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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9806098 | Scott Foster | S. Foster | Scalar Field Cosmologies and the Initial Space-Time Singularity | 31 pages, 3 figures | Class.Quant.Grav. 15 (1998) 3485-3504 | 10.1088/0264-9381/15/11/014 | ADP-98-26/M66 | gr-qc | null | The singularity structure of cosmological models whose matter content
consists of a scalar field with arbitrary non-negative potential is discussed.
The special case of spatially flat FRW space-time is analysed in detail using a
dynamical systems approach which may readily be generalised to more complicated
space-tim... | [
{
"created": "Thu, 25 Jun 1998 10:41:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Foster",
"S.",
""
]
] | The singularity structure of cosmological models whose matter content consists of a scalar field with arbitrary non-negative potential is discussed. The special case of spatially flat FRW space-time is analysed in detail using a dynamical systems approach which may readily be generalised to more complicated space-times... |
2101.04153 | Anton Kapustin | Anton Kapustin, Marc Touraev | Non-relativistic Geometry and the Equivalence Principle | 11 pages. v2: version published in Classical and Quantum Gravity | Classical and Quantum Gravity 38, 135003 (2021) | 10.1088/1361-6382/abfea5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a geometric and symmetry-based formulation of the equivalence
principle in non-relativistic physics. It applies both on the classical and
quantum levels and states that the Newtonian potential can be eliminated in
favor of a curved and time-dependent spatial metric. It is this requirement
that forces the ... | [
{
"created": "Mon, 11 Jan 2021 19:30:08 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Jul 2021 23:51:49 GMT",
"version": "v2"
}
] | 2021-07-13 | [
[
"Kapustin",
"Anton",
""
],
[
"Touraev",
"Marc",
""
]
] | We describe a geometric and symmetry-based formulation of the equivalence principle in non-relativistic physics. It applies both on the classical and quantum levels and states that the Newtonian potential can be eliminated in favor of a curved and time-dependent spatial metric. It is this requirement that forces the gr... |
2406.16545 | Andrei Galiautdinov | Andrei Galiautdinov | Canonical quantization of the dark Dirac field and time asymmetry | 8 pages, no figures; typos corrected, supersymmetric extension
proposed | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform canonical quantization of the single-component, spin-zero field
that was introduced by Dirac in 1971 and recently suggested as a candidate for
dark matter by Bogomolny. The massive and massless cases are treated
separately. Since in the massive case only positive-frequency modes are
normalizable and regard... | [
{
"created": "Mon, 24 Jun 2024 11:29:57 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jul 2024 13:47:11 GMT",
"version": "v2"
}
] | 2024-07-02 | [
[
"Galiautdinov",
"Andrei",
""
]
] | We perform canonical quantization of the single-component, spin-zero field that was introduced by Dirac in 1971 and recently suggested as a candidate for dark matter by Bogomolny. The massive and massless cases are treated separately. Since in the massive case only positive-frequency modes are normalizable and regarded... |
gr-qc/9908018 | Sameer Gupta | Sameer Gupta | Causality in Spin Foam Models | 19 pages, LaTeX2e, many eps figures | Phys.Rev. D61 (2000) 064014 | 10.1103/PhysRevD.61.064014 | null | gr-qc | null | We compute Teitelboim's causal propagator in the context of canonical loop
quantum gravity. For the Lorentzian signature, we find that the resultant power
series can be expressed as a sum over branched, colored two-surfaces with an
intrinsic causal structure. This leads us to define a general structure which
we call ... | [
{
"created": "Thu, 5 Aug 1999 22:12:44 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Gupta",
"Sameer",
""
]
] | We compute Teitelboim's causal propagator in the context of canonical loop quantum gravity. For the Lorentzian signature, we find that the resultant power series can be expressed as a sum over branched, colored two-surfaces with an intrinsic causal structure. This leads us to define a general structure which we call a ... |
1004.0998 | Jacob Slutsky | J. Slutsky, L. Blackburn, D. A. Brown, L. Cadonati, J. Cain, M.
Cavagli\`a, S. Chatterji, N. Christensen, M. Coughlin, S. Desai, G.
Gonz\'alez, T. Isogai, E. Katsavounidis, B. Rankins, T. Reed, K. Riles, P.
Shawhan, J. R. Smith, N. Zotov, J. Zweizig | Methods for Reducing False Alarms in Searches for Compact Binary
Coalescences in LIGO Data | null | Class.Quant.Grav.27:165023,2010 | 10.1088/0264-9381/27/16/165023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LIGO detectors are sensitive to a variety of noise transients of
non-astrophysical origin. Instrumental glitches and environmental disturbances
increase the false alarm rate in the searches for gravitational waves. Using
times already identified when the interferometers produced data of questionable
quality, or w... | [
{
"created": "Wed, 7 Apr 2010 03:50:12 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Apr 2010 16:16:00 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Slutsky",
"J.",
""
],
[
"Blackburn",
"L.",
""
],
[
"Brown",
"D. A.",
""
],
[
"Cadonati",
"L.",
""
],
[
"Cain",
"J.",
""
],
[
"Cavaglià",
"M.",
""
],
[
"Chatterji",
"S.",
""
],
[
"Christensen",
... | The LIGO detectors are sensitive to a variety of noise transients of non-astrophysical origin. Instrumental glitches and environmental disturbances increase the false alarm rate in the searches for gravitational waves. Using times already identified when the interferometers produced data of questionable quality, or whe... |
1507.05047 | Hermano Velten | Jose Beltran Jimenez, Federico Piazza and Hermano Velten | Piercing the Vainshtein screen with anomalous gravitational wave speed:
Constraints on modified gravity from binary pulsars | v3: typos corrected. Final version to appear on PRL | Phys. Rev. Lett. 116, 061101 (2016) | 10.1103/PhysRevLett.116.061101 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using observations of the Hulse-Taylor pulsar we constrain the
gravitational wave (GW) speed to the level of $10^{-2}$. We apply this result
to scalar-tensor theories that generalize Galileon 4 and 5 models, which
display anomalous propagation speed and coupling to matter for GWs. We argue
that this effect survive... | [
{
"created": "Fri, 17 Jul 2015 19:26:45 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Sep 2015 08:42:10 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Jan 2016 13:19:44 GMT",
"version": "v3"
}
] | 2016-02-17 | [
[
"Jimenez",
"Jose Beltran",
""
],
[
"Piazza",
"Federico",
""
],
[
"Velten",
"Hermano",
""
]
] | By using observations of the Hulse-Taylor pulsar we constrain the gravitational wave (GW) speed to the level of $10^{-2}$. We apply this result to scalar-tensor theories that generalize Galileon 4 and 5 models, which display anomalous propagation speed and coupling to matter for GWs. We argue that this effect survives ... |
gr-qc/9408040 | Parthasarathi Mitra | A. Ghosh and P. Mitra | General form of thermodynamical entropy for black hole | LaTeX, 6 pages; published version | Mod.Phys.Lett.A11:1231-1234,1996 | 10.1142/S0217732396001247 | null | gr-qc hep-th | null | The entropy of a black hole can be different from a quarter of the area even
at the semiclassical level.
