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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2407.20946 | Anna Neuweiler | Anna Neuweiler, Tim Dietrich, Bernd Br\"ugmann, Edoardo Giangrandi,
Kenta Kiuchi, Federico Schianchi, Philipp M\"osta, Swapnil Shankar, Bruno
Giacomazzo, and Masaru Shibata | General Relativistic Magneto-Hydrodynamic Simulations with BAM:
Implementation and Code Comparison | 21 pages, 21 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary neutron star mergers are among the most energetic events in our
Universe, with magnetic fields significantly impacting their dynamics,
particularly after the merger. While numerical-relativity simulations that
correctly describe the physics are essential to model their rich phenomenology,
the inclusion of magn... | [
{
"created": "Tue, 30 Jul 2024 16:25:33 GMT",
"version": "v1"
}
] | 2024-07-31 | [
[
"Neuweiler",
"Anna",
""
],
[
"Dietrich",
"Tim",
""
],
[
"Brügmann",
"Bernd",
""
],
[
"Giangrandi",
"Edoardo",
""
],
[
"Kiuchi",
"Kenta",
""
],
[
"Schianchi",
"Federico",
""
],
[
"Mösta",
"Philipp",
""
],
... | Binary neutron star mergers are among the most energetic events in our Universe, with magnetic fields significantly impacting their dynamics, particularly after the merger. While numerical-relativity simulations that correctly describe the physics are essential to model their rich phenomenology, the inclusion of magnet... |
0902.0129 | Hao Wei | Hao Wei | Entropy-Corrected Holographic Dark Energy | 11 pages, 2 tables, revtex4; v2: references added | Commun.Theor.Phys.52:743-749,2009 | 10.1088/0253-6102/52/4/35 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The holographic dark energy (HDE) is now an interesting candidate of dark
energy, which has been studied extensively in the literature. In the derivation
of HDE, the black hole entropy plays an important role. In fact, the
entropy-area relation can be modified due to loop quantum gravity or other
reasons. With the mo... | [
{
"created": "Sun, 1 Feb 2009 21:41:00 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Sep 2009 03:23:15 GMT",
"version": "v2"
}
] | 2009-10-12 | [
[
"Wei",
"Hao",
""
]
] | The holographic dark energy (HDE) is now an interesting candidate of dark energy, which has been studied extensively in the literature. In the derivation of HDE, the black hole entropy plays an important role. In fact, the entropy-area relation can be modified due to loop quantum gravity or other reasons. With the modi... |
1906.00404 | Ion I. Cotaescu | Ion I. Cotaescu | Rest frame vacuum of the Dirac field on spatially flat FLRW spacetimes | 5 pages, no figures | null | 10.1140/epjc/s10052-019-7200-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In quantum theory of the free Dirac field on spatially flat FLRW spacetimes
we introduce a new type of vacuum able to separate the positive and negative
frequencies in the rest frames. This is refereed as the rest frame vacuum
shoving that this differs from the adiabatic vacuum apart from the Minkowski
spacetime wher... | [
{
"created": "Sun, 2 Jun 2019 13:51:06 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jun 2019 13:12:56 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Cotaescu",
"Ion I.",
""
]
] | In quantum theory of the free Dirac field on spatially flat FLRW spacetimes we introduce a new type of vacuum able to separate the positive and negative frequencies in the rest frames. This is refereed as the rest frame vacuum shoving that this differs from the adiabatic vacuum apart from the Minkowski spacetime where ... |
2305.05042 | Ramon Herrera | Ramon Herrera, Michel Housset, Constanza Osses and Nelson Videla | Reconstructing k-inflation from $n_s(N)$ and reheating constraints | 40 pages and 6 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Inspired by the reconstruction scheme of the inflaton field potential
$V(\phi)$ from the attractors$n_s(N)$, we investigate the viability of
reconstruct the inflationary potential within the framework of k-inflation for
a non-linear kinetic term $K(X)=k_{n+1}X^n$ through three expressions for the
scalar spectral inde... | [
{
"created": "Mon, 8 May 2023 20:56:34 GMT",
"version": "v1"
}
] | 2023-05-10 | [
[
"Herrera",
"Ramon",
""
],
[
"Housset",
"Michel",
""
],
[
"Osses",
"Constanza",
""
],
[
"Videla",
"Nelson",
""
]
] | Inspired by the reconstruction scheme of the inflaton field potential $V(\phi)$ from the attractors$n_s(N)$, we investigate the viability of reconstruct the inflationary potential within the framework of k-inflation for a non-linear kinetic term $K(X)=k_{n+1}X^n$ through three expressions for the scalar spectral index ... |
1807.09056 | Antoine Folacci | Antoine Folacci and Mohamed Ould El Hadj | An alternative description of gravitational radiation from black holes
based on the Regge poles of the ${\cal S}$-matrix and the associated residues | v2 : minor changes and a few typos corrected. v3: One typo corrected
and minor changes in the text to match the published version. v4: The sense
of the contour in Eqs. (50) and (51) as well as a global sign in Eq. (53)
have been corrected. (Results unchanged because calculations have been
performed with the rig... | Phys. Rev. D 98, 064052 (2018) | 10.1103/PhysRevD.98.064052 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We advocate for an alternative description of gravitational radiation from
black holes based on complex angular momentum techniques (analytic continuation
of partial wave expansions, duality of the ${\cal S}$-matrix and effective
resummations involving its Regge poles and the associated residues, Regge
trajectories, ... | [
{
"created": "Tue, 24 Jul 2018 12:02:44 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Sep 2018 14:10:57 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Sep 2018 11:50:35 GMT",
"version": "v3"
},
{
"created": "Wed, 15 Apr 2020 18:13:36 GMT",
"version": "v4"
}
] | 2020-04-17 | [
[
"Folacci",
"Antoine",
""
],
[
"Hadj",
"Mohamed Ould El",
""
]
] | We advocate for an alternative description of gravitational radiation from black holes based on complex angular momentum techniques (analytic continuation of partial wave expansions, duality of the ${\cal S}$-matrix and effective resummations involving its Regge poles and the associated residues, Regge trajectories, se... |
1711.09027 | Jerzy Kr\'ol | Michael Heller and Jerzy Kr\'ol | Beyond the Space-Time Boundary | 10 pages | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In General Relativity a space-time $M$ is regarded singular if there is an
obstacle that prevents an incomplete curve in $M$ to be continued. Usually,
such a space-time is completed to form $\bar{M} = M \cup \partial M$ where
$\partial M$ is a singular boundary of $M$. The standard geometric tools on $M$
do not allow... | [
{
"created": "Fri, 24 Nov 2017 15:55:48 GMT",
"version": "v1"
}
] | 2017-11-27 | [
[
"Heller",
"Michael",
""
],
[
"Król",
"Jerzy",
""
]
] | In General Relativity a space-time $M$ is regarded singular if there is an obstacle that prevents an incomplete curve in $M$ to be continued. Usually, such a space-time is completed to form $\bar{M} = M \cup \partial M$ where $\partial M$ is a singular boundary of $M$. The standard geometric tools on $M$ do not allow "... |
1608.06089 | Kalin Marinov Mr. | Plamen Fiziev, Kalin Marinov | Modeling of non-rotating neutron stars in minimal dilatonic gravity | 12 pages, 17 figures, LaTeX file, new section added, 2 new figures
added, final published version | Astrophys Space Sci (2017) 362: 8 | 10.1007/s10509-016-2991-x | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The model of minimal dilatonic gravity (MDG), called also the massive
Branse-Dicke model with $\omega =0$, is an alternative model of gravitation,
which uses one Branse-Dicke gravitation-dilaton field $\Phi$ and offers a
simultaneous explanation of the effects of dark energy (DE) and dark matter
(DM). Here we present... | [
{
"created": "Mon, 22 Aug 2016 08:56:38 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Dec 2016 12:49:49 GMT",
"version": "v2"
}
] | 2016-12-14 | [
[
"Fiziev",
"Plamen",
""
],
[
"Marinov",
"Kalin",
""
]
] | The model of minimal dilatonic gravity (MDG), called also the massive Branse-Dicke model with $\omega =0$, is an alternative model of gravitation, which uses one Branse-Dicke gravitation-dilaton field $\Phi$ and offers a simultaneous explanation of the effects of dark energy (DE) and dark matter (DM). Here we present a... |
1812.05468 | Maciej Dunajski | Maciej Dunajski, Paul Tod | Conformally isometric embeddings and Hawking temperature | Final version, to appear in Classical and Quantum Gravity | null | 10.1088/1361-6382/ab2068 | DAMTP-2018-42 | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find necessary and sufficient conditions for existence of a locally
isometric embedding of a vacuum space-time into a conformally-flat 5-space. We
explicitly construct such embeddings for any spherically symmetric Lorentzian
metric in $3+1$ dimensions as a hypersurface in $R^{4, 1}$. For the
Schwarzschild metric t... | [
{
"created": "Thu, 13 Dec 2018 14:57:57 GMT",
"version": "v1"
},
{
"created": "Tue, 21 May 2019 13:46:45 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Dunajski",
"Maciej",
""
],
[
"Tod",
"Paul",
""
]
] | We find necessary and sufficient conditions for existence of a locally isometric embedding of a vacuum space-time into a conformally-flat 5-space. We explicitly construct such embeddings for any spherically symmetric Lorentzian metric in $3+1$ dimensions as a hypersurface in $R^{4, 1}$. For the Schwarzschild metric the... |
gr-qc/9608050 | Bernd Bruegmann | Bernd Bruegmann | Adaptive mesh and geodesically sliced Schwarzschild spacetime in 3+1
dimensions | 21 pages, LaTeX, 7 figures included with epsf | Phys.Rev.D54:7361-7372,1996 | 10.1103/PhysRevD.54.7361 | null | gr-qc | null | We present first results obtained with a 3+1 dimensional adaptive mesh code
in numerical general relativity. The adaptive mesh is used in conjunction with
a standard ADM code for the evolution of a dynamically sliced Schwarzschild
spacetime (geodesic slicing). We argue that adaptive mesh is particularly
natural in th... | [
{
"created": "Wed, 21 Aug 1996 14:37:28 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bruegmann",
"Bernd",
""
]
] | We present first results obtained with a 3+1 dimensional adaptive mesh code in numerical general relativity. The adaptive mesh is used in conjunction with a standard ADM code for the evolution of a dynamically sliced Schwarzschild spacetime (geodesic slicing). We argue that adaptive mesh is particularly natural in the ... |
1005.2360 | Clovis Jacinto de Matos | Clovis Jacinto de Matos | Are Superfluid Vortices in Pulsars Violating the Weak Equivalence
Principle? | 15 pages | null | null | null | gr-qc astro-ph.SR cond-mat.other | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we argue that timing irregularities in pulsars, like
glitches and timing noise, could be associated with the violation of the weak
equivalence principle for vortices in the superfluid core of rotating neutron
stars.
| [
{
"created": "Tue, 11 May 2010 10:14:51 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Nov 2010 10:11:39 GMT",
"version": "v2"
}
] | 2010-11-04 | [
[
"de Matos",
"Clovis Jacinto",
""
]
] | In the present paper we argue that timing irregularities in pulsars, like glitches and timing noise, could be associated with the violation of the weak equivalence principle for vortices in the superfluid core of rotating neutron stars. |
gr-qc/9911027 | Gabriela Gonzalez | Mark A. Beilby, Gabriela Gonzalez, Michelle Duffy, Amber Stuver,
Jennifer Poker | Development of a Double Pendulum for Gravitational Wave Detectors | one page, one figure, RevTeX, to appear in the proceedings of the
Third Amaldi conference | null | 10.1063/1.1291907 | CGPG-99/11-5 | gr-qc | null | Seismic noise will be the dominant source of noise at low frequencies for
ground based gravitational wave detectors, such as LIGO now under construction.
