic cosmological constant. We find that for
large posit... | [
{
"created": "Sun, 18 Jan 2004 19:23:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lobo",
"Francisco S. N.",
""
]
] | Applying the Darmois-Israel thin shell formalism, we construct static and dynamic thin shells around traversable wormholes. Firstly, by applying the cut-and-paste technique we apply a linearized stability analysis to thin-shell wormholes in the presence of a generic cosmological constant. We find that for large positiv... |
2305.15326 | Jos\'e Jaime Terente D\'iaz | Jos\'e Jaime Terente D\'iaz and Mindaugas Kar\v{c}iauskas | Comoving curvature perturbation in Jordan and Einstein frames | 23 pages | Phys. Rev. D 108, 083535 (2023) | 10.1103/PhysRevD.108.083535 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of $F(\phi)R$ models of gravity, the conformal invariance of
the curvature perturbation on uniform-field slices has been already
demonstrated in several publications. In this work we study the curvature
perturbation $\mathcal{R}$ defined on hypersurfaces that comove with the
effective fluid whose energ... | [
{
"created": "Wed, 24 May 2023 16:42:01 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Aug 2023 12:34:55 GMT",
"version": "v2"
}
] | 2023-11-01 | [
[
"Díaz",
"José Jaime Terente",
""
],
[
"Karčiauskas",
"Mindaugas",
""
]
] | In the context of $F(\phi)R$ models of gravity, the conformal invariance of the curvature perturbation on uniform-field slices has been already demonstrated in several publications. In this work we study the curvature perturbation $\mathcal{R}$ defined on hypersurfaces that comove with the effective fluid whose energy-... |
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