| [
{
"created": "Wed, 31 Aug 1994 10:57:00 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jun 1997 11:52:03 GMT",
"version": "v2"
}
] | 2010-11-01 | [
[
"Ghosh",
"A.",
""
],
[
"Mitra",
"P.",
""
]
] | The entropy of a black hole can be different from a quarter of the area even at the semiclassical level. |
2407.03077 | Eftychios Kaimakkamis | Eftychios Kaimakkamis and Karunava Sil | A formalism for the ambiguities of the Wheeler-DeWitt equation | Based on presentation at Corfu Summer Institute 2023 "School and
Workshops on Elementary Particle Physics and Gravity"(CORFU2023), 10
pages+references | null | 10.22323/1.463.0227 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study ambiguities in the precise formulation of the Wheeler-DeWitt
equation for the wavefunction of the Universe that arise due to different
operator orderings in the quantum Hamiltonian. We first examine the simpler
case of the 1-dimensional minisuperspace model and derive the inner product
measure that renders t... | [
{
"created": "Wed, 3 Jul 2024 12:52:22 GMT",
"version": "v1"
}
] | 2024-08-13 | [
[
"Kaimakkamis",
"Eftychios",
""
],
[
"Sil",
"Karunava",
""
]
] | We study ambiguities in the precise formulation of the Wheeler-DeWitt equation for the wavefunction of the Universe that arise due to different operator orderings in the quantum Hamiltonian. We first examine the simpler case of the 1-dimensional minisuperspace model and derive the inner product measure that renders the... |
1806.07295 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Dynamical Systems Perspective of Cosmological Finite-time Singularities
in $f(R)$ Gravity and Interacting Multifluid Cosmology | PRD Accepted | null | 10.1103/PhysRevD.98.024013 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we shall investigate the occurrence of future cosmological
finite-time singularities in the dynamical system corresponding to two
cosmological theories, namely that of vacuum $f(R)$ gravity and that of three
fluids. The vacuum $f(R)$ gravity is an example for which the variables we will
choose to quantif... | [
{
"created": "Tue, 19 Jun 2018 14:55:59 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this work we shall investigate the occurrence of future cosmological finite-time singularities in the dynamical system corresponding to two cosmological theories, namely that of vacuum $f(R)$ gravity and that of three fluids. The vacuum $f(R)$ gravity is an example for which the variables we will choose to quantify ... |
2002.03599 | German Sharov | G. S. Sharov and E. S. Sinyakov | Cosmological models, observational data and tension in Hubble constant | 15 pages, 6 figures, submitted to Mathematical Modelling and
Geometry, | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze how predictions of cosmological models depend on a choice of
described observational data, restrictions on flatness,
and how this choice can alleviate the $H_0$ tension. These effects are
demonstrated in the $w$CDM model in comparison with the standard $\Lambda$CDM
model. We describe the Pantheon sample ... | [
{
"created": "Mon, 10 Feb 2020 08:31:26 GMT",
"version": "v1"
}
] | 2020-02-11 | [
[
"Sharov",
"G. S.",
""
],
[
"Sinyakov",
"E. S.",
""
]
] | We analyze how predictions of cosmological models depend on a choice of described observational data, restrictions on flatness, and how this choice can alleviate the $H_0$ tension. These effects are demonstrated in the $w$CDM model in comparison with the standard $\Lambda$CDM model. We describe the Pantheon sample obse... |
1611.09720 | Oliver Porth | Oliver Porth, Hector Olivares, Yosuke Mizuno, Ziri Younsi, Luciano
Rezzolla, Monika Moscibrodzka, Heino Falcke and Michael Kramer | The Black Hole Accretion Code | revised version accepted for publication by Computational
Astrophysics and Cosmology. Some figures have been down-sampled | null | 10.1186/s40668-017-0020-2 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the black hole accretion code (BHAC), a new multidimensional
general-relativistic magnetohydrodynamics module for the MPI-AMRVAC framework.
BHAC has been designed to solve the equations of ideal general-relativistic
magnetohydrodynamics in arbitrary spacetimes and exploits adaptive mesh
refinement techniqu... | [
{
"created": "Tue, 29 Nov 2016 16:49:49 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Jun 2017 17:54:44 GMT",
"version": "v2"
}
] | 2017-06-20 | [
[
"Porth",
"Oliver",
""
],
[
"Olivares",
"Hector",
""
],
[
"Mizuno",
"Yosuke",
""
],
[
"Younsi",
"Ziri",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Moscibrodzka",
"Monika",
""
],
[
"Falcke",
"Heino",
""
],
[... | We present the black hole accretion code (BHAC), a new multidimensional general-relativistic magnetohydrodynamics module for the MPI-AMRVAC framework. BHAC has been designed to solve the equations of ideal general-relativistic magnetohydrodynamics in arbitrary spacetimes and exploits adaptive mesh refinement techniques... |
1712.05960 | Martin Bojowald | Martin Bojowald | Symmetries of space-time | 6 pages, based on an invited talk given at the Centennial Workshop on
General Relativity, Mexican GR Society, Guanajuato, Mexico, November 2015 | Int. J. Mod. Phys. D 25 (2016) 1644007 | 10.1142/S0218271816440077 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The equations of Hamiltonian gravity are often considered ugly cousins of the
elegant and manifestly covariant versions found in the Lagrangian theory.
However, both formulations are fundamental in their own rights because they
make different statements about the nature of space-time and its symmetries.
These implica... | [
{
"created": "Sat, 16 Dec 2017 13:45:16 GMT",
"version": "v1"
}
] | 2017-12-27 | [
[
"Bojowald",
"Martin",
""
]
] | The equations of Hamiltonian gravity are often considered ugly cousins of the elegant and manifestly covariant versions found in the Lagrangian theory. However, both formulations are fundamental in their own rights because they make different statements about the nature of space-time and its symmetries. These implicati... |
gr-qc/0406119 | Tekin Dereli | H. Cebeci, T. Dereli | Axi-Dilaton Gravity in D \geq 4 Dimensional Space-Times with Torsion | null | Phys.Rev.D71:024016,2005 | 10.1103/PhysRevD.71.024016 | null | gr-qc | null | We study models of axi-dilaton gravity in space-time geometries with torsion.
We discuss conformal re-scaling rules in both Riemannian and non-Riemannian
formulations. We give static, spherically symmetric solutions and examine their
singularity structure.