Future interferometers installed at LIGO plan to use at least a double pendulum
suspension for the test masses to help filter the seismic noise. We are
constructing... | [
{
"created": "Mon, 8 Nov 1999 18:41:36 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Beilby",
"Mark A.",
""
],
[
"Gonzalez",
"Gabriela",
""
],
[
"Duffy",
"Michelle",
""
],
[
"Stuver",
"Amber",
""
],
[
"Poker",
"Jennifer",
""
]
] | Seismic noise will be the dominant source of noise at low frequencies for ground based gravitational wave detectors, such as LIGO now under construction. Future interferometers installed at LIGO plan to use at least a double pendulum suspension for the test masses to help filter the seismic noise. We are constructing a... |
1401.7251 | Yaron Hadad | Yaron Hadad and Vladimir Zakharov | Transparency of Strong Gravitational Waves | null | null | 10.1016/j.geomphys.2014.02.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper studies diagonal spacetime metrics. It is shown that the
overdetermined Einstein vacuum equations are compatible if one Killing vector
exists. The stability of plane gravitational waves of the Robinson type is
studied. This stability problem bares a fantastic mathematical resemblance to
the stability of th... | [
{
"created": "Tue, 28 Jan 2014 16:39:46 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Feb 2014 15:12:30 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Hadad",
"Yaron",
""
],
[
"Zakharov",
"Vladimir",
""
]
] | This paper studies diagonal spacetime metrics. It is shown that the overdetermined Einstein vacuum equations are compatible if one Killing vector exists. The stability of plane gravitational waves of the Robinson type is studied. This stability problem bares a fantastic mathematical resemblance to the stability of the ... |
0911.0769 | Sergey Cherkas L | S. V. Anischenko, S. L. Cherkas, V. L. Kalashnikov | Cosmological production of fermions in a flat Friedman universe with
linearly growing scale factor: exactly solvable model | Mathematica notebook with details of calculations is available under
request | Nonlin.Phenom.Complex Syst.13:315-319,2010 | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an exactly solvable model for production of fermions in the
Friedman flat universe with a scale factor linearly growing with time. Exact
solution expressed through the special functions admit an analytical
calculation of the number density of created particles. We also discuss in
general the role of the p... | [
{
"created": "Wed, 4 Nov 2009 10:23:16 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Feb 2010 13:25:24 GMT",
"version": "v2"
},
{
"created": "Sat, 20 Mar 2010 07:54:08 GMT",
"version": "v3"
}
] | 2011-01-04 | [
[
"Anischenko",
"S. V.",
""
],
[
"Cherkas",
"S. L.",
""
],
[
"Kalashnikov",
"V. L.",
""
]
] | We consider an exactly solvable model for production of fermions in the Friedman flat universe with a scale factor linearly growing with time. Exact solution expressed through the special functions admit an analytical calculation of the number density of created particles. We also discuss in general the role of the phe... |
gr-qc/0507074 | Ewa Czuchry | Jerzy Kijowski and Ewa Czuchry | Dynamics of a self-gravitating shell of matter | published | Phys. Rev. D 72, 084015 (2005) | 10.1103/PhysRevD.72.084015 | null | gr-qc | null | Dynamics of a self-gravitating shell of matter is derived from the Hilbert
variational principle and then described as an (infinite dimensional,
constrained) Hamiltonian system. A method used here enables us to define
singular Riemann tensor of a non-continuous connection {\em via} standard
formulae of differential g... | [
{
"created": "Mon, 18 Jul 2005 11:44:25 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Nov 2005 20:29:20 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Kijowski",
"Jerzy",
""
],
[
"Czuchry",
"Ewa",
""
]
] | Dynamics of a self-gravitating shell of matter is derived from the Hilbert variational principle and then described as an (infinite dimensional, constrained) Hamiltonian system. A method used here enables us to define singular Riemann tensor of a non-continuous connection {\em via} standard formulae of differential geo... |
1404.2284 | Hamsa Padmanabhan | T. Padmanabhan and Hamsa Padmanabhan | Cosmological Constant from the Emergent Gravity Perspective | Invited review to appear in Int. Jour. Mod. Phys. D; 48 pages; 5
figures | Int. Jour. Mod. Phys. D, Vol. 23, No. 6 (2014) 1430011 | 10.1142/S0218271814300110 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observations indicate that our universe is characterized by a late-time
accelerating phase, possibly driven by a cosmological constant $\Lambda$, with
the dimensionless parameter $\Lambda L_P^2 \simeq 10^{-122}$, where $L_P = (G
\hbar /c^3)^{1/2}$ is the Planck length. In this review, we describe how the
emergent gra... | [
{
"created": "Tue, 8 Apr 2014 20:00:22 GMT",
"version": "v1"
}
] | 2014-06-04 | [
[
"Padmanabhan",
"T.",
""
],
[
"Padmanabhan",
"Hamsa",
""
]
] | Observations indicate that our universe is characterized by a late-time accelerating phase, possibly driven by a cosmological constant $\Lambda$, with the dimensionless parameter $\Lambda L_P^2 \simeq 10^{-122}$, where $L_P = (G \hbar /c^3)^{1/2}$ is the Planck length. In this review, we describe how the emergent gravi... |
0807.3158 | Timothy Sumner | M.B. Gerrard and T.J. Sumner | Earth Flyby and Pioneer Anomalies | 17 pages, 4 figures. V2 Updated with clarified angle definitions and
formatting. V3 clearer diagrams, revised tables, addendum considering virtual
accelerations | null | null | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Applying Newtonian dynamics in five dimensions rather than four, to a
universe that is closed, isotropic and expanding,suggests that under certain
circumstances an additional and previously unidentified acceleration, a_A, can
arise affecting the four dimensional motion of spacecraft. The two cases of
this acceleratio... | [
{
"created": "Sun, 20 Jul 2008 14:19:58 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Oct 2008 12:56:50 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Apr 2010 14:21:59 GMT",
"version": "v3"
}
] | 2010-04-12 | [
[
"Gerrard",
"M. B.",
""
],
[
"Sumner",
"T. J.",
""
]
] | Applying Newtonian dynamics in five dimensions rather than four, to a universe that is closed, isotropic and expanding,suggests that under certain circumstances an additional and previously unidentified acceleration, a_A, can arise affecting the four dimensional motion of spacecraft. The two cases of this acceleration ... |
gr-qc/0512006 | Abhas Mitra | Abhas Mitra | Comments on "Derivation of the Raychaudhuri Equation" by Dadhich | 3 new references added, 2 of them are specific examples where
collapse generated radiation presuure prevents formation of Trapped Surfaces | null | null | null | gr-qc | null | In a recent preprint, gr-qc/0511123, Dadhich has given a brief yet beautiful
exposition on some of the research works by Prof. A.K. Raychaudhuri. Here
Dadhich highlights the fact that the apparently ``self-evident'' assumption of
occurrence of ``trapped surfaces'' may not be realized atleast in some specific
cosmolog... | [
{
"created": "Thu, 1 Dec 2005 09:10:53 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Dec 2005 11:39:02 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Mitra",
"Abhas",
""
]
] | In a recent preprint, gr-qc/0511123, Dadhich has given a brief yet beautiful exposition on some of the research works by Prof. A.K. Raychaudhuri. Here Dadhich highlights the fact that the apparently ``self-evident'' assumption of occurrence of ``trapped surfaces'' may not be realized atleast in some specific cosmologic... |
1006.2417 | Maurizio Gasperini | A. Barone, M. Gasperini and G. Rotoli | Macroscopic Quantum Tunneling and the "cosmic" Josephson effect | 4 pages, 1 pdf figure. Added references and an inset in Fig. 1,
results unchanged. To appear in Phys. Rev. D (Brief Report) | Phys.Rev.D82:087301,2010 | 10.1103/PhysRevD.82.087301 | BA-TH/628-10 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the possible influence of a cosmic magnetic field on the
macroscopic quantum tunneling process associated, in a cosmological context, to
the decay of the "false vacuum." We find a close analogy with the effects of an
external magnetic field applied to a Josephson junction in the context of
low-temperature/... | [
{
"created": "Fri, 11 Jun 2010 23:12:43 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Sep 2010 10:02:45 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Barone",
"A.",
""
],
[
"Gasperini",
"M.",
""
],
[
"Rotoli",
"G.",
""
]
] | We discuss the possible influence of a cosmic magnetic field on the macroscopic quantum tunneling process associated, in a cosmological context, to the decay of the "false vacuum." We find a close analogy with the effects of an external magnetic field applied to a Josephson junction in the context of low-temperature/hi... |
1606.02932 | Yi Xie | Xu Lu and Feng-Wei Yang and Yi Xie | Strong gravitational field time delay for photons coupled to Weyl tensor
in a Schwarzschild black hole | 8 pages, 3 figures | Eur. Phys. J. C (2016) 76: 357 | 10.1140/epjc/s10052-016-4218-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse strong gravitational field time delay for photons coupled to the
Weyl tensor in a Schwarzschild black hole. By making use of the method of
strong deflection limit, we find that these time delays between relativistic
images are significantly affected by polarization directions of such a
coupling. A practica... | [
{
"created": "Thu, 9 Jun 2016 12:29:50 GMT",
"version": "v1"
}
] | 2016-07-05 | [
[
"Lu",
"Xu",
""
],
[
"Yang",
"Feng-Wei",
""
],
[
"Xie",
"Yi",
""
]
] | We analyse strong gravitational field time delay for photons coupled to the Weyl tensor in a Schwarzschild black hole. By making use of the method of strong deflection limit, we find that these time delays between relativistic images are significantly affected by polarization directions of such a coupling. A practical ... |
gr-qc/0505017 | Arundhati Dasgupta | Arundhati Dasgupta | Semiclassical quantisation of space-times with apparent horizons | 52 pages, 4 figures | Class.Quant.Grav. 23 (2006) 635-672 | 10.1088/0264-9381/23/3/007 | null | gr-qc astro-ph hep-th | null | Coherent or semiclassical states in canonical quantum gravity describe the
classical Schwarzschild space-time. By tracing over the coherent state
wavefunction inside the horizon, a density matrix is derived.
Bekenstein-Hawking entropy is obtained from the density matrix, modulo the
Immirzi parameter. The expectation ... | [
{
"created": "Tue, 3 May 2005 21:38:01 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jan 2006 00:33:03 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Dasgupta",
"Arundhati",
""
]
] | Coherent or semiclassical states in canonical quantum gravity describe the classical Schwarzschild space-time. By tracing over the coherent state wavefunction inside the horizon, a density matrix is derived. Bekenstein-Hawking entropy is obtained from the density matrix, modulo the Immirzi parameter. The expectation va... |
gr-qc/0507100 | Ioannis Raptis | Ioannis Raptis | Finitary Topos for Locally Finite, Causal and Quantal Vacuum Einstein
Gravity | 49 pages, latest updated version (errata corrected, references
polished) Submitted to the International Journal of Theoretical Physics | Int.J.Theor.Phys.46:688-739,2007 | 10.1007/s10773-006-9240-y | null | gr-qc | null | Previous work on applications of Abstract Differential Geometry (ADG) to
discrete Lorentzian quantum gravity is brought to its categorical climax by
organizing the curved finitary spacetime sheaves of quantum causal sets
involved therein, on which a finitary (:locally finite), singularity-free,
background manifold in... | [
{
"created": "Sun, 24 Jul 2005 21:15:25 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Aug 2005 09:35:12 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Sep 2005 11:51:35 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Raptis",
"Ioannis",
""
]
] | Previous work on applications of Abstract Differential Geometry (ADG) to discrete Lorentzian quantum gravity is brought to its categorical climax by organizing the curved finitary spacetime sheaves of quantum causal sets involved therein, on which a finitary (:locally finite), singularity-free, background manifold inde... |
1308.6155 | Xavier Calmet | Xavier Calmet | Effective theory for quantum gravity | 5 pages. This essay received an "honorable mention" in the 2013 Essay
Competition of the Gravity Research Foundation | null | 10.1142/S0218271813420145 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we discuss an effective theory for quantum gravity and discuss
the bounds on the parameters of this effective action. In particular we show
that measurement in pulsars binary systems are unlikely to improve the bounds
on the coefficients of the $R^2$ and $R_{\mu\nu} R^{\mu\nu}$ terms obtained
from prob... | [
{
"created": "Wed, 28 Aug 2013 14:03:13 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Calmet",
"Xavier",
""
]
] | In this paper, we discuss an effective theory for quantum gravity and discuss the bounds on the parameters of this effective action. In particular we show that measurement in pulsars binary systems are unlikely to improve the bounds on the coefficients of the $R^2$ and $R_{\mu\nu} R^{\mu\nu}$ terms obtained from probes... |
gr-qc/0108001 | Stoytcho Yazadjiev | Stoytcho S. Yazadjiev (Sofia University) | Solution generating in scalar-tensor theories with a massless scalar
field and stiff perfect fluid as a source | 10 pages,Revtex; v2 extended version, new parts added and some parts
rewritten, results presented more concisely, some simple examples of
homogeneous solutions replaced with new regular inhomogeneous solutions,
typos corrected, references and acknowledgements added, accepted for
publication in Phys.Rev.D | Phys.Rev.D65:084023,2002 | 10.1103/PhysRevD.65.084023 | null | gr-qc hep-th | null | We present a method for generating solutions in some scalar-tensor theories
with a minimally coupled massless scalar field or irrotational stiff perfect
fluid as a source. The method is based on the group of symmetries of the
dilaton-matter sector in the Einstein frame. In the case of Barker's theory the
dilaton-matt... | [
{
"created": "Wed, 1 Aug 2001 06:19:49 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Jan 2002 11:04:39 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Yazadjiev",
"Stoytcho S.",
"",
"Sofia University"
]
] | We present a method for generating solutions in some scalar-tensor theories with a minimally coupled massless scalar field or irrotational stiff perfect fluid as a source. The method is based on the group of symmetries of the dilaton-matter sector in the Einstein frame. In the case of Barker's theory the dilaton-matter... |
gr-qc/9808024 | Kip S. Thorne | Kip S. Thorne (Caltech and
Max-Planck-Insititut-fur-GravitationsPhysik) | Numerical Relativity for Inspiraling Binaries in Co-Rotating
Coordinates: Test Bed for Lapse and Shift Equations | 4 pages; submitted to Physical Review D15 as a regular article | null | null | null | gr-qc | null | Gravitational-wave data analysis requires a detailed understanding of the
highly relativistic, late stages of inspiral of neutron-star and black-hole
binaries. A promising method to compute the late inspiral and its emitted waves
is numerical relativity in co-rotating coordinates. The coordinates must be
kept co-rota... | [
{
"created": "Sun, 9 Aug 1998 01:16:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Thorne",
"Kip S.",
"",
"Caltech and\n Max-Planck-Insititut-fur-GravitationsPhysik"
]
] | Gravitational-wave data analysis requires a detailed understanding of the highly relativistic, late stages of inspiral of neutron-star and black-hole binaries. A promising method to compute the late inspiral and its emitted waves is numerical relativity in co-rotating coordinates. The coordinates must be kept co-rotati... |
1802.02003 | Yu-Tong Wang | Yu-Tong Wang, Zhi-Peng Li, Jun Zhang, Shuang-Yong Zhou, Yun-Song Piao | Are gravitational wave ringdown echoes always equal-interval ? | 10 pages,5 figures | EPJC 78 (2018) 482 | 10.1140/epjc/s10052-018-5974-y | USTC-ICTS-18-04 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave (GW) ringdown waveforms may contain "echoes" that encode
new physics in the strong gravity regime. It is commonly assumed that the new
physics gives rise to the GW echoes whose intervals are constant. We point out
that this assumption is not always applicable. In particular, if the
post-merger obje... | [
{
"created": "Tue, 6 Feb 2018 15:30:45 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Feb 2018 07:25:52 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Jun 2018 05:20:02 GMT",
"version": "v3"
}
] | 2018-06-14 | [
[
"Wang",
"Yu-Tong",
""
],
[
"Li",
"Zhi-Peng",
""
],
[
"Zhang",
"Jun",
""
],
[
"Zhou",
"Shuang-Yong",
""
],
[
"Piao",
"Yun-Song",
""
]
] | Gravitational wave (GW) ringdown waveforms may contain "echoes" that encode new physics in the strong gravity regime. It is commonly assumed that the new physics gives rise to the GW echoes whose intervals are constant. We point out that this assumption is not always applicable. In particular, if the post-merger object... |
gr-qc/0308026 | Charles Wang | Charles Wang | Nonlinear parametric quantization of gravity and cosmological models | LaTex; 6 pages | null | null | null | gr-qc | null | A generalization of the recently formulated nonlinear quantization of a
parameterized theory is presented in the context of quantum gravity. The
parametric quantization of a Friedmann universe with a massless scalar field is
then considered in terms of analytic solutions of the resulting evolution
equations.
| [
{
"created": "Sun, 10 Aug 2003 17:28:26 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Aug 2003 08:50:57 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Aug 2003 00:15:10 GMT",
"version": "v3"
},
{
"created": "Mon, 18 Aug 2003 10:37:28 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Wang",
"Charles",
""
]
] | A generalization of the recently formulated nonlinear quantization of a parameterized theory is presented in the context of quantum gravity. The parametric quantization of a Friedmann universe with a massless scalar field is then considered in terms of analytic solutions of the resulting evolution equations. |
0812.2767 | Jose M. M. Senovilla | Jos\'e M.M. Senovilla | On the boundary of the region containing trapped surfaces | 16 pages, 1 Table, 3 Figures. Invited talk to appear in the
proceedings of the Spanish Relativity Meeting ERE-08, Salamanca, "Physics and
Mathematics of Gravitation". Largely based on a collaboration with I.
Bengtsson | null | 10.1063/1.3141345 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The boundary of the region in spacetime containing future-trapped closed
surfaces is considered. In asymptotically flat spacetimes, this boundary does
not need to be the event horizon nor a dynamical/trapping horizon. Some
properties of this boundary and its localization are analyzed, and illustrated
with examples. I... | [
{
"created": "Mon, 15 Dec 2008 11:14:19 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Senovilla",
"José M. M.",
""
]
] | The boundary of the region in spacetime containing future-trapped closed surfaces is considered. In asymptotically flat spacetimes, this boundary does not need to be the event horizon nor a dynamical/trapping horizon. Some properties of this boundary and its localization are analyzed, and illustrated with examples. In ... |
0908.2648 | Jerzy Matyjasek | Jerzy Matyjasek and Dariusz Tryniecki | $AdS_{2} \times S^{2}$ geometries and the extreme quantum-corrected
black holes | null | Mod.Phys.Lett.A24:2517-2530,2009 | 10.1142/S0217732309031910 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The second-order term of the approximate stress-energy tensor of the
quantized massive scalar field in the Bertotti-Robinson and Reissner-
Nordstr\"om spacetimes is constructed within the framework of the
Schwinger-DeWitt method. It is shown that although the Bertotti- Robinson
geometry is a self-consistent solution ... | [
{
"created": "Tue, 18 Aug 2009 22:05:14 GMT",
"version": "v1"
}
] | 2010-03-25 | [
[
"Matyjasek",
"Jerzy",
""
],
[
"Tryniecki",
"Dariusz",
""
]
] | The second-order term of the approximate stress-energy tensor of the quantized massive scalar field in the Bertotti-Robinson and Reissner- Nordstr\"om spacetimes is constructed within the framework of the Schwinger-DeWitt method. It is shown that although the Bertotti- Robinson geometry is a self-consistent solution of... |
2403.03982 | Aniruddha Chakraborty | Aniruddha Chakraborty, Suvodip Mukherjee | GLANCE -- Gravitational Lensing Authenticator using Non-Modelled
Cross-Correlation Exploration of Gravitational Wave Signals | 22 pages, 26 figures (including appendices). Accepted for publication
in MNRAS | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Gravitational lensing is the phenomenon where the presence of matter (called
a lens) bends the path of light-like trajectories travelling nearby. Similar to
the geometric optics limit of electromagnetic waves, gravitational lensing of
gravitational waves (GWs) can occur in geometric optics condition when GW
wavelengt... | [
{
"created": "Wed, 6 Mar 2024 19:00:10 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2024 09:54:13 GMT",
"version": "v2"
}
] | 2024-07-24 | [
[
"Chakraborty",
"Aniruddha",
""
],
[
"Mukherjee",
"Suvodip",
""
]
] | Gravitational lensing is the phenomenon where the presence of matter (called a lens) bends the path of light-like trajectories travelling nearby. Similar to the geometric optics limit of electromagnetic waves, gravitational lensing of gravitational waves (GWs) can occur in geometric optics condition when GW wavelength ... |
gr-qc/9502044 | Mark Miller | Mark A. Miller (Syracuse University) | Regge Calculus as a Fourth Order Method in Numerical Relativity | 14 pages, LaTeX, 8 figures mailed in separate file or email author
directly | Class.Quant.Grav. 12 (1995) 3037-3052 | 10.1088/0264-9381/12/12/019 | SU-GP-95/2-1 | gr-qc | null | The convergence properties of numerical Regge calculus as an approximation to
continuum vacuum General Relativity is studied, both analytically and
numerically. The Regge equations are evaluated on continuum spacetimes by
assigning squared geodesic distances in the continuum manifold to the squared
edge lengths in th... | [
{
"created": "Mon, 27 Feb 1995 22:23:59 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Miller",
"Mark A.",
"",
"Syracuse University"
]
] | The convergence properties of numerical Regge calculus as an approximation to continuum vacuum General Relativity is studied, both analytically and numerically. The Regge equations are evaluated on continuum spacetimes by assigning squared geodesic distances in the continuum manifold to the squared edge lengths in the ... |
2308.05025 | Tanisha Joshi | Tanisha Joshi, S.D Pathak | Evolution of Entropy with Cosmic Time | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Understanding the evolution of entropy in the universe is a fundamental
aspect of cosmology. This paper investigates the evolution of entropy in a
spatially flat $K=0$ universe, focusing on the contributions of matter,
radiation, and dark energy components. The study derives the rate of change of
entropy with respect... | [
{
"created": "Wed, 9 Aug 2023 15:44:38 GMT",
"version": "v1"
}
] | 2023-08-10 | [
[
"Joshi",
"Tanisha",
""
],
[
"Pathak",
"S. D",
""
]
] | Understanding the evolution of entropy in the universe is a fundamental aspect of cosmology. This paper investigates the evolution of entropy in a spatially flat $K=0$ universe, focusing on the contributions of matter, radiation, and dark energy components. The study derives the rate of change of entropy with respect t... |
gr-qc/9601026 | Malcolm 'Schizoid' Tobias | Peter Anninos, Joan Masso, Edward Seidel, Wai-Mo Suen, Malcolm Tobias | The Near-Linear Regime of Gravitational Waves in Numerical Relativity | 10 pages, 2 postscript figures, revised text | Phys.Rev.D54:6544-6547,1996 | 10.1103/PhysRevD.54.6544 | wugrav-95-19 | gr-qc | null | We report on a systematic study of the dynamics of gravitational waves in
full 3D numerical relativity. We find that there exists an interesting regime
in the parameter space of the wave configurations: a near-linear regime in
which the amplitude of the wave is low enough that one expects the geometric
deviation from... | [
{
"created": "Wed, 17 Jan 1996 14:57:01 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Oct 1996 15:09:33 GMT",
"version": "v2"
}
] | 2011-09-09 | [
[
"Anninos",
"Peter",
""
],
[
"Masso",
"Joan",
""
],
[
"Seidel",
"Edward",
""
],
[
"Suen",
"Wai-Mo",
""
],
[
"Tobias",
"Malcolm",
""
]
] | We report on a systematic study of the dynamics of gravitational waves in full 3D numerical relativity. We find that there exists an interesting regime in the parameter space of the wave configurations: a near-linear regime in which the amplitude of the wave is low enough that one expects the geometric deviation from f... |
gr-qc/9712044 | Jolien Creighton | Jolien D. E. Creighton (Caltech) | Listening for Ringing Black Holes | 8 pages LaTeX, 1 eps figure included with epsfig, based on a talk
given at the 7th Canadian Conference on General Relativity and Relativistic
Astrophysics | null | null | null | gr-qc | null | The gravitational radiation produced by binary black holes during their
inspiral, merger, and ringdown phases is a promising candidate for detection by
the first or second generation of kilometer-scale interferometric gravitational
wave antennas. Waveforms for the last phase, the quasinormal ringing, are well
underst... | [
{
"created": "Wed, 10 Dec 1997 00:25:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Creighton",
"Jolien D. E.",
"",
"Caltech"
]
] | The gravitational radiation produced by binary black holes during their inspiral, merger, and ringdown phases is a promising candidate for detection by the first or second generation of kilometer-scale interferometric gravitational wave antennas. Waveforms for the last phase, the quasinormal ringing, are well understoo... |
2403.07174 | Debabrata Deb | Debabrata Deb, Manjari Bagchi, Sarmistha Banik | Exploring the Impact of Extra Dimensions on Neutron Star Structure and
Equation of State | 12 pages, 7 figures, 3 tables | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | In this work, we explore the impact of higher dimensional spacetime on the
stellar structure and thermodynamic properties of neutron stars. Utilizing the
density-dependent relativistic hadron field theory, we introduce modifications
to incorporate the influence of higher dimensionality, a novel approach not
explored ... | [
{
"created": "Mon, 11 Mar 2024 21:32:06 GMT",
"version": "v1"
}
] | 2024-03-13 | [
[
"Deb",
"Debabrata",
""
],
[
"Bagchi",
"Manjari",
""
],
[
"Banik",
"Sarmistha",
""
]
] | In this work, we explore the impact of higher dimensional spacetime on the stellar structure and thermodynamic properties of neutron stars. Utilizing the density-dependent relativistic hadron field theory, we introduce modifications to incorporate the influence of higher dimensionality, a novel approach not explored in... |
1910.07292 | Stav Zalel | Fay Dowker, Nazireen Imambaccus, Amelia Owens, Rafael Sorkin, Stav
Zalel | A manifestly covariant framework for causal set dynamics | 32 pages, 12 figures | Class. Quantum Grav. 37 (2020) 085003 | 10.1088/1361-6382/ab719c | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a manifestly covariant framework for causal set dynamics. The
framework is based on a structure, dubbed covtree, which is a partial order on
certain sets of finite, unlabeled causal sets. We show that every infinite path
in covtree corresponds to at least one infinite, unlabeled causal set. We show
that tr... | [
{
"created": "Wed, 16 Oct 2019 11:35:19 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Mar 2020 20:21:44 GMT",
"version": "v2"
}
] | 2020-03-27 | [
[
"Dowker",
"Fay",
""
],
[
"Imambaccus",
"Nazireen",
""
],
[
"Owens",
"Amelia",
""
],
[
"Sorkin",
"Rafael",
""
],
[
"Zalel",
"Stav",
""
]
] | We propose a manifestly covariant framework for causal set dynamics. The framework is based on a structure, dubbed covtree, which is a partial order on certain sets of finite, unlabeled causal sets. We show that every infinite path in covtree corresponds to at least one infinite, unlabeled causal set. We show that tran... |
1809.00618 | David de Wolf Ph.D. | David A. de Wolf | Treatment of an accelerating observer via the special theory of
relativity | 16+ pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The clock time t' of an accelerating observer, simultaneous with the measured
clock time t of an inertial observer,is easily established in special
relativity (as proper time) by the well-known time-dilation formula for t'(t).
In this work, a special-relativity formula t(t') for an initial observer's
clock time t, si... | [
{
"created": "Mon, 3 Sep 2018 14:43:30 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Nov 2018 09:51:48 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Jun 2019 13:05:58 GMT",
"version": "v3"
},
{
"created": "Sun, 30 Jun 2019 13:04:30 GMT",
"version": "v4"
},
{
"cr... | 2019-08-27 | [
[
"de Wolf",
"David A.",
""
]
] | The clock time t' of an accelerating observer, simultaneous with the measured clock time t of an inertial observer,is easily established in special relativity (as proper time) by the well-known time-dilation formula for t'(t). In this work, a special-relativity formula t(t') for an initial observer's clock time t, simu... |
0810.3399 | Tao Mei | T. Mei | Negative kinetic energy term of general relativity and its removing | 9 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We first present a new Lagrangian of general relativity, which can be divided
into kinetic energy term and potential energy term. Taking advantage of
vierbein formalism, we reduce the kinetic energy term to a sum of five positive
terms and one negative term. Some gauge conditions removing the negative
kinetic energy ... | [
{
"created": "Sun, 19 Oct 2008 13:48:39 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jan 2009 12:57:02 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Mar 2009 13:46:24 GMT",
"version": "v3"
},
{
"created": "Mon, 30 Mar 2009 02:38:36 GMT",
"version": "v4"
}
] | 2009-03-30 | [
[
"Mei",
"T.",
""
]
] | We first present a new Lagrangian of general relativity, which can be divided into kinetic energy term and potential energy term. Taking advantage of vierbein formalism, we reduce the kinetic energy term to a sum of five positive terms and one negative term. Some gauge conditions removing the negative kinetic energy te... |
2308.10052 | I. V. Kanatchikov | I.V. Kanatchikov | The De Donder-Weyl Hamiltonian formulation of TEGR and its quantization | 19pp | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The De Donder-Weyl (DW) Hamiltonian theory of fields treats space and time
variables on equal footing. Its quantization, called precanonical quantization,
leads to a hypercomplex generalization of quantum formalism to field theory as
it follows from the quantization of Poisson-Gerstenhaber brackets defined on
differe... | [
{
"created": "Sat, 19 Aug 2023 15:27:56 GMT",
"version": "v1"
}
] | 2023-08-22 | [
[
"Kanatchikov",
"I. V.",
""
]
] | The De Donder-Weyl (DW) Hamiltonian theory of fields treats space and time variables on equal footing. Its quantization, called precanonical quantization, leads to a hypercomplex generalization of quantum formalism to field theory as it follows from the quantization of Poisson-Gerstenhaber brackets defined on different... |
0903.2127 | Guendelman Eduardo I | E.I. Guendelman | String Gas Shells, their Dual Radiation and Hedgehog Signature Control | 7 pages | Phys.Lett.B677:71-73,2009 | 10.1016/j.physletb.2009.05.019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We search for spherically symmetric, stationary solutions with a string gas
shell as a source. The requirement of a uniform newtonian potential, or
constancy of the 00 component of the metric, implies the existence of a "dual"
radiation, which we argue can be interpreted as representing the virtual
quantum fluctuatio... | [
{
"created": "Thu, 12 Mar 2009 09:31:28 GMT",
"version": "v1"
}
] | 2010-01-15 | [
[
"Guendelman",
"E. I.",
""
]
] | We search for spherically symmetric, stationary solutions with a string gas shell as a source. The requirement of a uniform newtonian potential, or constancy of the 00 component of the metric, implies the existence of a "dual" radiation, which we argue can be interpreted as representing the virtual quantum fluctuations... |
gr-qc/9909090 | null | A.A. Pomeransky and R.A. Sen'kov | Quadrupole interaction of relativistic quantum particle with external
fields | 8 pages, no figures | Phys.Lett. B468 (1999) 251-255 | 10.1016/S0370-2693(99)01234-4 | null | gr-qc hep-th physics.acc-ph | null | We consider the motion of a spinning relativistic particle with an arbitrary
value of spin in external electromagnetic and gravitational fields, to first
order in the external field. We use the noncovariant description of spin. An
explicit expression is obtained for the interaction of second order in spin.