| [
{
"created": "Wed, 30 Jun 2004 08:52:54 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Cebeci",
"H.",
""
],
[
"Dereli",
"T.",
""
]
] | We study models of axi-dilaton gravity in space-time geometries with torsion. We discuss conformal re-scaling rules in both Riemannian and non-Riemannian formulations. We give static, spherically symmetric solutions and examine their singularity structure. |
1009.3267 | Piero Nicolini | Piero Nicolini and Benjamin Niedner | Hausdorff dimension of a particle path in a quantum manifold | 7 pages, 4 figure, updated version which matches that published on
Physical Review D | Phys.Rev.D83:024017,2011 | 10.1103/PhysRevD.83.024017 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After recalling the concept of the Hausdorff dimension, we study the fractal
properties of a quantum particle path. As a novelty we consider the possibility
for the space where the particle propagates to be endowed with a
quantum-gravity-induced minimal length. We show that the Hausdorff dimension
accounts for both t... | [
{
"created": "Thu, 16 Sep 2010 20:00:04 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jan 2011 15:24:49 GMT",
"version": "v2"
}
] | 2011-01-26 | [
[
"Nicolini",
"Piero",
""
],
[
"Niedner",
"Benjamin",
""
]
] | After recalling the concept of the Hausdorff dimension, we study the fractal properties of a quantum particle path. As a novelty we consider the possibility for the space where the particle propagates to be endowed with a quantum-gravity-induced minimal length. We show that the Hausdorff dimension accounts for both the... |
2110.06056 | Susmita Jana | Susmita Jana, S. Shankaranarayanan (IIT Bombay) | Non-minimally coupled electromagnetic fields and observable implications
for primordial black holes | 37 pages, 3 figures, accepted in Universe as part of the Special
Issue 'Open Questions in Black Hole Physics' | Universe 10(7), 270 (2024) | 10.3390/universe10070270 | null | gr-qc astro-ph.CO astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | General relativity (GR) postulates have been verified with high precision,
yet our understanding of how gravity interacts with matter fields remains
incomplete. Various modifications to GR have been proposed in both classical
and quantum realms to address these interactions within the strong gravity
regime. One such ... | [
{
"created": "Tue, 12 Oct 2021 14:58:37 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Jun 2024 22:15:43 GMT",
"version": "v2"
}
] | 2024-06-26 | [
[
"Jana",
"Susmita",
"",
"IIT Bombay"
],
[
"Shankaranarayanan",
"S.",
"",
"IIT Bombay"
]
] | General relativity (GR) postulates have been verified with high precision, yet our understanding of how gravity interacts with matter fields remains incomplete. Various modifications to GR have been proposed in both classical and quantum realms to address these interactions within the strong gravity regime. One such ap... |
1811.06528 | Edward Anderson | Edward Anderson | Shape Theories. II. Compactness Selection Principles | 21 pages, including 1 figure. Minor adjustments | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Shape(-and-scale) spaces - configuration spaces for generalized Kendall-type
Shape(-and-Scale) Theories - are usually not manifolds but stratified
manifolds. While in Kendall's own case - similarity shapes - the shape spaces
are analytically nice - Hausdorff - for the Image Analysis and Computer Vision
cases - affine... | [
{
"created": "Thu, 15 Nov 2018 18:52:03 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Dec 2018 23:54:23 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Jan 2019 15:56:20 GMT",
"version": "v3"
},
{
"created": "Tue, 12 Mar 2019 00:53:51 GMT",
"version": "v4"
}
] | 2019-03-13 | [
[
"Anderson",
"Edward",
""
]
] | Shape(-and-scale) spaces - configuration spaces for generalized Kendall-type Shape(-and-Scale) Theories - are usually not manifolds but stratified manifolds. While in Kendall's own case - similarity shapes - the shape spaces are analytically nice - Hausdorff - for the Image Analysis and Computer Vision cases - affine a... |
gr-qc/0612010 | Yu Zhang | Yu Zhang, Yuanxing Gui, Fei Yu and Fenglin Li | Quasinormal modes of a Schwarzschild black hole surrounded by free
static spherically symmetric quintessence: Electromagnetic perturbations | 6 pages, 3 figures | Gen.Rel.Grav.39:1003-1010,2007 | 10.1007/s10714-007-0434-2 | null | gr-qc | null | In this paper, we evaluated the quasinormal modes of electromagnetic
perturbation in a Schwarzschild black hole surrounded by the static spherically
symmetric quintessence by using the third-order WKB approximation when the
quintessential state parameter $ w_{q}$ in the range of $-1/3<w_{q}<0$. Due to
the presence of... | [
{
"created": "Fri, 1 Dec 2006 12:27:36 GMT",
"version": "v1"
},
{
"created": "Tue, 29 May 2007 11:44:07 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Zhang",
"Yu",
""
],
[
"Gui",
"Yuanxing",
""
],
[
"Yu",
"Fei",
""
],
[
"Li",
"Fenglin",
""
]
] | In this paper, we evaluated the quasinormal modes of electromagnetic perturbation in a Schwarzschild black hole surrounded by the static spherically symmetric quintessence by using the third-order WKB approximation when the quintessential state parameter $ w_{q}$ in the range of $-1/3<w_{q}<0$. Due to the presence of q... |
gr-qc/9712077 | Frank Wilczek | Maulik K. Parikh and Frank Wilczek | An Action for Black Hole Membranes | LaTeX, 30 Pages, minor editorial changes | Phys.Rev. D58 (1998) 064011 | 10.1103/PhysRevD.58.064011 | PUPT-1753 and IASSNS-HEP-97-117 | gr-qc hep-th | null | The membrane paradigm is the remarkable view that, to an external observer, a
black hole appears to behave exactly like a dynamical fluid membrane, obeying
such pre-relativistic equations as Ohm's law and the Navier-Stokes equation. It
has traditionally been derived by manipulating the equations of motion. Here we
pr... | [
{
"created": "Wed, 17 Dec 1997 22:15:25 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Mar 1998 20:54:20 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Parikh",
"Maulik K.",
""
],
[
"Wilczek",
"Frank",
""
]
] | The membrane paradigm is the remarkable view that, to an external observer, a black hole appears to behave exactly like a dynamical fluid membrane, obeying such pre-relativistic equations as Ohm's law and the Navier-Stokes equation. It has traditionally been derived by manipulating the equations of motion. Here we prov... |
0906.5078 | Bogus{\l}aw Broda | Bogus{\l}aw Broda, Micha{\l} Szanecki | Vacuum pressure, dark energy and dark matter | 6 pages, 0 figures | ISRN Astronomy and Astrophysics, Volume 2011, Article ID 509836 | 10.5402/2011/509836 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been argued that the correct, i.e. positive, sign of quantum vacuum
energy density, or more properly, negative sign of quantum vacuum pressure,
requires not a very large number, e.g. ~100, of additional, undiscovered
fundamental bosonic particle species, absent in the standard model.
Interpretation of the new ... | [
{
"created": "Sat, 27 Jun 2009 13:22:37 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Jun 2009 13:43:20 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Aug 2009 13:46:17 GMT",
"version": "v3"
},
{
"created": "Thu, 5 Jan 2012 16:36:11 GMT",
"version": "v4"
}
] | 2012-01-06 | [
[
"Broda",
"Bogusław",
""
],
[
"Szanecki",
"Michał",
""
]
] | It has been argued that the correct, i.e. positive, sign of quantum vacuum energy density, or more properly, negative sign of quantum vacuum pressure, requires not a very large number, e.g. ~100, of additional, undiscovered fundamental bosonic particle species, absent in the standard model. Interpretation of the new pa... |
0807.3824 | Sergey Vyatchanin | Andrey A. Rakhubovsky and Sergey P. Vyatchanin | Displacement-noise-free gravitational-wave detection with two
Fabry-Perot cavities | 10 pages, 5 figures | Phys.Lett.A373:13-18,2008 | 10.1016/j.physleta.2008.10.088 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose two detuned Fabry-Perot cavities, each pumped through both the
mirrors, positioned in line as a toy model of the gravitational-wave (GW)
detector free from displacement noise of the test masses. It is demonstrated
that the noise of cavity mirrors can be completely excluded in a proper linear
combination of... | [
{
"created": "Thu, 24 Jul 2008 09:16:44 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Rakhubovsky",
"Andrey A.",
""
],
[
"Vyatchanin",
"Sergey P.",
""
]
] | We propose two detuned Fabry-Perot cavities, each pumped through both the mirrors, positioned in line as a toy model of the gravitational-wave (GW) detector free from displacement noise of the test masses. It is demonstrated that the noise of cavity mirrors can be completely excluded in a proper linear combination of t... |
gr-qc/0401002 | Bahram Mashhoon | Bahram Mashhoon and Paul S. Wesson | Gauge-Dependent Cosmological "Constant" | 14 pages, no figures, expanded version to be published in Class.