The value ... | [
{
"created": "Thu, 30 Sep 1999 06:00:50 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Pomeransky",
"A. A.",
""
],
[
"Sen'kov",
"R. A.",
""
]
] | We consider the motion of a spinning relativistic particle with an arbitrary value of spin in external electromagnetic and gravitational fields, to first order in the external field. We use the noncovariant description of spin. An explicit expression is obtained for the interaction of second order in spin. The value of... |
2110.09077 | Ming Zhang | Ming Zhang and Jie Jiang | Strong cosmic censorship in near-extremal Kerr-Sen-de Sitter spacetime | 9 pages | null | 10.1140/epjc/s10052-021-09753-x | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We first calculate equations of motion for particles in the Kerr-Sen-de
Sitter black hole spacetime. Then in the eikonal regime, we analytically obtain
the quasi-normal resonant modes of massless neutral scalar field perturbation
and find its imaginary part to be characterized by the surface gravity of the
near-extre... | [
{
"created": "Mon, 18 Oct 2021 07:57:15 GMT",
"version": "v1"
}
] | 2021-11-17 | [
[
"Zhang",
"Ming",
""
],
[
"Jiang",
"Jie",
""
]
] | We first calculate equations of motion for particles in the Kerr-Sen-de Sitter black hole spacetime. Then in the eikonal regime, we analytically obtain the quasi-normal resonant modes of massless neutral scalar field perturbation and find its imaginary part to be characterized by the surface gravity of the near-extrema... |
2211.08753 | Sarbari Guha Dr. | Uttaran Ghosh and Sarbari Guha | Vaidya-like exterior solution and formation of singularity in $f(R, T)$
theory of gravity | 14 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the gravitational collapse of a fluid ball undergoing
dissipation in the form of heat flux, in the framework of $f(R,T)$ gravity. To
apply the junction conditions in order to match the interior and the exterior
spacetimes and analyze the dynamics of collapse, it is necessary to know the
exteri... | [
{
"created": "Wed, 16 Nov 2022 08:29:53 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Nov 2022 09:54:48 GMT",
"version": "v2"
},
{
"created": "Sun, 11 Jun 2023 16:59:09 GMT",
"version": "v3"
}
] | 2023-06-13 | [
[
"Ghosh",
"Uttaran",
""
],
[
"Guha",
"Sarbari",
""
]
] | In this paper, we study the gravitational collapse of a fluid ball undergoing dissipation in the form of heat flux, in the framework of $f(R,T)$ gravity. To apply the junction conditions in order to match the interior and the exterior spacetimes and analyze the dynamics of collapse, it is necessary to know the exterior... |
1807.04060 | Soumya Jana | Soumya Jana and Subhendra Mohanty (PRL Ahmedabad, India) | Constraints on $f(R)$ theories of gravity from GW170817 | 22 pages, 1 figure | Phys. Rev. D 99, 044056 (2019) | 10.1103/PhysRevD.99.044056 | null | gr-qc astro-ph.CO astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A novel constraint on $f(R)$ theories of gravity is obtained from the
gravitational wave signal emitted from the binary neutron star merger event
GW170817. The $f(R)$ theories possess an additional massive scalar degree of
freedom apart from the massless spin-2 modes. The corresponding scalar field
contributes an add... | [
{
"created": "Wed, 11 Jul 2018 10:42:30 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Mar 2019 07:08:44 GMT",
"version": "v2"
}
] | 2019-03-04 | [
[
"Jana",
"Soumya",
"",
"PRL Ahmedabad, India"
],
[
"Mohanty",
"Subhendra",
"",
"PRL Ahmedabad, India"
]
] | A novel constraint on $f(R)$ theories of gravity is obtained from the gravitational wave signal emitted from the binary neutron star merger event GW170817. The $f(R)$ theories possess an additional massive scalar degree of freedom apart from the massless spin-2 modes. The corresponding scalar field contributes an addit... |
2111.09647 | Reza Saffari | Solmaz Asgari, and Reza Saffari | Spacetime expansion in the presence of a background velocity field | 25 pages, 12 figures, accepted for publication in European Physical
Journal Plus (EPJP) | null | 10.1140/epjp/s13360-021-02176-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we introduce a new metric assuming an additional
velocity-based term in a spacetime metric. Although the inclusion of this
additional phrase can indicate that the Lorentz symmetry has broken, the
results of null geodesics demonstrate that the amount of variation in the speed
of light is considerably ... | [
{
"created": "Thu, 18 Nov 2021 12:01:02 GMT",
"version": "v1"
}
] | 2021-12-28 | [
[
"Asgari",
"Solmaz",
""
],
[
"Saffari",
"Reza",
""
]
] | In this article, we introduce a new metric assuming an additional velocity-based term in a spacetime metric. Although the inclusion of this additional phrase can indicate that the Lorentz symmetry has broken, the results of null geodesics demonstrate that the amount of variation in the speed of light is considerably sm... |
1112.4663 | Cosimo Bambi | Cosimo Bambi | Towards the use of the most massive black hole candidates in AGN to test
the Kerr paradigm | 12 pages, 6 figures. v2: some typos corrected | Phys.Rev.D85:043001,2012 | 10.1103/PhysRevD.85.043001 | LMU-ASC-28-12 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The super-massive objects in galactic nuclei are thought to be the Kerr black
holes predicted by General Relativity, although a definite proof of their
actual nature is still lacking. The most massive objects in AGN ($M \sim 10^9
M_\odot$) seem to have a high radiative efficiency ($\eta \sim 0.4$) and a
moderate mass... | [
{
"created": "Tue, 20 Dec 2011 11:51:50 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jan 2012 18:01:37 GMT",
"version": "v2"
}
] | 2012-04-09 | [
[
"Bambi",
"Cosimo",
""
]
] | The super-massive objects in galactic nuclei are thought to be the Kerr black holes predicted by General Relativity, although a definite proof of their actual nature is still lacking. The most massive objects in AGN ($M \sim 10^9 M_\odot$) seem to have a high radiative efficiency ($\eta \sim 0.4$) and a moderate mass a... |
gr-qc/9903036 | Alejandro Jakubi | Luis P. Chimento, Alejandro S. Jakubi and Diego Pavon | Stability of inflationary solutions driven by a changing dissipative
fluid | 17 pages, LaTeX 2.09, 2 figures. To be published in Classical and
Quantum Gravity | Class.Quant.Grav. 16 (1999) 1625-1635 | 10.1088/0264-9381/16/5/312 | null | gr-qc | null | In this paper the second Lyapunov method is used to study the stability of
the de Sitter phase of cosmic expansion when the source of the gravitational
field is a viscous fluid. Different inflationary scenarios related with
reheating and decay of mini-blackholes into radiation are investigated using an
effective flui... | [
{
"created": "Tue, 9 Mar 1999 19:38:45 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Mar 1999 01:10:08 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Chimento",
"Luis P.",
""
],
[
"Jakubi",
"Alejandro S.",
""
],
[
"Pavon",
"Diego",
""
]
] | In this paper the second Lyapunov method is used to study the stability of the de Sitter phase of cosmic expansion when the source of the gravitational field is a viscous fluid. Different inflationary scenarios related with reheating and decay of mini-blackholes into radiation are investigated using an effective fluid ... |
2301.07680 | Miika Sarkkinen | Niko Jokela, K. Kajantie, Miika Sarkkinen | Gravitational wave memory in conformally flat spacetimes | 27 pages, 1 figure; v2: a new paragraph added at the beginning of
Sec. 3, reference to Fig. 1 added in the text, typos corrected, published
version | JHEP05 (2023) 055 | 10.1007/JHEP05(2023)055 | HIP-2023-3/TH | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational wave memory effect in spacetimes related to flat
space by a conformal transformation. The discussion is general but the
gravitational wave length scale is assumed to be small compared with the
background curvature radius. The general formulas are applied to
Friedmann-Robertson-Walker metric... | [
{
"created": "Wed, 18 Jan 2023 17:59:25 GMT",
"version": "v1"
},
{
"created": "Wed, 10 May 2023 11:32:53 GMT",
"version": "v2"
}
] | 2023-05-11 | [
[
"Jokela",
"Niko",
""
],
[
"Kajantie",
"K.",
""
],
[
"Sarkkinen",
"Miika",
""
]
] | We study the gravitational wave memory effect in spacetimes related to flat space by a conformal transformation. The discussion is general but the gravitational wave length scale is assumed to be small compared with the background curvature radius. The general formulas are applied to Friedmann-Robertson-Walker metrics ... |
1310.0711 | Mariafelicia De Laurentis Professor | Mariafelicia De Laurentis and Ivan De Martino | Probing the physical and mathematical structure of $f(R)$ gravity by PSR
$J0348+0432$ | 6 pages, 1 figure, accepted in International Journal of Geometric
Methods in Modern Physics | null | 10.1142/S0219887815500401 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are several approaches to extend General Relativity in order to explain
the phenomena related to the Dark Matter and Dark Energy. These theories,
generally called Extended Theories of Gravity, can be tested using observations
coming from relativistic binary systems as PSR $J0348+0432$. Using a class of
analytic... | [
{
"created": "Wed, 2 Oct 2013 14:11:50 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Feb 2014 11:39:05 GMT",
"version": "v2"
},
{
"created": "Wed, 12 Nov 2014 12:07:50 GMT",
"version": "v3"
}
] | 2015-06-24 | [
[
"De Laurentis",
"Mariafelicia",
""
],
[
"De Martino",
"Ivan",
""
]
] | There are several approaches to extend General Relativity in order to explain the phenomena related to the Dark Matter and Dark Energy. These theories, generally called Extended Theories of Gravity, can be tested using observations coming from relativistic binary systems as PSR $J0348+0432$. Using a class of analytical... |
2207.05117 | Marcus Reitz | Marcus Reitz, D\'aniel N\'emeth, Damodar Rajbhandari, Andrzej
G\"orlich, Jakub Gizbert-Studnicki | Generalised spectral dimensions in non-perturbative quantum gravity | 35 pages, 18 figures | Class. Quantum Grav. 40 (2023) 125003 | 10.1088/1361-6382/acd0fc | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The seemingly universal phenomenon of scale-dependent effective dimensions in
non-perturbative theories of quantum gravity has been shown to be a potential
source of quantum gravity phenomenology. The scale-dependent effective
dimension from quantum gravity has only been considered for scalar fields. It
is however po... | [
{
"created": "Mon, 11 Jul 2022 18:22:39 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Nov 2022 10:22:36 GMT",
"version": "v2"
}
] | 2023-05-16 | [
[
"Reitz",
"Marcus",
""
],
[
"Németh",
"Dániel",
""
],
[
"Rajbhandari",
"Damodar",
""
],
[
"Görlich",
"Andrzej",
""
],
[
"Gizbert-Studnicki",
"Jakub",
""
]
] | The seemingly universal phenomenon of scale-dependent effective dimensions in non-perturbative theories of quantum gravity has been shown to be a potential source of quantum gravity phenomenology. The scale-dependent effective dimension from quantum gravity has only been considered for scalar fields. It is however poss... |
gr-qc/9507052 | Jolien Creighton | Jolien Creighton and Robert Mann | Quailocal Formalism for Dilaton Gravity with Yang-Mills Fields | 5 pages. Uses AMS-TeX preprint style. Submitted to the proceedings of
the 6th Canadian Conference on General Relativity and Relativistic
Astrophysics | null | null | null | gr-qc | null | We present a quasilocal formalism, based on the one proposed by Brown and
York, for dilaton gravity with Yang-Mills fields. For solutions possessing
sufficient symmetry, we define conserved quantities such as mass, angular
momentum, and charge. We also present a micro-canonical action and use it to
arrive at a quasil... | [
{
"created": "Wed, 26 Jul 1995 17:31:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Creighton",
"Jolien",
""
],
[
"Mann",
"Robert",
""
]
] | We present a quasilocal formalism, based on the one proposed by Brown and York, for dilaton gravity with Yang-Mills fields. For solutions possessing sufficient symmetry, we define conserved quantities such as mass, angular momentum, and charge. We also present a micro-canonical action and use it to arrive at a quasiloc... |
gr-qc/9802011 | Mark E. Rupright | M. E. Rupright, A. M. Abrahams, L. Rezzolla | Cauchy-perturbative matching and outer boundary conditions I: Methods
and tests | 13 pages, 6 figures, RevTeX | Phys.Rev. D58 (1998) 044005 | 10.1103/PhysRevD.58.044005 | TAR-064-UNC | gr-qc | null | We present a new method of extracting gravitational radiation from
three-dimensional numerical relativity codes and providing outer boundary
conditions. Our approach matches the solution of a Cauchy evolution of
Einstein's equations to a set of one-dimensional linear wave equations on a
curved background. We illustra... | [
{
"created": "Tue, 3 Feb 1998 19:23:54 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Rupright",
"M. E.",
""
],
[
"Abrahams",
"A. M.",
""
],
[
"Rezzolla",
"L.",
""
]
] | We present a new method of extracting gravitational radiation from three-dimensional numerical relativity codes and providing outer boundary conditions. Our approach matches the solution of a Cauchy evolution of Einstein's equations to a set of one-dimensional linear wave equations on a curved background. We illustrate... |
1506.04569 | Janilo Santos | Noelia S. Santos and Janilo Santos | The virial theorem in Eddington-Born-Infeld gravity | 15 pages; no figures. Improved version, some comments and References