Quantum Grav | Class.Quant.Grav. 21 (2004) 3611 | 10.1088/0264-9381/21/14/020 | null | gr-qc astro-ph | null | When the cosmological constant of spacetime is derived from the 5D
induced-matter theory of gravity, we show that a simple gauge transformation
changes it to a variable measure of the vacuum which is infinite at the big
bang and decays to an astrophysically-acceptable value at late epochs. We
outline implications of ... | [
{
"created": "Thu, 1 Jan 2004 00:29:14 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jun 2004 18:59:06 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Mashhoon",
"Bahram",
""
],
[
"Wesson",
"Paul S.",
""
]
] | When the cosmological constant of spacetime is derived from the 5D induced-matter theory of gravity, we show that a simple gauge transformation changes it to a variable measure of the vacuum which is infinite at the big bang and decays to an astrophysically-acceptable value at late epochs. We outline implications of th... |
2212.12175 | Antony Valentini | Antony Valentini | Beyond the Born rule in quantum gravity | 39 pages. For special issue of Foundations of Physics, 'Pilot-wave
and beyond: Louis de Broglie and David Bohm's quest for a quantum ontology',
ed. A. Drezet | Found. Phys. 53, 6 (2023) | 10.1007/s10701-022-00635-0 | null | gr-qc astro-ph.CO hep-th physics.hist-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have recently developed a new understanding of probability in quantum
gravity. In this paper we provide an overview of this new approach and its
implications. Adopting the de Broglie-Bohm pilot-wave formulation of quantum
physics, we argue that there is no Born rule at the fundamental level of
quantum gravity with... | [
{
"created": "Fri, 23 Dec 2022 07:15:35 GMT",
"version": "v1"
}
] | 2022-12-26 | [
[
"Valentini",
"Antony",
""
]
] | We have recently developed a new understanding of probability in quantum gravity. In this paper we provide an overview of this new approach and its implications. Adopting the de Broglie-Bohm pilot-wave formulation of quantum physics, we argue that there is no Born rule at the fundamental level of quantum gravity with a... |
1504.07622 | Norbert Klein | Norbert Klein | Analysis of recent G experiments by a differential version of MOND
theory | 16 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discrepancy between two recently reported experimental values of the
gravitational constant G was analysed within a differential version of MOND
theory. In contrast to the most commonly accepted interpretation of MOND
theory, it is assumed that only the relative gravitational acceleration between
a test mass and ... | [
{
"created": "Mon, 27 Apr 2015 20:45:43 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 2015 12:44:24 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Jul 2015 16:19:28 GMT",
"version": "v3"
},
{
"created": "Wed, 13 Apr 2016 12:44:00 GMT",
"version": "v4"
}
] | 2016-04-14 | [
[
"Klein",
"Norbert",
""
]
] | The discrepancy between two recently reported experimental values of the gravitational constant G was analysed within a differential version of MOND theory. In contrast to the most commonly accepted interpretation of MOND theory, it is assumed that only the relative gravitational acceleration between a test mass and an... |
1503.02873 | Jorge Ovalle | Roberto Casadio, Jorge Ovalle, Roldao da Rocha | The Minimal Geometric Deformation Approach Extended | Improved version with new solutions. 11 pages, 4 figures. To be
published in CQG | Class. Quantum Grav. 32 (2015) 215020 | 10.1088/0264-9381/32/21/215020 | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The minimal geometric deformation approach was introduced in order to study
the exterior space-time around spherically symmetric self-gravitating systems,
like stars or similar astrophysical objects as well, in the Randall-Sundrum
brane-world framework. A consistent extension of this approach is developed
here, which... | [
{
"created": "Tue, 10 Mar 2015 11:43:36 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Sep 2015 14:19:28 GMT",
"version": "v2"
}
] | 2015-10-15 | [
[
"Casadio",
"Roberto",
""
],
[
"Ovalle",
"Jorge",
""
],
[
"da Rocha",
"Roldao",
""
]
] | The minimal geometric deformation approach was introduced in order to study the exterior space-time around spherically symmetric self-gravitating systems, like stars or similar astrophysical objects as well, in the Randall-Sundrum brane-world framework. A consistent extension of this approach is developed here, which c... |
2201.06097 | Jaume Haro | Jaume de Haro, Emilio Elizalde | Some topics in Cosmology -- Clearly explained by means of simple
examples -- | 43 pages, 3 figures. New references and material has been added.
Version accepted for publication in Universe | null | null | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | This is a very comprehensible review of some key issues in Modern Cosmology.
Simple mathematical examples and analogies are always used, whenever available.
The starting point is the well know Big Bang Cosmology (BBC). We deal with the
mathematical singularities appearing in this theory and discuss some ways to
remov... | [
{
"created": "Sun, 16 Jan 2022 17:36:58 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jan 2022 16:29:30 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Mar 2022 10:22:11 GMT",
"version": "v3"
}
] | 2022-03-03 | [
[
"de Haro",
"Jaume",
""
],
[
"Elizalde",
"Emilio",
""
]
] | This is a very comprehensible review of some key issues in Modern Cosmology. Simple mathematical examples and analogies are always used, whenever available. The starting point is the well know Big Bang Cosmology (BBC). We deal with the mathematical singularities appearing in this theory and discuss some ways to remove ... |
1308.4770 | Sanjay Jhingan | Naresh Dadhich, Sushant G. Ghosh and Sanjay Jhingan | Bound orbits and gravitational theory | 7 pages, 1 pdf figure | Physical Review D 88, 124040 (2013) | 10.1103/PhysRevD.88.124040 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It can be easily shown that bound orbits around a static source can exist
only in 4 dimension and in none else for any long range force. This is so not
only for Maxwell's electromagnetic and Newton's gravity but also for Einstein's
gravitation theory. In contrast to Maxwell's electrodynamics and Newton's
gravity, GR ... | [
{
"created": "Thu, 22 Aug 2013 06:23:55 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Dadhich",
"Naresh",
""
],
[
"Ghosh",
"Sushant G.",
""
],
[
"Jhingan",
"Sanjay",
""
]
] | It can be easily shown that bound orbits around a static source can exist only in 4 dimension and in none else for any long range force. This is so not only for Maxwell's electromagnetic and Newton's gravity but also for Einstein's gravitation theory. In contrast to Maxwell's electrodynamics and Newton's gravity, GR ha... |
0706.2699 | Eyo Ita III | Eyo Eyo Ita III | Instanton representation of Plebanski gravity. Application to Bianchi
Type A metrics | 12 pages. Background material for revised journal article | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the instanton representation method we construct a general solution for
GR in the spatially homogeneous case restricted to diagonal variables. This
paper provides a testing ground and physical intuition for many of the salient
features of general relativity which it is suggested should be preserved in the
full ... | [
{
"created": "Tue, 19 Jun 2007 01:59:05 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jul 2007 04:53:57 GMT",
"version": "v2"
},
{
"created": "Mon, 26 May 2008 19:31:49 GMT",
"version": "v3"
},
{
"created": "Tue, 24 Jun 2008 19:26:47 GMT",
"version": "v4"
},
{
"cr... | 2011-03-21 | [
[
"Ita",
"Eyo Eyo",
"III"
]
] | Using the instanton representation method we construct a general solution for GR in the spatially homogeneous case restricted to diagonal variables. This paper provides a testing ground and physical intuition for many of the salient features of general relativity which it is suggested should be preserved in the full th... |
1911.09060 | Antonino Del Popolo | J. A. S. Lima (Departamento de Astronomia, Universidade de Sao Paulo),
A. Del Popolo (Catania University), A. R. Plastino (CeBio y Departamento de
Ciencias Basicas, Universidad Nacional del Noroeste de la Provincia de Buenos
Aires, UNNOBA) | Thermodynamic Equilibrium in General Relativity | 7 pages, 2 figures, PRD accepted | PRD 2009, volume 100, 104042;
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.104042 | 10.1103/PhysRevD.100.104042 | null | gr-qc astro-ph.GA cond-mat.stat-mech physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamic equilibrium condition for a static self-gravitating fluid
in the Einstein theory is defined by the Tolman-Ehrenfest temperature law,
$T{\sqrt {g_{00}(x^{i})}} = constant$, according to which the proper
temperature depends explicitly on the position within the medium through the
metric coefficient $g... | [
{
"created": "Wed, 20 Nov 2019 17:44:36 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Nov 2019 17:53:43 GMT",
"version": "v2"
}
] | 2020-09-02 | [
[
"Lima",
"J. A. S.",
"",
"Departamento de Astronomia, Universidade de Sao Paulo"
],
[
"Del Popolo",
"A.",
"",
"Catania University"
],
[
"Plastino",
"A. R.",
"",
"CeBio y Departamento de\n Ciencias Basicas, Universidad Nacional del Noroeste de la Provincia de... | The thermodynamic equilibrium condition for a static self-gravitating fluid in the Einstein theory is defined by the Tolman-Ehrenfest temperature law, $T{\sqrt {g_{00}(x^{i})}} = constant$, according to which the proper temperature depends explicitly on the position within the medium through the metric coefficient $g_{... |
2305.04040 | Peng-Cheng Li | Wei Xiong and Peng-Cheng Li | Quasinormal modes of rotating accelerating black holes | 23 pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper studies the quasinormal mode spectrum of the scalar perturbation
on the background of the rotating accelerating black holes. The quasinormal
frequency $\omega$ and the separation constant $\lambda$ are calculated using
two methods: the continued fractions method and the directly integration
method. The spe... | [
{
"created": "Sat, 6 May 2023 13:06:57 GMT",
"version": "v1"
}
] | 2023-05-09 | [
[
"Xiong",
"Wei",
""
],
[
"Li",
"Peng-Cheng",
""
]
] | This paper studies the quasinormal mode spectrum of the scalar perturbation on the background of the rotating accelerating black holes. The quasinormal frequency $\omega$ and the separation constant $\lambda$ are calculated using two methods: the continued fractions method and the directly integration method. The spect... |
1306.3865 | David Keitel | Yan Wang, David Keitel, Stanislav Babak, Antoine Petiteau, Markus
Otto, Simon Barke, Fumiko Kawazoe, Alexander Khalaidovski, Vitali M\"uller,
Daniel Sch\"utze, Holger Wittel, Karsten Danzmann, Bernard F. Schutz | Octahedron configuration for a displacement noise-cancelling
gravitational wave detector in space | 17 pages, 5 figures, revtex4-1, matches version accepted by PRD | Phys. Rev. D 88, 104021 (2013) | 10.1103/PhysRevD.88.104021 | LIGO-P1300074; AEI-2013-261 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study for the first time a three-dimensional octahedron constellation for
a space-based gravitational wave detector, which we call the Octahedral
Gravitational Observatory (OGO). With six spacecraft the constellation is able
to remove laser frequency noise and acceleration disturbances from the
gravitational wave ... | [
{
"created": "Mon, 17 Jun 2013 14:04:29 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Nov 2013 17:24:44 GMT",
"version": "v2"
}
] | 2013-11-21 | [
[
"Wang",
"Yan",
""
],
[
"Keitel",
"David",
""
],
[
"Babak",
"Stanislav",
""
],
[
"Petiteau",
"Antoine",
""
],
[
"Otto",
"Markus",
""
],
[
"Barke",
"Simon",
""
],
[
"Kawazoe",
"Fumiko",
""
],
[
"Khala... | We study for the first time a three-dimensional octahedron constellation for a space-based gravitational wave detector, which we call the Octahedral Gravitational Observatory (OGO). With six spacecraft the constellation is able to remove laser frequency noise and acceleration disturbances from the gravitational wave si... |
1501.04539 | Edward Malec | Patryk Mach and Edward Malec | General-relativistic rotation laws in rotating fluid bodies | 5 pages, to appear in the Physical Review D | Phys. Rev. D 91, 124053 (2015) | 10.1103/PhysRevD.91.124053 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We formulate new general-relativistic extensions of Newtonian rotation laws
for self-gravitating stationary fluids. They have been used to re-derive, in
the first post-Newtonian approximation, the well known geometric dragging of
frames. We derive two other general-relativistic weak-field effects within
rotating tori... | [
{
"created": "Mon, 19 Jan 2015 16:28:14 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jun 2015 20:05:26 GMT",
"version": "v2"
}
] | 2015-06-24 | [
[
"Mach",
"Patryk",
""
],
[
"Malec",
"Edward",
""
]
] | We formulate new general-relativistic extensions of Newtonian rotation laws for self-gravitating stationary fluids. They have been used to re-derive, in the first post-Newtonian approximation, the well known geometric dragging of frames. We derive two other general-relativistic weak-field effects within rotating tori: ... |
1610.03294 | Jedrzej \'Swie\.zewski | Pawe{\l} Duch, Jerzy Lewandowski, Jedrzej \'Swie\.zewski | Observer's observables. Residual diffeomorphisms | 23 pages | Class. Quantum Grav. 34 (2017) 125009 | 10.1088/1361-6382/aa6f33 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the fate of diffeomorphisms when the radial gauge is imposed
in canonical general relativity. As shown elsewhere, the radial gauge is
closely related to the observer's observables. These observables are invariant
under a large subgroup of diffeomorphisms which results in their usefulness for
canonical ... | [
{
"created": "Tue, 11 Oct 2016 12:09:02 GMT",
"version": "v1"
}
] | 2018-06-04 | [
[
"Duch",
"Paweł",
""
],
[
"Lewandowski",
"Jerzy",
""
],
[
"Świeżewski",
"Jedrzej",
""
]
] | We investigate the fate of diffeomorphisms when the radial gauge is imposed in canonical general relativity. As shown elsewhere, the radial gauge is closely related to the observer's observables. These observables are invariant under a large subgroup of diffeomorphisms which results in their usefulness for canonical ge... |
1602.04213 | Nurettin Pirinccioglu | Nurettin Pirinccioglu | Determinantal invariant gravity | 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein-Hilbert action with a determinantal invariant has been considered.
The obtained field equation contains the \texttt{inverse Ricci tensor},
$\Re_{\alpha\beta}$. The linearized solution of invariant has been examined,
and constant curvature space-time metric solution of the field equation gives
different curva... | [
{
"created": "Fri, 12 Feb 2016 12:52:17 GMT",
"version": "v1"
}
] | 2016-02-16 | [
[
"Pirinccioglu",
"Nurettin",
""
]
] | Einstein-Hilbert action with a determinantal invariant has been considered. The obtained field equation contains the \texttt{inverse Ricci tensor}, $\Re_{\alpha\beta}$. The linearized solution of invariant has been examined, and constant curvature space-time metric solution of the field equation gives different curvatu... |
gr-qc/0508078 | Pierre Noundjeu | P. Noundjeu | On the non-relativistic limit of the spherically symmetric
Einstein-Vlasov-Maxwell system | 16 pages | null | null | null | gr-qc | null | The Einstein-Vlasov-Maxwell (EVM) system can be viewed as a relativistic
generalization of the Vlasov-Poisson (VP) system. As it is proved below, one of
nice property obeys by the first system is that the strong energy condition
holds and this allows to conclude that the above system is physically viable.
We show in ... | [
{
"created": "Fri, 19 Aug 2005 10:09:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Noundjeu",
"P.",
""
]
] | The Einstein-Vlasov-Maxwell (EVM) system can be viewed as a relativistic generalization of the Vlasov-Poisson (VP) system. As it is proved below, one of nice property obeys by the first system is that the strong energy condition holds and this allows to conclude that the above system is physically viable. We show in th... |
2111.14612 | Alexander P. Sobolev | Alexander P. Sobolev | Foundations of a Theory of Gravity with a Constraint and its Canonical
Quantization | 34 pages, 11 figures, 2 tables | Foundations of Physics 52, 3 (2022) | 10.1007/s10701-021-00521-1 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The gravitational equations were derived in general relativity (GR) using the
assumption of their covariance relative to arbitrary transformations of
coordinates. It has been repeatedly expressed an opinion over the past century
that such equality of all coordinate systems may not correspond to reality.