added. Submitted to publication. arXiv admin note: text overlap with
arXiv:0710.0966, arXiv:1212.5817 by other authors | JCAP 12 (2015) 002 | 10.1088/1475-7516/2015/12/002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the possibility that the Eddington-Born-Infeld (EBI) modified
gravity provides an alternative explanation for the mass discrepancy in
clusters of galaxies. For this purpose we derive the modified Einstein field
equations, finding an additional "geometrical mass" term which provides an
effective contributi... | [
{
"created": "Mon, 15 Jun 2015 12:39:00 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Aug 2015 18:18:53 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Aug 2015 22:12:27 GMT",
"version": "v3"
},
{
"created": "Wed, 28 Oct 2015 15:24:11 GMT",
"version": "v4"
}
] | 2015-12-07 | [
[
"Santos",
"Noelia S.",
""
],
[
"Santos",
"Janilo",
""
]
] | We consider the possibility that the Eddington-Born-Infeld (EBI) modified gravity provides an alternative explanation for the mass discrepancy in clusters of galaxies. For this purpose we derive the modified Einstein field equations, finding an additional "geometrical mass" term which provides an effective contribution... |
1508.01614 | Arman Akbarian | Arman Akbarian, Matthew W. Choptuik | Black hole critical behaviour with the generalized BSSN formulation | Minor revisions in response to referee's comments | Phys. Rev. D 92, 084037 (2015) | 10.1103/PhysRevD.92.084037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The development of hyperbolic formulations of Einstein's equations has
revolutionized our ability to perform long-time, stable, accurate numerical
simulations of strong field gravitational phenomena. However, hyperbolic
methods have seen relatively little application in one area of interest, type
II critical collapse... | [
{
"created": "Fri, 7 Aug 2015 06:04:36 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Oct 2015 01:27:41 GMT",
"version": "v2"
}
] | 2015-10-21 | [
[
"Akbarian",
"Arman",
""
],
[
"Choptuik",
"Matthew W.",
""
]
] | The development of hyperbolic formulations of Einstein's equations has revolutionized our ability to perform long-time, stable, accurate numerical simulations of strong field gravitational phenomena. However, hyperbolic methods have seen relatively little application in one area of interest, type II critical collapse, ... |
1805.05264 | Larry Ford | H.S. Vieira, L.H. Ford, and V.B. Bezerra | Spacetime geometry fluctuations and geodesic deviation | 27 pages, 3 figures | Phys. Rev. D 98, 086001 (2018) | 10.1103/PhysRevD.98.086001 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantum fluctuations of the geodesic deviation equation in a flat
background spacetime are discussed. We calculate the resulting mean squared
fluctuations in the relative velocity and separation of test particles. The
effect of these quantum fluctuations of the spacetime geometry is given in
terms of the Riemann ... | [
{
"created": "Mon, 14 May 2018 16:29:07 GMT",
"version": "v1"
}
] | 2018-10-10 | [
[
"Vieira",
"H. S.",
""
],
[
"Ford",
"L. H.",
""
],
[
"Bezerra",
"V. B.",
""
]
] | The quantum fluctuations of the geodesic deviation equation in a flat background spacetime are discussed. We calculate the resulting mean squared fluctuations in the relative velocity and separation of test particles. The effect of these quantum fluctuations of the spacetime geometry is given in terms of the Riemann te... |
2206.11870 | Erik Aurell | Erik Aurell | The double doors of the horizon | 5 pages, 57 references. The text of the revised version is partly
reorganized, and additional references are cited | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | In statistical mechanics entropy is a measure of disorder obeying Boltzmann's
formula $S=\log{\cal N}$, where ${\cal N}$ is the accessible phase space
volume. In black hole thermodynamics one associates to a black hole an entropy
Bekenstein-Hawking $S_{BH}$. It is well known that $S_{BH}$ is very large for
astrophysi... | [
{
"created": "Wed, 22 Jun 2022 17:49:53 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Aug 2022 13:25:34 GMT",
"version": "v2"
}
] | 2022-08-11 | [
[
"Aurell",
"Erik",
""
]
] | In statistical mechanics entropy is a measure of disorder obeying Boltzmann's formula $S=\log{\cal N}$, where ${\cal N}$ is the accessible phase space volume. In black hole thermodynamics one associates to a black hole an entropy Bekenstein-Hawking $S_{BH}$. It is well known that $S_{BH}$ is very large for astrophysica... |
gr-qc/9810052 | Aleksandar Bogojevic | Aleksandar Bogojevic (Institute of Physics) and Dejan Stojkovic (Case
Western Reserve University) | Black Holes Without Singularities | 5 pages, Latex 2e, 1 figure, Lectures given at 11th Yugoslav
Symposium on Nuclear and Particle Physics, Studenica, September 1998 | null | null | IP-HET-98/24 | gr-qc | null | We study the properties of a completely integrable deformation of the CGHS
dilaton gravity model in two dimensions. The solution is shown to represent a
singularity free black hole that at large distances asymptoticaly joins to the
CGHS solution.
| [
{
"created": "Thu, 15 Oct 1998 22:45:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bogojevic",
"Aleksandar",
"",
"Institute of Physics"
],
[
"Stojkovic",
"Dejan",
"",
"Case\n Western Reserve University"
]
] | We study the properties of a completely integrable deformation of the CGHS dilaton gravity model in two dimensions. The solution is shown to represent a singularity free black hole that at large distances asymptoticaly joins to the CGHS solution. |
2402.06096 | Xiaoming Bi | Xiaoming Bi, Zhongkai Guo, Xiaobo Zou, Yong Huang, Peijia Li, Jianfeng
Cao, Lue Chen, Wenlin Tang and Yun Kau Lau | Doppler Tracking Data of Martian Mission Tianwen-I and Upper Limit of
Stochastic Gravitational Wave Background | 10 pages, 8 figures | null | null | null | gr-qc astro-ph.EP astro-ph.IM physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two way ranging data for spacecraft tracking of China's first Martian mission
Tianwen-I is analysed. Shortly before the spacecraft entered the Mars parking
orbit, the two way coherent microwave link between the spacecraft and the Earth
resembles a long arm gravitational wave interferometer, with both the
spacecraft a... | [
{
"created": "Thu, 8 Feb 2024 23:11:16 GMT",
"version": "v1"
}
] | 2024-02-12 | [
[
"Bi",
"Xiaoming",
""
],
[
"Guo",
"Zhongkai",
""
],
[
"Zou",
"Xiaobo",
""
],
[
"Huang",
"Yong",
""
],
[
"Li",
"Peijia",
""
],
[
"Cao",
"Jianfeng",
""
],
[
"Chen",
"Lue",
""
],
[
"Tang",
"Wenlin",... | Two way ranging data for spacecraft tracking of China's first Martian mission Tianwen-I is analysed. Shortly before the spacecraft entered the Mars parking orbit, the two way coherent microwave link between the spacecraft and the Earth resembles a long arm gravitational wave interferometer, with both the spacecraft and... |
gr-qc/0212035 | Yuki Uchida | Daisuke Ida, Yuki Uchida and Yoshiyuki Morisawa | The scalar perturbation of the higher-dimensional rotating black holes | 16 pages, 7 figures, revised version | Phys.Rev. D67 (2003) 084019 | 10.1103/PhysRevD.67.084019 | null | gr-qc hep-th | null | The massless scalar field in the higher-dimensional Kerr black hole (Myers-
Perry solution with a single rotation axis) has been investigated. It has been
shown that the field equation is separable in arbitrary dimensions. The
quasi-normal modes of the scalar field have been searched in five dimensions
using the cont... | [
{
"created": "Sun, 8 Dec 2002 07:23:44 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Jan 2003 08:23:42 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Ida",
"Daisuke",
""
],
[
"Uchida",
"Yuki",
""
],
[
"Morisawa",
"Yoshiyuki",
""
]
] | The massless scalar field in the higher-dimensional Kerr black hole (Myers- Perry solution with a single rotation axis) has been investigated. It has been shown that the field equation is separable in arbitrary dimensions. The quasi-normal modes of the scalar field have been searched in five dimensions using the contin... |
2208.04051 | Valerio Faraoni | Valerio Faraoni, Serena Giardino, Andrea Giusti, and Robert Vanderwee | Scalar field as a perfect fluid: thermodynamics of minimally coupled
scalars and Einstein frame scalar-tensor gravity | 19 pages, latex | null | 10.1140/epjc/s10052-023-11186-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the analogy between a minimally coupled scalar field in general
relativity and a perfect fluid, correcting previous identifications of
effective temperature and chemical potential. This provides a useful
complementary picture for the first-order thermodynamics of scalar-tensor
gravity, paving the way for t... | [
{
"created": "Mon, 8 Aug 2022 10:49:03 GMT",
"version": "v1"
}
] | 2023-02-01 | [
[
"Faraoni",
"Valerio",
""
],
[
"Giardino",
"Serena",
""
],
[
"Giusti",
"Andrea",
""
],
[
"Vanderwee",
"Robert",
""
]
] | We revisit the analogy between a minimally coupled scalar field in general relativity and a perfect fluid, correcting previous identifications of effective temperature and chemical potential. This provides a useful complementary picture for the first-order thermodynamics of scalar-tensor gravity, paving the way for the... |
1808.02751 | Kimet Jusufi | Kimet Jusufi, Ayan Banerjee, Galin Gyulchev, Muhammed Amir | Distinguishing rotating naked singularities from Kerr-like wormholes by
their deflection angles of massive particles | 24 pages, 3 figures, accepted for publication in European Physical
Journal C | Eur. Phys. J. C (2019) 79:28 | 10.1140/epjc/s10052-019-6557-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational deflection of relativistic massive particles by
Janis-Newman-Winicour (JNW) spacetimes (also known as a rotating source with a
surface-like naked singularity), and a rotating Kerr-like wormholes. Based on
the recent article [K. Jusufi, Phys. Rev. D 98, 064017 (2018)], we extend some
of thes... | [
{
"created": "Wed, 8 Aug 2018 13:15:17 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jan 2019 16:40:52 GMT",
"version": "v2"
}
] | 2019-01-17 | [
[
"Jusufi",
"Kimet",
""
],
[
"Banerjee",
"Ayan",
""
],
[
"Gyulchev",
"Galin",
""
],
[
"Amir",
"Muhammed",
""
]
] | We study the gravitational deflection of relativistic massive particles by Janis-Newman-Winicour (JNW) spacetimes (also known as a rotating source with a surface-like naked singularity), and a rotating Kerr-like wormholes. Based on the recent article [K. Jusufi, Phys. Rev. D 98, 064017 (2018)], we extend some of these ... |
2012.12128 | LSC P&P Committee | The LIGO Scientific Collaboration and the Virgo Collaboration: R.
Abbott, T. D. Abbott, S. Abraham, F. Acernese, K. Ackley, A. Adams, C. Adams,
R. X. Adhikari, V. B. Adya, C. Affeldt, D. Agarwal, M. Agathos, K. Agatsuma,
N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, K. M. Aleman, G.
Allen, A. Allocca,... | All-sky search in early O3 LIGO data for continuous gravitational-wave
signals from unknown neutron stars in binary systems | 23 pages, 12 figures, 7 tables | Phys. Rev. D 103, 064017 (2021) | 10.1103/PhysRevD.103.064017 | LIGO-P2000298 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rapidly spinning neutron stars are promising sources of persistent,
continuous gravitational waves. Detecting such a signal would allow probing of
the physical properties of matter under extreme conditions. A significant
fraction of the known pulsar population belongs to binary systems. Searching
for unknown neutron ... | [
{
"created": "Tue, 22 Dec 2020 16:06:23 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Mar 2021 14:21:37 GMT",
"version": "v2"
}
] | 2021-03-22 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abraham",
"S.",
""
],
[
"Acernese",
"F.",
""
],
[
"Ackley",
"K.",
... | Rapidly spinning neutron stars are promising sources of persistent, continuous gravitational waves. Detecting such a signal would allow probing of the physical properties of matter under extreme conditions. A significant fraction of the known pulsar population belongs to binary systems. Searching for unknown neutron st... |
gr-qc/0407096 | Hossein Shojaie | Hossein Shojaie, Mehrdad Farhoudi | A cosmology with variable c | 10 pages | Can.J.Phys.84:933-944,2006 | 10.1139/P06-070 | null | gr-qc astro-ph | null | A new varying-$c$ cosmological model constructed using two additional
assumptions, which was introduced in our previous work, is briefly reviewed and
the dynamic equation of the model is derived distinctly from a semi-Newtonian
approach. The results of this model, using a $\Lambda$ term and an extra
energy-momentum t... | [
{
"created": "Mon, 26 Jul 2004 14:24:52 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Nov 2006 20:02:25 GMT",
"version": "v2"
}
] | 2010-09-28 | [
[
"Shojaie",
"Hossein",
""
],
[
"Farhoudi",
"Mehrdad",
""
]
] | A new varying-$c$ cosmological model constructed using two additional assumptions, which was introduced in our previous work, is briefly reviewed and the dynamic equation of the model is derived distinctly from a semi-Newtonian approach. The results of this model, using a $\Lambda$ term and an extra energy-momentum ten... |
gr-qc/0401079 | Muhammad Sharif | M. Sharif and T. Iqbal | Non-Static Spherically Symmetric Perfect Fluid Solutions | null | Chin.J.Phys. 40 (2002) 242-250 | null | null | gr-qc | null | We investigate solutions of Einstein field equations for the non-static
spherically symmetric perfect fluid case using different equations of state.