Nevertheless,... | [
{
"created": "Thu, 25 Nov 2021 14:44:25 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Mar 2022 12:40:06 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Mar 2023 11:12:09 GMT",
"version": "v3"
},
{
"created": "Mon, 25 Sep 2023 16:20:07 GMT",
"version": "v4"
},
{
"c... | 2024-08-07 | [
[
"Sobolev",
"Alexander P.",
""
]
] | The gravitational equations were derived in general relativity (GR) using the assumption of their covariance relative to arbitrary transformations of coordinates. It has been repeatedly expressed an opinion over the past century that such equality of all coordinate systems may not correspond to reality. Nevertheless, n... |
2304.14222 | Claudio Aravena Cap | Claudio Aravena-Plaza, V\'ictor Mu\~noz and Felipe A. Asenjo | London-like tensor modes of gravitational waves in cosmic string
cosmology | null | null | 10.1134/S0202289323040035 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | From a classical analysis, we show that gravitational waves in a cosmological
medium with equation of state $\omega=-1/3$ can follow a London-like equation,
implying that some gravitational wave solutions present a decay for certain
wavelengths. This scenario, corresponding to a cosmic string cosmology, induces
an at... | [
{
"created": "Thu, 27 Apr 2023 14:33:07 GMT",
"version": "v1"
}
] | 2023-11-30 | [
[
"Aravena-Plaza",
"Claudio",
""
],
[
"Muñoz",
"Víctor",
""
],
[
"Asenjo",
"Felipe A.",
""
]
] | From a classical analysis, we show that gravitational waves in a cosmological medium with equation of state $\omega=-1/3$ can follow a London-like equation, implying that some gravitational wave solutions present a decay for certain wavelengths. This scenario, corresponding to a cosmic string cosmology, induces an atte... |
0908.4067 | Thomas L. Wilson | Thomas L. Wilson, Hans-Joachim Blome | The Pioneer Anomaly and a Rotating G\"odel Universe | 13 pages, 2 figures | Adv.Space Res.44:1345-1353,2009 | 10.1016/j.asr.2009.07.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based upon a simple cosmological model with no expansion, we find that the
rotational terms appearing in the G/"odel universe are too small to explain the
Pioneer anomaly. Although it contributes, universal rotation is not the cause
of the Pioneer effect.
| [
{
"created": "Thu, 27 Aug 2009 19:08:39 GMT",
"version": "v1"
}
] | 2009-11-18 | [
[
"Wilson",
"Thomas L.",
""
],
[
"Blome",
"Hans-Joachim",
""
]
] | Based upon a simple cosmological model with no expansion, we find that the rotational terms appearing in the G/"odel universe are too small to explain the Pioneer anomaly. Although it contributes, universal rotation is not the cause of the Pioneer effect. |
1607.06662 | Andreas G. A. Pithis | Andreas G. A. Pithis, Mairi Sakellariadou and Petar Tomov | Impact of nonlinear effective interactions on GFT quantum gravity
condensates | 22 pages, 18 figures; closest to published version | Phys. Rev. D 94, 064056 (2016) | 10.1103/PhysRevD.94.064056 | KCL-PH-TH/2016-43 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the numerical analysis of effectively interacting Group Field
Theory (GFT) models in the context of the GFT quantum gravity condensate
analogue of the Gross-Pitaevskii equation for real Bose-Einstein condensates
including combinatorially local interaction terms. Thus we go beyond the
usually considered con... | [
{
"created": "Thu, 21 Jul 2016 00:40:34 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Sep 2016 06:32:09 GMT",
"version": "v2"
}
] | 2016-09-28 | [
[
"Pithis",
"Andreas G. A.",
""
],
[
"Sakellariadou",
"Mairi",
""
],
[
"Tomov",
"Petar",
""
]
] | We present the numerical analysis of effectively interacting Group Field Theory (GFT) models in the context of the GFT quantum gravity condensate analogue of the Gross-Pitaevskii equation for real Bose-Einstein condensates including combinatorially local interaction terms. Thus we go beyond the usually considered const... |
gr-qc/0612145 | Karim Noui | Karim Noui | Three dimensional Loop Quantum Gravity: towards a self-gravitating
Quantum Field Theory | 36 pages, published in Class. Quant. Grav | Class.Quant.Grav.24:329-360,2007 | 10.1088/0264-9381/24/2/005 | null | gr-qc | null | In a companion paper, we have emphasized the role of the Drinfeld double
DSU(2) in the context of three dimensional Riemannian Loop Quantum Gravity
coupled to massive spinless point particles. We make use of this result to
propose a model for a self-gravitating quantum field theory (massive spinless
non-causal scalar... | [
{
"created": "Fri, 22 Dec 2006 13:40:33 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Noui",
"Karim",
""
]
] | In a companion paper, we have emphasized the role of the Drinfeld double DSU(2) in the context of three dimensional Riemannian Loop Quantum Gravity coupled to massive spinless point particles. We make use of this result to propose a model for a self-gravitating quantum field theory (massive spinless non-causal scalar f... |
1601.06134 | Giuseppe Alberti | Giuseppe Alberti, Marco Merafina | A General Criterion for the Dynamical Stability of Anisotropic Newtonian
Systems | 6 pages, 3 figures. Presence of a conceptual mistake [Eq.(20)] for
what concerns the deduction of the stability criterion. Consequently Eqs.(27)
and (28) are wrong | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of the dynamical stability of anistropic systems is studied, by
proposing a criterion in terms of the adiabatic local index $\gamma$. The
result has general validity and can be applied to several physical situations.
Configurations that cannot exist in the isotropic regime can exist in the
anisotropic one... | [
{
"created": "Fri, 22 Jan 2016 20:06:10 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Feb 2019 20:29:50 GMT",
"version": "v2"
}
] | 2019-02-14 | [
[
"Alberti",
"Giuseppe",
""
],
[
"Merafina",
"Marco",
""
]
] | The problem of the dynamical stability of anistropic systems is studied, by proposing a criterion in terms of the adiabatic local index $\gamma$. The result has general validity and can be applied to several physical situations. Configurations that cannot exist in the isotropic regime can exist in the anisotropic one. ... |
gr-qc/0212061 | Ujjal Debnath | Ujjal Debnath and Subenoy Chakraborty | Naked singularity formation for higher dimensional inhomogeneous dust
collapse | 7 Latex pages, No figure, Revtex style | null | null | null | gr-qc | null | We investigate the occurrence and nature of a naked singularity in the
gravitational collapse of an inhomogeneous dust cloud described by higher
dimensional Tolman-Bondi space-time. The naked singularities are found to be
gravitationally strong.
| [
{
"created": "Fri, 13 Dec 2002 16:53:47 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Feb 2003 11:07:48 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Debnath",
"Ujjal",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | We investigate the occurrence and nature of a naked singularity in the gravitational collapse of an inhomogeneous dust cloud described by higher dimensional Tolman-Bondi space-time. The naked singularities are found to be gravitationally strong. |
1405.3878 | Mauricio Cataldo MC | Mauricio Cataldo and Alberto A. Garc\'ia | Radiation in (2+1)-dimensions | 7 pages. Accepted for publication in Phys. Lett. B | Phys. Lett. B, 734, (2014) 58-63 | 10.1016/j.physletb.2014.05.019 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss the radiation equation of state $p=\rho/2$ in
(2+1)-dimensions. In (3+1)-dimensions the equation of state $p=\rho/3$ may be
used to describe either actual electromagnetic radiation (photons) as well as a
gas of massless particles in a thermodynamic equilibrium (for example
neutrinos). In this... | [
{
"created": "Thu, 15 May 2014 15:15:02 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Cataldo",
"Mauricio",
""
],
[
"García",
"Alberto A.",
""
]
] | In this paper we discuss the radiation equation of state $p=\rho/2$ in (2+1)-dimensions. In (3+1)-dimensions the equation of state $p=\rho/3$ may be used to describe either actual electromagnetic radiation (photons) as well as a gas of massless particles in a thermodynamic equilibrium (for example neutrinos). In this w... |
0710.2515 | Georgii Alekseev | G.A. Alekseev and V.A. Belinski | Superposition of fields of two Reissner - Nordstrom sources | 24 pages, submitted to the Proceedings of the Eleventh Marcel
Grossmann Meeting (Berlin, July 23 - 29, 2006) | null | 10.1142/9789812834300_0022 | null | gr-qc | null | In this paper we present a 5-parametric family of static asymptotically flat
solutions for the superposed gravitational and electromagnetic fields of two
Reissner-Nordstr\"om sources with arbitrary parameters -- masses, charges and
separating distance. A procedure for solving of the linear singular integral
equation ... | [
{
"created": "Fri, 12 Oct 2007 17:24:25 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Alekseev",
"G. A.",
""
],
[
"Belinski",
"V. A.",
""
]
] | In this paper we present a 5-parametric family of static asymptotically flat solutions for the superposed gravitational and electromagnetic fields of two Reissner-Nordstr\"om sources with arbitrary parameters -- masses, charges and separating distance. A procedure for solving of the linear singular integral equation fo... |
1104.1082 | Wessel Valkenburg | Wessel Valkenburg (RWTH Aachen) | Complete solutions to the metric of spherically collapsing dust in an
expanding spacetime with a cosmological constant | 23 pages, one figure. Numerical module for evaluation of the
solutions released at
http://web.physik.rwth-aachen.de/download/valkenburg/ColLambda/ Matches
published version, published under Open Access. Note change of title | Gen.Rel.Grav. 44 (2012) 2449-2476 | 10.1007/s10714-012-1405-9 | TTK-11-10 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present semi-analytical solutions to the background equations describing
the Lema\^itre-Tolman-Bondi (LTB) metric as well as the homogeneous Friedmann
equations, in the presence of dust, curvature and a cosmological constant
Lambda. For none of the presented solutions any numerical integration has to be
performed.... | [
{
"created": "Wed, 6 Apr 2011 13:02:36 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jun 2011 20:00:49 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Jul 2012 13:39:58 GMT",
"version": "v3"
}
] | 2015-03-19 | [
[
"Valkenburg",
"Wessel",
"",
"RWTH Aachen"
]
] | We present semi-analytical solutions to the background equations describing the Lema\^itre-Tolman-Bondi (LTB) metric as well as the homogeneous Friedmann equations, in the presence of dust, curvature and a cosmological constant Lambda. For none of the presented solutions any numerical integration has to be performed. A... |
gr-qc/9601033 | Alejandro Jakubi | Luis P. Chimento and Alejandro S. Jakubi | Relaxation dominated cosmological expansion | 7 pages, LaTeX. To be published in Physics Letters A | Physics Letters A 212 (1996) 320 | 10.1016/0375-9601(96)00024-2 | null | gr-qc | null | The behavior near the singularity of an isotropic, homogeneous cosmological
model with a viscous fluid source is investigated. This turns out to be a
relaxation dominated regime. Full extended irreversible thermodynamics is used,
and comparison with results of the truncated theory is made. New singular
behaviors are ... | [
{
"created": "Mon, 22 Jan 1996 18:50:41 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Chimento",
"Luis P.",
""
],
[
"Jakubi",
"Alejandro S.",
""
]
] | The behavior near the singularity of an isotropic, homogeneous cosmological model with a viscous fluid source is investigated. This turns out to be a relaxation dominated regime. Full extended irreversible thermodynamics is used, and comparison with results of the truncated theory is made. New singular behaviors are fo... |
0804.0948 | Muhammad Sharif | M. Sharif and M. Jamil Amir | Teleparallel Version of the Levi-Civita Vacuum Solutions and their
Energy Contents | 15 pages, accepted for publication in Canadian J. Physics | Can.J.Phys.86:1091-1096,2008 | 10.1139/P08-033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we find the teleparallel version of the Levi-Civita metric and
obtain tetrad and the torsion fields. The tensor, vector and the axial-vector
parts of the torsion tensor are evaluated. It is found that the vector part
lies along the radial direction only while the axial-vector vanishes everywhere
becaus... | [
{
"created": "Mon, 7 Apr 2008 02:27:58 GMT",
"version": "v1"
}
] | 2009-01-14 | [
[
"Sharif",
"M.",
""
],
[
"Amir",
"M. Jamil",
""
]
] | In this paper, we find the teleparallel version of the Levi-Civita metric and obtain tetrad and the torsion fields. The tensor, vector and the axial-vector parts of the torsion tensor are evaluated. It is found that the vector part lies along the radial direction only while the axial-vector vanishes everywhere because ... |
1210.1109 | Josep M. Pons | Naresh Dadhich and Josep M. Pons | Probing pure Lovelock gravity by Nariai and Bertotti-Robinson solutions | Title changed, contents reordered, changes in the introduction to
clarify some points | J. Math. Phys. 54, 102501 (2013) | 10.1063/1.4825115 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The product spacetimes of constant curvature describe in Einstein gravity,
which is linear in Riemann curvature, Nariai metric which is a solution of
$\Lambda$-vacuum when curvatures are equal, $k_1=k_2$, while it is
Bertotti-Robinson metric describing uniform electric field when curvatures are
equal and opposite, $k... | [
{
"created": "Wed, 3 Oct 2012 13:58:33 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Nov 2013 10:06:15 GMT",
"version": "v2"
}
] | 2013-11-18 | [
[
"Dadhich",
"Naresh",
""
],
[
"Pons",
"Josep M.",
""
]
] | The product spacetimes of constant curvature describe in Einstein gravity, which is linear in Riemann curvature, Nariai metric which is a solution of $\Lambda$-vacuum when curvatures are equal, $k_1=k_2$, while it is Bertotti-Robinson metric describing uniform electric field when curvatures are equal and opposite, $k_1... |
2203.07926 | Eduardo Bittencourt | Eduardo Bittencourt, Leandro G. Gomes, Grasiele B. Santos | On the intrinsically flat cosmological models in a lattice | 16 pages, 3 figures | null | 10.1088/1361-6382/ac96c3 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In this manuscript we investigate the intrinsically flat (space-flat)
spacetimes as viable cosmological models. We show that they have a natural
geometric structure which is suitable to describe inhomogeneous matter
distributions forming a periodic pattern throughout the space. We prove
theorems for their local repre... | [
{
"created": "Tue, 15 Mar 2022 14:07:04 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Bittencourt",
"Eduardo",
""
],
[
"Gomes",
"Leandro G.",
""
],
[
"Santos",
"Grasiele B.",
""
]
] | In this manuscript we investigate the intrinsically flat (space-flat) spacetimes as viable cosmological models. We show that they have a natural geometric structure which is suitable to describe inhomogeneous matter distributions forming a periodic pattern throughout the space. We prove theorems for their local represe... |
2209.12117 | Cheng-Yong Zhang | Chao Niu, Wei Xiong, Peng Liu, Cheng-Yong Zhang and Bin Wang | Dynamical descalarization in Einstein-Maxwell-scalar theory | 18 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For an asymptotically flat hairy black hole in the Einstein-Maxwell-scalar
(EMS) theory, we study the possibility of shedding off its scalar hair via
nonlinear scalar perturbation fully interacting with the background spacetime.