The properties of an exact spherically symmetric perfect fluid solutions are
obtained which contain shear. We obtain three different solutions out of these
one turns out... | [
{
"created": "Mon, 19 Jan 2004 06:01:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sharif",
"M.",
""
],
[
"Iqbal",
"T.",
""
]
] | We investigate solutions of Einstein field equations for the non-static spherically symmetric perfect fluid case using different equations of state. The properties of an exact spherically symmetric perfect fluid solutions are obtained which contain shear. We obtain three different solutions out of these one turns out t... |
1103.3679 | Jose Geraldo Pereira | J. P. Beltran Almeida, C. S. O. Mayor, J. G. Pereira | de Sitter relativity: a natural scenario for an evolving Lambda | V1: 11 pages. V2: Presentation changes, new discussion added, 13
pages | Grav. Cosm. 18 (2012) 181-187 | 10.1134/S0202289312030012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dispersion relation of de Sitter special relativity is obtained in a
simple and compact form, which is formally similar to the dispersion relation
of ordinary special relativity. It is manifestly invariant under change of
scale of mass, energy and momentum, and can thus be applied at any energy
scale. When applie... | [
{
"created": "Fri, 18 Mar 2011 18:00:58 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Aug 2011 18:13:29 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Almeida",
"J. P. Beltran",
""
],
[
"Mayor",
"C. S. O.",
""
],
[
"Pereira",
"J. G.",
""
]
] | The dispersion relation of de Sitter special relativity is obtained in a simple and compact form, which is formally similar to the dispersion relation of ordinary special relativity. It is manifestly invariant under change of scale of mass, energy and momentum, and can thus be applied at any energy scale. When applied ... |
gr-qc/9211013 | null | Daniel Cangemi, Martin Leblanc and Robert B. Mann | Gauge Formulation of the Spinning Black Hole in (2+1)-Dimensional
Anti-de Sitter Space | 10 pages | Phys.Rev. D48 (1993) 3606-3610 | 10.1103/PhysRevD.48.3606 | CTP#2162, WATPHYS-TH92/09 | gr-qc hep-th | null | We compute the group element of SO(2,2) associated with the spinning black
hole found by Ba\~nados, Teitelboim and Zanelli in (2+1)-dimensional anti-de
Sitter space-time. We show that their metric is built with SO(2,2) gauge
invariant quantities and satisfies Einstein's equations with negative
cosmological constant e... | [
{
"created": "Mon, 9 Nov 1992 21:55:35 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Cangemi",
"Daniel",
""
],
[
"Leblanc",
"Martin",
""
],
[
"Mann",
"Robert B.",
""
]
] | We compute the group element of SO(2,2) associated with the spinning black hole found by Ba\~nados, Teitelboim and Zanelli in (2+1)-dimensional anti-de Sitter space-time. We show that their metric is built with SO(2,2) gauge invariant quantities and satisfies Einstein's equations with negative cosmological constant eve... |
0804.3584 | Luis Herrera | L. Herrera, A. Di Prisco, E. Fuenmayor, O. Troconis | Dynamics of viscous dissipative gravitational collapse: A full causal
approach | 22 pages Latex. To appear in Int. J. Mod. Phys. D. Typos corrected | Int.J.Mod.Phys.D18:129-145,2009 | 10.1142/S0218271809014285 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Misner and Sharp approach to the study of gravitational collapse is
extended to the viscous dissipative case in, both, the streaming out and the
diffusion approximations. The dynamical equation is then coupled to causal
transport equations for the heat flux, the shear and the bulk viscosity, in the
context of Isr... | [
{
"created": "Tue, 22 Apr 2008 18:50:26 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Mar 2009 10:05:26 GMT",
"version": "v2"
}
] | 2009-03-24 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
],
[
"Fuenmayor",
"E.",
""
],
[
"Troconis",
"O.",
""
]
] | The Misner and Sharp approach to the study of gravitational collapse is extended to the viscous dissipative case in, both, the streaming out and the diffusion approximations. The dynamical equation is then coupled to causal transport equations for the heat flux, the shear and the bulk viscosity, in the context of Israe... |
2004.02934 | Eric D. Carlson | Sarah B. Fisher and Eric D. Carlson | Response to Comment on "Reexamining $f(R,T)$ Gravity'' | null | null | 10.1103/PhysRevD.101.108502 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Harko and Moraes claim that in $f(R,T)$ gravity with $f(R,T)=f_1(R)+f_2(T)$,
the term $f_2(T)$ cannot be incorporated in the matter Lagrangian ${\cal L}_m$.
A careful examination of their Comment finds that they have made several
dubious assumptions without indicating any errors in our work. Most notably,
they have u... | [
{
"created": "Mon, 6 Apr 2020 18:50:33 GMT",
"version": "v1"
}
] | 2020-06-24 | [
[
"Fisher",
"Sarah B.",
""
],
[
"Carlson",
"Eric D.",
""
]
] | Harko and Moraes claim that in $f(R,T)$ gravity with $f(R,T)=f_1(R)+f_2(T)$, the term $f_2(T)$ cannot be incorporated in the matter Lagrangian ${\cal L}_m$. A careful examination of their Comment finds that they have made several dubious assumptions without indicating any errors in our work. Most notably, they have unj... |
2405.10671 | Hyat Huang | Carlos Herdeiro, Hyat Huang, Jutta Kunz and Eugen Radu | Einstein-(complex)-Maxwell static boson stars in AdS | 13 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a model with two real Maxwell fields (or equivalently, a complex
Maxwell field) minimally coupled to Einsteins gravity with a negative
cosmological constant in four spacetime dimensions. Assuming a specific
harmonic dependence of the vector fields, we show the existence of
asymptotically anti-de Sitter (A... | [
{
"created": "Fri, 17 May 2024 10:04:11 GMT",
"version": "v1"
}
] | 2024-05-20 | [
[
"Herdeiro",
"Carlos",
""
],
[
"Huang",
"Hyat",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Radu",
"Eugen",
""
]
] | We consider a model with two real Maxwell fields (or equivalently, a complex Maxwell field) minimally coupled to Einsteins gravity with a negative cosmological constant in four spacetime dimensions. Assuming a specific harmonic dependence of the vector fields, we show the existence of asymptotically anti-de Sitter (AdS... |
1509.00706 | Rathin Adhikari | Vikram Soni, Naresh Dadhich, Rathin Adhikari | The cosmological constant from the zero point energy of compact
dimensions | 6 pages | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider extra compact dimensions as the origin of a cosmological
universal energy density in the regular dimensions, with only graviton fields
propagating in the compact space dimensions. The quantum zero point energy
originating from the finite size boundary condition in the compact dimensions
can produce a cons... | [
{
"created": "Wed, 2 Sep 2015 13:55:40 GMT",
"version": "v1"
}
] | 2015-09-03 | [
[
"Soni",
"Vikram",
""
],
[
"Dadhich",
"Naresh",
""
],
[
"Adhikari",
"Rathin",
""
]
] | We consider extra compact dimensions as the origin of a cosmological universal energy density in the regular dimensions, with only graviton fields propagating in the compact space dimensions. The quantum zero point energy originating from the finite size boundary condition in the compact dimensions can produce a consta... |
2006.10068 | Marius Oltean | Marius Oltean, Hossein Bazrafshan Moghaddam, Richard J. Epp | Energy of cosmological spacetimes and perturbations: a quasilocal
approach | v1: 28 pages, 3 figures; v2: 30 pages. References and comments added;
v3: 35 pages. New subsection (IV A) added | Class. Quantum Grav. 38, 085012 (2021) | 10.1088/1361-6382/abeae3 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasilocal definitions of stress-energy-momentum -- that is, in the form of
boundary densities (rather than local volume densities) -- have proven
generally very useful in formulating and applying conservation laws in general
relativity. In this paper, we present a detailed application of such
definitions to cosmolog... | [
{
"created": "Wed, 17 Jun 2020 18:00:05 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Oct 2020 17:20:21 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Feb 2021 13:07:55 GMT",
"version": "v3"
}
] | 2021-04-27 | [
[
"Oltean",
"Marius",
""
],
[
"Moghaddam",
"Hossein Bazrafshan",
""
],
[
"Epp",
"Richard J.",
""
]
] | Quasilocal definitions of stress-energy-momentum -- that is, in the form of boundary densities (rather than local volume densities) -- have proven generally very useful in formulating and applying conservation laws in general relativity. In this paper, we present a detailed application of such definitions to cosmology,... |
1411.2705 | Seyen Kouwn | Seyen Kouwn, O-Kab Kwon and Phillial Oh | Large Scale Suppression of Scalar Power on a Spatial Condensation | 20 pages, 3 figures. Revised version, accepted for publication in PRD | Phys. Rev. D 91, 063521 (2015) | 10.1103/PhysRevD.91.063521 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Suppression of the scalar power spectrum on large scales is one way to
reconcile the tension between Planck and BICEP2 data. This suppression can
occur by introducing a phase transition from the fast-roll phase to the
slow-roll phase in a single field inflation model. In this paper we consider a
deformed single field... | [
{
"created": "Tue, 11 Nov 2014 05:46:20 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Mar 2015 01:23:09 GMT",
"version": "v2"
}
] | 2015-03-25 | [
[
"Kouwn",
"Seyen",
""
],
[
"Kwon",
"O-Kab",
""
],
[
"Oh",
"Phillial",
""
]
] | Suppression of the scalar power spectrum on large scales is one way to reconcile the tension between Planck and BICEP2 data. This suppression can occur by introducing a phase transition from the fast-roll phase to the slow-roll phase in a single field inflation model. In this paper we consider a deformed single field i... |
gr-qc/9509046 | Andrew Chamblin | Andrew Chamblin | Topology and Causal Structure | uuencoded file containing slightly revised and improved version of 20
pages LaTeX with four figures, expanded version of a talk presented at the
6th Canadian Conference on General Relativity and Relativistic Astrophysics | null | null | DAMTP R95/39 | gr-qc | null | We investigate the causal structure of spacetimes $(M, g)$ for which the
metric $g$ is singular on a set of points.
| [
{
"created": "Mon, 25 Sep 1995 20:02:42 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jul 1996 23:21:34 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Chamblin",
"Andrew",
""
]
] | We investigate the causal structure of spacetimes $(M, g)$ for which the metric $g$ is singular on a set of points. |
2304.01695 | Peng Zhao | Peng Zhao, David Hilditch, and Juan A. Valiente Kroon | Trapped surface formation for the Einstein-Scalar system | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider the formation of trapped surfaces in the evolution of
the Einstein-scalar field system without symmetries. To this end, we
follow An's strategy to analyse the formation of trapped surfaces in
vacuum and for the Einstein-Maxwell system. Accordingly, we set up a
characteristic initial value problem ... | [
{
"created": "Tue, 4 Apr 2023 10:48:35 GMT",
"version": "v1"
}
] | 2023-04-05 | [
[
"Zhao",
"Peng",
""
],
[
"Hilditch",
"David",
""
],
[
"Kroon",
"Juan A. Valiente",
""
]
] | We consider the formation of trapped surfaces in the evolution of the Einstein-scalar field system without symmetries. To this end, we follow An's strategy to analyse the formation of trapped surfaces in vacuum and for the Einstein-Maxwell system. Accordingly, we set up a characteristic initial value problem (CIVP) for... |
1001.3631 | Gaurav Khanna | Gaurav Khanna, Justin McKennon | Numerical modeling of gravitational wave sources accelerated by OpenCL | 15 pages, 4 figures, published in (Elsevier) Computer Physics
Communications | Comput.Phys.Commun.181:1605-1611,2010 | 10.1016/j.cpc.2010.05.014 | null | gr-qc physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we make use of the OpenCL framework to accelerate an EMRI
modeling application using the hardware accelerators -- Cell BE and Tesla CUDA
GPU. We describe these compute technologies and our parallelization approach in
detail, present our performance results, and then compare them with those from
our prev... | [
{
"created": "Wed, 20 Jan 2010 16:10:28 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jun 2010 14:17:08 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Oct 2011 00:56:05 GMT",
"version": "v3"
}
] | 2011-10-05 | [
[
"Khanna",
"Gaurav",
""
],
[
"McKennon",
"Justin",
""
]
] | In this work, we make use of the OpenCL framework to accelerate an EMRI modeling application using the hardware accelerators -- Cell BE and Tesla CUDA GPU. We describe these compute technologies and our parallelization approach in detail, present our performance results, and then compare them with those from our previo... |
1705.03772 | Etera R. Livine | Jibril Ben Achour, Etera R. Livine | The Thiemann Complexifier and the CVH algebra for Classical and Quantum
FLRW Cosmology | 38 pages; Corrected version accepted for publication in PRD with
clarifications on role of Immirzi parameter and minimal volume | Phys. Rev. D 96, 066025 (2017) | 10.1103/PhysRevD.96.066025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of Loop Quantum Gravity (LQG), we study the fate of Thiemann
complexifier in homogeneous and isotropic FRW cosmology. The complexifier is
the dilatation operator acting on the canonical phase space for gravity and
generates the canonical transformations shifting the Barbero-Immirzi parameter.
We focus ... | [
{
"created": "Wed, 10 May 2017 13:54:50 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Aug 2017 14:54:33 GMT",
"version": "v2"
}
] | 2017-09-27 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Livine",
"Etera R.",
""
]
] | In the context of Loop Quantum Gravity (LQG), we study the fate of Thiemann complexifier in homogeneous and isotropic FRW cosmology. The complexifier is the dilatation operator acting on the canonical phase space for gravity and generates the canonical transformations shifting the Barbero-Immirzi parameter. We focus on... |
2008.01154 | Neil Turok | Job Feldbrugge and Neil Turok | Gravitational lensing of binary systems in wave optics | 5 pages, 4 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first detailed computations of wave optics effects in the
gravitational lensing of binary systems. The field is conceptually rich,
combining the caustic singularities produced in classical gravitational lensing
with quantum (wave) interference effects. New techniques have enabled us to
overcome previou... | [
{
"created": "Mon, 3 Aug 2020 19:44:16 GMT",
"version": "v1"
}
] | 2020-08-06 | [
[
"Feldbrugge",
"Job",
""
],
[
"Turok",
"Neil",
""
]
] | We present the first detailed computations of wave optics effects in the gravitational lensing of binary systems. The field is conceptually rich, combining the caustic singularities produced in classical gravitational lensing with quantum (wave) interference effects. New techniques have enabled us to overcome previous ... |
1507.04212 | Shahram Jalalzadeh | T. Rostami, S. Jalalzadeh and P.V. Moniz | Quantum cosmological intertwining: Factor ordering and boundary
conditions from hidden symmetries | 13 pages, no figure, to appear in Phys. Rev. D | null | 10.1103/PhysRevD.92.023526 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the implications of hidden symmetries present in a particular
quantum cosmological setting, extending the results reported in \cite{10,11}.
In more detail, our case study is constituted by a spatially closed
Friedmann-Lema\^{\i}tre-Robertson-Walker universe, in the presence of a
conformally coupled scalar ... | [
{
"created": "Wed, 15 Jul 2015 13:35:28 GMT",
"version": "v1"
}
] | 2015-08-06 | [
[
"Rostami",
"T.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Moniz",
"P. V.",
""
]
] | We explore the implications of hidden symmetries present in a particular quantum cosmological setting, extending the results reported in \cite{10,11}. In more detail, our case study is constituted by a spatially closed Friedmann-Lema\^{\i}tre-Robertson-Walker universe, in the presence of a conformally coupled scalar fi... |
1709.03027 | Jose Ademir Sales Lima | A. P. Santos, R. Silva, J. S. Alcaniz, J. A. S. Lima | Nonextensive Kinetic Theory and H-Theorem in General Relativity | 12 pages, no figures. Accepted for publication in Annals of Physics | null | 10.1016/j.aop.2017.08.027 | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nonextensive kinetic theory for degenerate quantum gases is discussed in
the general relativistic framework. By incorporating nonadditive modifications
in the collisional term of the relativistic Boltzmann equation and entropy
current, it is shown that Tsallis entropic framework satisfies a H-theorem in
the prese... | [
{
"created": "Sun, 10 Sep 2017 02:27:47 GMT",
"version": "v1"
}
] | 2017-10-25 | [
[
"Santos",
"A. P.",
""
],
[
"Silva",
"R.",
""
],
[
"Alcaniz",
"J. S.",
""
],
[
"Lima",
"J. A. S.",
""
]
] | The nonextensive kinetic theory for degenerate quantum gases is discussed in the general relativistic framework. By incorporating nonadditive modifications in the collisional term of the relativistic Boltzmann equation and entropy current, it is shown that Tsallis entropic framework satisfies a H-theorem in the presenc... |
1302.4300 | Mehmet Kavuk Mr. | N. Katirci, Mehmet Kavuk | $f(R,{T_{\mu\nu} T^{\mu\nu}})$ gravity and Cardassian-like expansion as
one of its consequences | 13 pages, 1 figure, matches published version | Eur. Phys. J. Plus (2014) 129: 163 | 10.1140/epjp/i2014-14163-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new model of gravity where the Ricci scalar (R) in
Einstein-Hilbert action is replaced by an arbitrary function of R and of the
norm of energy-momentum tensor i.e., $f(R,T_{\mu\nu}T^{\mu\nu})$. Field
equations are derived in the metric formalism. We find that the equation of
motion of massive test partic... | [
{
"created": "Mon, 18 Feb 2013 15:03:26 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Feb 2014 17:03:27 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Aug 2014 04:16:23 GMT",
"version": "v3"
}
] | 2014-08-04 | [
[
"Katirci",
"N.",
""
],
[
"Kavuk",
"Mehmet",
""
]
] | We propose a new model of gravity where the Ricci scalar (R) in Einstein-Hilbert action is replaced by an arbitrary function of R and of the norm of energy-momentum tensor i.e., $f(R,T_{\mu\nu}T^{\mu\nu})$. Field equations are derived in the metric formalism. We find that the equation of motion of massive test particle... |
1112.2714 | Delsate T\'erence | T\'erence Delsate and Nobuyuki Sawado | Localizing modes of massive fermions and a U(1) gauge field in the
inflating baby-skyrmion branes | 20 pages, 13 figures, to appear in PRD. Typo corrected, matches
published version | null | 10.1103/PhysRevD.85.065025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the six dimensional brane world model, where the brane is
described by a localized solution to the baby-Skyrme model extending in the
extradimensions. The branes have a cosmological constant modeled by inflating
four dimensional slices and we further consider a bulk cosmological constant.
We focus on the ... | [
{
"created": "Mon, 12 Dec 2011 21:01:42 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Feb 2012 17:16:19 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Apr 2012 09:05:44 GMT",
"version": "v3"
}
] | 2015-06-03 | [
[
"Delsate",
"Térence",
""
],
[
"Sawado",
"Nobuyuki",
""
]
] | We consider the six dimensional brane world model, where the brane is described by a localized solution to the baby-Skyrme model extending in the extradimensions. The branes have a cosmological constant modeled by inflating four dimensional slices and we further consider a bulk cosmological constant. We focus on the to... |
gr-qc/0307022 | Benjamin C. Harms | Roberto Casadio, Sergio Fabi, Benjamin Harms | Electromagnetic waves around dilatonic stars and naked singularities | 9 pages, 1 figure | Phys.Rev. D70 (2004) 044026 | 10.1103/PhysRevD.70.044026 | null | gr-qc astro-ph hep-th | null | We study the propagation of classical electromagnetic waves on the simplest
four-dimensional spherically symmetric metric with a dilaton background field.
Solutions to the relevant equations are obtained perturbatively in a parameter
which measures the strength of the dilaton field (hence parameterizes the
departure ... | [
{
"created": "Mon, 7 Jul 2003 19:02:13 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Casadio",
"Roberto",
""
],
[
"Fabi",
"Sergio",
""
],
[
"Harms",
"Benjamin",
""
]
] | We study the propagation of classical electromagnetic waves on the simplest four-dimensional spherically symmetric metric with a dilaton background field. Solutions to the relevant equations are obtained perturbatively in a parameter which measures the strength of the dilaton field (hence parameterizes the departure fr... |
2210.00287 | Laszlo Arpad Gergely | Cec\'ilia Nagy, Zolt\'an Keresztes, L\'aszl\'o \'A. Gergely | Spherically symmetric, static black holes with scalar hair, and naked
singularities in nonminimally coupled k-essence | 20 pages, 4 figures | Phys. Rev. D 103, 124056 (2021) | 10.1103/PhysRevD.103.124056 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We apply a recently developed 2+1+1 decomposition of spacetime, based on a
nonorthogonal double foliation for the study of spherically symmetric, static
black hole solutions of Horndeski scalar-tensor theory. Our discussion proceeds
in an effective field theory (EFT) of modified gravity approach, with the
action depe... | [
{
"created": "Sat, 1 Oct 2022 14:22:39 GMT",
"version": "v1"
}
] | 2022-10-04 | [
[
"Nagy",
"Cecília",
""
],
[
"Keresztes",
"Zoltán",
""
],
[
"Gergely",
"László Á.",
""
]
] | We apply a recently developed 2+1+1 decomposition of spacetime, based on a nonorthogonal double foliation for the study of spherically symmetric, static black hole solutions of Horndeski scalar-tensor theory. Our discussion proceeds in an effective field theory (EFT) of modified gravity approach, with the action depend... |
gr-qc/0101119 | Brien C. Nolan | Brien C. Nolan | A note on behaviour at an isotropic singularity | 13 pp. plain latex. To appear in Classical and Quantum Gravity | Class.Quant.Grav. 18 (2001) 1127-1136 | 10.1088/0264-9381/18/6/311 | null | gr-qc | null | The behaviour of Jacobi fields along a time-like geodesic running into an
isotropic singularity is studied. It is shown that the Jacobi fields are
crushed to zero length at a rate which is the same in every direction
orthogonal to the geodesic. We show by means of a counter-example that this
crushing effect depends c... | [
{
"created": "Tue, 30 Jan 2001 15:47:54 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Nolan",
"Brien C.",
""
]
] | The behaviour of Jacobi fields along a time-like geodesic running into an isotropic singularity is studied. It is shown that the Jacobi fields are crushed to zero length at a rate which is the same in every direction orthogonal to the geodesic. We show by means of a counter-example that this crushing effect depends cru... |
gr-qc/9411055 | Karen Brewster | Abhay Ashtekar | Recent Mathematical Developments in Quantum General Relativity | 14 pages, TEX, no figures, Preprint CGPG-94/9-4 | null | null | null | gr-qc hep-th | null | After a brief chronological sketch of developments in non-perturbative
canonical quantum gravity, some of the recent mathematical results are
reviewed. These include: i) an explicit construction of the quantum counterpart
of Wheeler's superspace; ii) a rigorous procedure leading to the general
solution of the diffeom... | [
{
"created": "Mon, 21 Nov 1994 21:47:42 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Nov 1994 19:14:27 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Ashtekar",
"Abhay",
""
]
] | After a brief chronological sketch of developments in non-perturbative canonical quantum gravity, some of the recent mathematical results are reviewed. These include: i) an explicit construction of the quantum counterpart of Wheeler's superspace; ii) a rigorous procedure leading to the general solution of the diffeomor... |
2102.07578 | Vasilios Zarikas | Fotios K. Anagnostopoulos, Georgios Kofinas, Vasilios Zarikas | IR quantum gravity solves naturally cosmic acceleration and its
coincidence problem | 7 pages | Int.J.Mod.Phys.D 28 (2019) 14, 1944013 | 10.1142/S0218271819440139 | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | The novel idea is that the undergoing accelerated expansion of the universe
happens due to infrared quantum gravity modifications at intermediate
astrophysical scales of galaxies or galaxy clusters, within the framework of
Asymptotically Safe gravity. The reason is that structures of matter are
associated with a scal... | [
{
"created": "Mon, 15 Feb 2021 14:37:19 GMT",
"version": "v1"
}
] | 2021-02-16 | [
[
"Anagnostopoulos",
"Fotios K.",
""
],
[
"Kofinas",
"Georgios",
""
],
[
"Zarikas",
"Vasilios",
""
]
] | The novel idea is that the undergoing accelerated expansion of the universe happens due to infrared quantum gravity modifications at intermediate astrophysical scales of galaxies or galaxy clusters, within the framework of Asymptotically Safe gravity. The reason is that structures of matter are associated with a scale-... |
1711.07486 | Christian Friedrich Steinwachs | Michael S. Ruf and Christian F. Steinwachs | Quantum equivalence of $f(R)$ gravity and scalar-tensor theories | 7 pages, 1 figure; references added, accepted for publication in
Phys. Rev. D | Phys. Rev. D 97, 044050 (2018) | 10.1103/PhysRevD.97.044050 | FR-PHENO-2017-021 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate whether the classical equivalence of $f(R)$ gravity and its
formulation as scalar-tensor theory still holds at the quantum level. We
explicitly compare the corresponding one-loop divergences and find that the
equivalence is broken by off-shell quantum corrections, but recovered on-shell.
| [
{
"created": "Mon, 20 Nov 2017 19:00:01 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jan 2018 16:58:57 GMT",
"version": "v2"
}
] | 2018-03-07 | [
[
"Ruf",
"Michael S.",
""
],
[
"Steinwachs",
"Christian F.",
""
]
] | We investigate whether the classical equivalence of $f(R)$ gravity and its formulation as scalar-tensor theory still holds at the quantum level. We explicitly compare the corresponding one-loop divergences and find that the equivalence is broken by off-shell quantum corrections, but recovered on-shell. |
gr-qc/0306052 | Eric Poisson | Eric Poisson | The motion of point particles in curved spacetime | LaTeX2e, 116 pages, 10 figures. This is the final version, as it will
appear in Living Reviews in Relativity | LivingRev.Rel.7:6,2004 | 10.12942/lrr-2004-6 | null | gr-qc | null | This review is concerned with the motion of a point scalar charge, a point
electric charge, and a point mass in a specified background spacetime. In each
of the three cases the particle produces a field that behaves as outgoing
radiation in the wave zone, and therefore removes energy from the particle. In
the near zo... | [
{
"created": "Thu, 12 Jun 2003 15:51:54 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jul 2003 22:11:42 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Apr 2004 17:13:12 GMT",
"version": "v3"
}
] | 2016-10-19 | [
[
"Poisson",
"Eric",
""
]
] | This review is concerned with the motion of a point scalar charge, a point electric charge, and a point mass in a specified background spacetime. In each of the three cases the particle produces a field that behaves as outgoing radiation in the wave zone, and therefore removes energy from the particle. In the near zone... |
0710.0628 | Woei Chet Lim | Woei Chet Lim | New explicit spike solution -- non-local component of the generalized
Mixmaster attractor | Significantly revised. Colour figures simplified to accommodate
non-colour printing | Class.Quant.Grav.25:045014,2008 | 10.1088/0264-9381/25/4/045014 | null | gr-qc | null | By applying a standard solution-generating transformation to an arbitrary
vacuum Bianchi type II solution, one generates a new solution with spikes
commonly observed in numerical simulations. It is conjectured that the spike
solution is part of the generalized Mixmaster attractor.
| [
{
"created": "Tue, 2 Oct 2007 20:06:49 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Feb 2008 01:22:37 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Lim",
"Woei Chet",
""
]
] | By applying a standard solution-generating transformation to an arbitrary vacuum Bianchi type II solution, one generates a new solution with spikes commonly observed in numerical simulations. It is conjectured that the spike solution is part of the generalized Mixmaster attractor. |
gr-qc/9904068 | null | John Ellis, N.E. Mavromatos and D.V. Nanopoulos | Quantum-Gravitational Diffusion and Stochastic Fluctuations in the
Velocity of Light | 17 pages LATEX, uses axodraw style file | Gen.Rel.Grav.32:127-144,2000 | 10.1023/A:1001852601248 | ACT-3/99, CTP-TAMU-18/99 and OUTP--99--05P | gr-qc astro-ph hep-ph hep-th | null | We argue that quantum-gravitational fluctuations in the space-time background
give the vacuum non-trivial optical properties that include diffusion and
consequent uncertainties in the arrival times of photons, causing stochastic
fluctuations in the velocity of light ``in vacuo''. Our proposal is motivated
within a Li... | [
{
"created": "Mon, 26 Apr 1999 22:17:02 GMT",
"version": "v1"
}
] | 2009-09-11 | [
[
"Ellis",
"John",
""
],
[
"Mavromatos",
"N. E.",
""
],
[
"Nanopoulos",
"D. V.",
""
]
] | We argue that quantum-gravitational fluctuations in the space-time background give the vacuum non-trivial optical properties that include diffusion and consequent uncertainties in the arrival times of photons, causing stochastic fluctuations in the velocity of light ``in vacuo''. Our proposal is motivated within a Liou... |
2401.03669 | Weilong Luo | Weilong Luo, Chang Liu, Zong-Kuan Guo | Constraints on Einstein-dilaton Gauss-Bonnet gravity with Taiji | 14 pages, 2 figures. version accepted by EPJC | Eur. Phys. J. C 84, 394 (2024) | 10.1140/epjc/s10052-024-12735-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the 2030s, space-based gravitational-wave (GW) detectors will exhibit
unprecedented sensitivity in the millihertz frequency band, greatly expanding
the potential for testing theories of gravity compared to ground-based GW
detectors. Inspired by effective string theory, Einstein-dilaton Gauss-Bonnet
(EdGB) gravity ... | [
{
"created": "Mon, 8 Jan 2024 05:24:20 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Apr 2024 01:41:37 GMT",
"version": "v2"
}
] | 2024-04-16 | [
[
"Luo",
"Weilong",
""
],
[
"Liu",
"Chang",
""
],
[
"Guo",
"Zong-Kuan",
""
]
] | In the 2030s, space-based gravitational-wave (GW) detectors will exhibit unprecedented sensitivity in the millihertz frequency band, greatly expanding the potential for testing theories of gravity compared to ground-based GW detectors. Inspired by effective string theory, Einstein-dilaton Gauss-Bonnet (EdGB) gravity in... |
2101.05745 | Tapobrata Sarkar | Sandip Chowdhury, Kunal Pal, Kuntal Pal, Tapobrata Sarkar | Disformal transformations and the motion of a particle in semi-classical
gravity | 18 Pages, LaTeX | null | 10.1140/epjc/s10052-021-09751-z | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The approach to incorporate quantum effects in gravity by replacing free
particle geodesics with Bohmian non-geodesic trajectories has an equivalent
description in terms of a conformally related geometry, where the motion is
force free, with the quantum effects inside the conformal factor, i.e., in the
geometry itsel... | [
{
"created": "Thu, 14 Jan 2021 17:47:28 GMT",
"version": "v1"
}
] | 2021-11-10 | [
[
"Chowdhury",
"Sandip",
""
],
[
"Pal",
"Kunal",
""
],
[
"Pal",
"Kuntal",
""
],
[
"Sarkar",
"Tapobrata",
""
]
] | The approach to incorporate quantum effects in gravity by replacing free particle geodesics with Bohmian non-geodesic trajectories has an equivalent description in terms of a conformally related geometry, where the motion is force free, with the quantum effects inside the conformal factor, i.e., in the geometry itself.... |
2310.03520 | Yi-Ming Hu | Chang-Qing Ye, Hui-Min Fan, Alejandro Torres-Orjuela, Jian-dong Zhang,
Yi-Ming Hu | Identification of Gravitational-waves from Extreme Mass Ratio Inspirals | 15 pages, 6 figures, comments welcom | null | null | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Space-based gravitational wave detectors like TianQin or LISA could observe
extreme-mass-ratio-inspirals (EMRIs) at millihertz frequencies. The accurate
identification of these EMRI signals from the data plays a crucial role in
enabling in-depth study of astronomy and physics. We aim at the identification
stage of th... | [
{
"created": "Thu, 5 Oct 2023 13:09:28 GMT",
"version": "v1"
}
] | 2023-10-06 | [
[
"Ye",
"Chang-Qing",
""
],
[
"Fan",
"Hui-Min",
""
],
[
"Torres-Orjuela",
"Alejandro",
""
],
[
"Zhang",
"Jian-dong",
""
],
[
"Hu",
"Yi-Ming",
""
]
] | Space-based gravitational wave detectors like TianQin or LISA could observe extreme-mass-ratio-inspirals (EMRIs) at millihertz frequencies. The accurate identification of these EMRI signals from the data plays a crucial role in enabling in-depth study of astronomy and physics. We aim at the identification stage of the ... |
2005.05573 | Rajesh Kumar | Rajesh Kumar and S. K. Srivastava | Dynamical model of expansion free dissipative perfect fluids in general
relativity | Require comments | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper deals with the spherically symmetric self-gravitating star which
is considered to be expansion free dissipative perfect fluids distribution.
Some recent research reveals that expansion free dynamical star must be
accelerating and dissipating. We adopted some conjectures to obtain the
analytical solution fo... | [
{
"created": "Tue, 12 May 2020 06:49:38 GMT",
"version": "v1"
}
] | 2020-05-13 | [
[
"Kumar",
"Rajesh",
""
],
[
"Srivastava",
"S. K.",
""
]
] | This paper deals with the spherically symmetric self-gravitating star which is considered to be expansion free dissipative perfect fluids distribution. Some recent research reveals that expansion free dynamical star must be accelerating and dissipating. We adopted some conjectures to obtain the analytical solution for ... |
gr-qc/0310045 | Luciano Rezzolla | Luciano Rezzolla, Olindo Zanotti, Jose A. Font | Dynamics of thick discs around Schwarzschild-de Sitter black holes | 12 pages; A&A, in press | Astron.Astrophys. 412 (2003) 603 | 10.1051/0004-6361:20031457 | null | gr-qc astro-ph | null | We consider the effects of a cosmological constant on the dynamics of
constant angular momentum discs orbiting Schwarzschild-de Sitter black holes.
The motivation behind this study is to investigate whether the presence of a
radial force contrasting the black hole's gravitational attraction can
influence the occurren... | [
{
"created": "Tue, 7 Oct 2003 17:14:55 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Rezzolla",
"Luciano",
""
],
[
"Zanotti",
"Olindo",
""
],
[
"Font",
"Jose A.",
""
]
] | We consider the effects of a cosmological constant on the dynamics of constant angular momentum discs orbiting Schwarzschild-de Sitter black holes. The motivation behind this study is to investigate whether the presence of a radial force contrasting the black hole's gravitational attraction can influence the occurrence... |
gr-qc/0006005 | Steven L. Liebling | Steven L. Liebling | Black Hole Critical Phenomena Without Black Holes | 13 pages, 6 figures; Submission for the proceedings of ICGC 2000 in
the journal Premana | Pramana 55:497-509,2000 | 10.1007/s12043-000-0162-6 | null | gr-qc | null | Studying the threshold of black hole formation via numerical evolution has
led to the discovery of fascinating nonlinear phenomena. Power-law mass
scaling, aspects of universality, and self-similarity have now been found for a
large variety of models. However, questions remain. Here I briefly review
critical phenomen... | [
{
"created": "Fri, 2 Jun 2000 17:44:44 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Liebling",
"Steven L.",
""
]
] | Studying the threshold of black hole formation via numerical evolution has led to the discovery of fascinating nonlinear phenomena. Power-law mass scaling, aspects of universality, and self-similarity have now been found for a large variety of models. However, questions remain. Here I briefly review critical phenomena,... |
1806.04766 | Lei Feng | Lei Feng (Purple Mountain Observatory) | The Energy Dependence of Micro Black Hole Horizon in Quantum Gravity
Theory | 4 pages, 1 figure, published in Eur.Phys.J.Plus | Eur.Phys.J.Plus 134 (2019) no.8, 388 | 10.1140/epjp/i2019-12781-0 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy dependence of the deflection angle is a common prediction in some
quantum gravity theories when the impact parameters are much larger than the
photon wavelength. For low energy photons, the deflection angle recovers to the
prediction of GR. But it reduces to zero for infinite energy photons. In this
paper,... | [
{
"created": "Sun, 10 Jun 2018 16:14:05 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Dec 2018 06:10:55 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Oct 2019 02:46:03 GMT",
"version": "v3"
}
] | 2019-10-11 | [
[
"Feng",
"Lei",
"",
"Purple Mountain Observatory"
]
] | The energy dependence of the deflection angle is a common prediction in some quantum gravity theories when the impact parameters are much larger than the photon wavelength. For low energy photons, the deflection angle recovers to the prediction of GR. But it reduces to zero for infinite energy photons. In this paper, w... |
gr-qc/9904060 | S. K. Moayedi | M. A. Jafarizadeh, H. Fakhri, S. K. Moayedi | 2+1-Gravity and The Embedding its Dynamiycal Symmetry and
Para-Supersymmetry into SO(4,c) Group | 16 page, Latex, no figures | null | null | null | gr-qc | null | Some special solutions of the Einstein-Maxwell action with a non-negative
cosmological constant and a very heavy point mass particle have been obtained.
The solutions correspond to static spacetime of locally constant curvature in
its spatial part and a constant magnetic field of a magnetic monopole together
with def... | [
{
"created": "Sat, 24 Apr 1999 18:34:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jafarizadeh",
"M. A.",
""
],
[
"Fakhri",
"H.",
""
],
[
"Moayedi",
"S. K.",
""
]
] | Some special solutions of the Einstein-Maxwell action with a non-negative cosmological constant and a very heavy point mass particle have been obtained. The solutions correspond to static spacetime of locally constant curvature in its spatial part and a constant magnetic field of a magnetic monopole together with defic... |
gr-qc/0310109 | Bryan Kelleher | Bryan Kelleher | Scale-invariance in gravity and implications for the cosmological
constant | Replaced with final version: minor changes to text; references added | Class. Quantum Grav. 21 (2004) 2623-39 | 10.1088/0264-9381/21/11/008 | null | gr-qc | null | Recently a scale invariant theory of gravity was constructed by imposing a
conformal symmetry on general relativity. The imposition of this symmetry
changed the configuration space from superspace - the space of all Riemannian
3-metrics modulo diffeomorphisms - to conformal superspace - the space of all
Riemannian 3-... | [
{
"created": "Fri, 24 Oct 2003 21:23:15 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Oct 2003 13:38:52 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Apr 2004 23:40:54 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Kelleher",
"Bryan",
""
]
] | Recently a scale invariant theory of gravity was constructed by imposing a conformal symmetry on general relativity. The imposition of this symmetry changed the configuration space from superspace - the space of all Riemannian 3-metrics modulo diffeomorphisms - to conformal superspace - the space of all Riemannian 3-me... |
2011.03547 | William East | William E. East and Justin L. Ripley | Evolution of Einstein-scalar-Gauss-Bonnet gravity using a modified
harmonic formulation | 23 pages, 13 figures; revised to match PRD version | Phys. Rev. D 103, 044040 (2021) | 10.1103/PhysRevD.103.044040 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present numerical solutions of several spacetimes of physical interest,
including binary black hole mergers, in shift-symmetric
Einstein-scalar-Gauss-Bonnet (ESGB) gravity, and describe our methods for
solving the full equations of motion, without approximation, for general
spacetimes. While we concentrate on the ... | [
{
"created": "Fri, 6 Nov 2020 19:00:00 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Feb 2021 20:52:47 GMT",
"version": "v2"
}
] | 2021-02-25 | [
[
"East",
"William E.",
""
],
[
"Ripley",
"Justin L.",
""
]
] | We present numerical solutions of several spacetimes of physical interest, including binary black hole mergers, in shift-symmetric Einstein-scalar-Gauss-Bonnet (ESGB) gravity, and describe our methods for solving the full equations of motion, without approximation, for general spacetimes. While we concentrate on the sp... |
1902.03621 | Charles Schwartz | Charles Schwartz | An Approach for Modelling Tachyons with Gravitation | 20 pages; major revision starting with Section 5 | null | 10.1142/S0217751X19501033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work expands previous efforts, within the classical theories of Special
and General Relativity, to include tachyons (faster-than-light particles) along
with ordinary (slower-than-light) particles at any energy. The objective here
is to construct a Hamiltonian that includes both the particles and the
gravitationa... | [
{
"created": "Sun, 10 Feb 2019 15:25:29 GMT",
"version": "v1"
},
{
"created": "Mon, 20 May 2019 22:39:59 GMT",
"version": "v2"
},
{
"created": "Sat, 15 Jun 2019 13:24:14 GMT",
"version": "v3"
}
] | 2019-07-24 | [
[
"Schwartz",
"Charles",
""
]
] | This work expands previous efforts, within the classical theories of Special and General Relativity, to include tachyons (faster-than-light particles) along with ordinary (slower-than-light) particles at any energy. The objective here is to construct a Hamiltonian that includes both the particles and the gravitational ... |
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