We examine the effect of the perturbation strength on the descalarization. The
results sh... | [
{
"created": "Sun, 25 Sep 2022 01:23:12 GMT",
"version": "v1"
}
] | 2022-09-27 | [
[
"Niu",
"Chao",
""
],
[
"Xiong",
"Wei",
""
],
[
"Liu",
"Peng",
""
],
[
"Zhang",
"Cheng-Yong",
""
],
[
"Wang",
"Bin",
""
]
] | For an asymptotically flat hairy black hole in the Einstein-Maxwell-scalar (EMS) theory, we study the possibility of shedding off its scalar hair via nonlinear scalar perturbation fully interacting with the background spacetime. We examine the effect of the perturbation strength on the descalarization. The results show... |
0801.1317 | Viqar Husain | Viqar Husain | Gravitational collapse in quantum gravity | 5 pages. Invited talk published in "Mathematical Physics: Proceedings
of the 12th. Regional Conference," Eds. J. Aslam et. al. (World Scientific,
Singapore, 2007) | null | null | null | gr-qc | null | We give a review of recent work aimed at understanding the dynamics of
gravitational collapse in quantum gravity. Its goal is to provide a
non-perturbative computational framework for understanding the emergence of the
semi-classical approximation and Hawking radiation. The model studied is the
gravity-scalar field t... | [
{
"created": "Tue, 8 Jan 2008 20:34:50 GMT",
"version": "v1"
}
] | 2008-01-09 | [
[
"Husain",
"Viqar",
""
]
] | We give a review of recent work aimed at understanding the dynamics of gravitational collapse in quantum gravity. Its goal is to provide a non-perturbative computational framework for understanding the emergence of the semi-classical approximation and Hawking radiation. The model studied is the gravity-scalar field the... |
0710.4058 | Edward Glass | J.P. Krisch and E.N. Glass | Collapsing Layers on Schwarzschild-Lemaitre Geodesics | To appear in Phys. Rev. D 15 | Phys.Rev.D76:104006,2007 | 10.1103/PhysRevD.76.104006 | null | gr-qc | null | We discuss Israel layers collapsing inward from rest at infinity along
Schwarzschild-Lemaitre geodesics. The dynamics of the collapsing layer and its
equation of state are developed. There is a general equation of state which is
approximately polytropic in the limit of very low pressure. The equation of
state establi... | [
{
"created": "Mon, 22 Oct 2007 18:19:45 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Krisch",
"J. P.",
""
],
[
"Glass",
"E. N.",
""
]
] | We discuss Israel layers collapsing inward from rest at infinity along Schwarzschild-Lemaitre geodesics. The dynamics of the collapsing layer and its equation of state are developed. There is a general equation of state which is approximately polytropic in the limit of very low pressure. The equation of state establish... |
1405.3715 | Ian Vega | Thomas P. Sotiriou, Ian Vega, Daniele Vernieri | Rotating black holes in three-dimensional Ho\v{r}ava gravity | 16 pages, 9 figures, final published version | Phys. Rev. D 90, 044046 (2014) | 10.1103/PhysRevD.90.044046 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study black holes in the infrared sector of three-dimensional Ho\v{r}ava
gravity. It is shown that black hole solutions with anti-de Sitter asymptotics
are admissible only in the sector of the theory in which the scalar degree of
freedom propagates infinitely fast. We derive the most general class of
stationary, c... | [
{
"created": "Wed, 14 May 2014 23:23:06 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Aug 2014 20:31:58 GMT",
"version": "v2"
}
] | 2014-08-26 | [
[
"Sotiriou",
"Thomas P.",
""
],
[
"Vega",
"Ian",
""
],
[
"Vernieri",
"Daniele",
""
]
] | We study black holes in the infrared sector of three-dimensional Ho\v{r}ava gravity. It is shown that black hole solutions with anti-de Sitter asymptotics are admissible only in the sector of the theory in which the scalar degree of freedom propagates infinitely fast. We derive the most general class of stationary, cir... |
2404.18147 | Sobhan Kazempour | Sobhan Kazempour and Amin Rezaei Akbarieh | The Cosmological Impact of Brane-Chern-Simons Massive Gravity | null | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | In this paper, we present a novel extension of massive gravity theory; the
Brane-Chern-Simons massive gravity theory. We explore the cosmological
implications of this theory by deriving the background equations and
demonstrating the existence of self-accelerating solutions. Interestingly, our
theory suggests the exis... | [
{
"created": "Sun, 28 Apr 2024 11:42:01 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Kazempour",
"Sobhan",
""
],
[
"Akbarieh",
"Amin Rezaei",
""
]
] | In this paper, we present a novel extension of massive gravity theory; the Brane-Chern-Simons massive gravity theory. We explore the cosmological implications of this theory by deriving the background equations and demonstrating the existence of self-accelerating solutions. Interestingly, our theory suggests the existe... |
2205.08130 | Stephan Rosswog | S. Rosswog, P. Diener, F. Torsello | Thinking outside the box: Numerical Relativity with particles | 36 pages, accepted for publication in Symmetry | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by-nc-nd/4.0/ | To date, essentially all simulation codes that solve the full set of
Einstein's equations are performed in the framework of Eulerian hydrodynamics.
The exception is our recently developed Numerical Relativity code SPHINCS_BSSN
which solves the commonly used BSSN formulation of the Einstein equations on a
structured m... | [
{
"created": "Tue, 17 May 2022 06:58:35 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jun 2022 21:49:15 GMT",
"version": "v2"
}
] | 2022-06-17 | [
[
"Rosswog",
"S.",
""
],
[
"Diener",
"P.",
""
],
[
"Torsello",
"F.",
""
]
] | To date, essentially all simulation codes that solve the full set of Einstein's equations are performed in the framework of Eulerian hydrodynamics. The exception is our recently developed Numerical Relativity code SPHINCS_BSSN which solves the commonly used BSSN formulation of the Einstein equations on a structured mes... |
gr-qc/0102046 | Lars Bildsten | Lars Bildsten (Institute for Theoretical Physics, UCSB) | Dissipation for Euler's Disk and a Desktop Demonstration of Coalescing
Neutron Stars | Submitted to American Journal of Physics | null | null | null | gr-qc astro-ph | null | I show that the recent calculation of Moffatt's regarding the viscous
dissipation of a spinning coin overlooked the importance of the finite width of
the viscous boundary layer. My new estimates are more in accord with that
observed. I also point out that the frequency ``chirp'' of the specially
designed toy ``Euler'... | [
{
"created": "Sun, 11 Feb 2001 23:40:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bildsten",
"Lars",
"",
"Institute for Theoretical Physics, UCSB"
]
] | I show that the recent calculation of Moffatt's regarding the viscous dissipation of a spinning coin overlooked the importance of the finite width of the viscous boundary layer. My new estimates are more in accord with that observed. I also point out that the frequency ``chirp'' of the specially designed toy ``Euler's ... |
1408.4759 | Jolyon Bloomfield | Jolyon K. Bloomfield, Clare Burrage, Anne-Christine Davis | The Shape Dependence of Vainshtein Screening | 11 pages, 1 figure; v2 publication version, minimal changes for
clarity | Phys. Rev. D 91, 083510 (2015) | 10.1103/PhysRevD.91.083510 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar field theories that possess a Vainshtein mechanism are able to
dynamically suppress the associated fifth forces in the presence of massive
sources through derivative non-linearities. The resulting equations of motion
for the scalar are highly non-linear and therefore very few analytic solutions
are known. Here... | [
{
"created": "Mon, 18 Aug 2014 19:59:58 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Aug 2015 01:28:42 GMT",
"version": "v2"
}
] | 2015-08-18 | [
[
"Bloomfield",
"Jolyon K.",
""
],
[
"Burrage",
"Clare",
""
],
[
"Davis",
"Anne-Christine",
""
]
] | Scalar field theories that possess a Vainshtein mechanism are able to dynamically suppress the associated fifth forces in the presence of massive sources through derivative non-linearities. The resulting equations of motion for the scalar are highly non-linear and therefore very few analytic solutions are known. Here w... |
2402.07965 | Dalibor Jav\r{u}rek | Dalibor Jav\r{u}rek | Extension of Theory of Gravitomagnetism and Spinor Quantum Mechanics
with Dynamics of Free Electromagnetic Field | 8 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The theory of Gravitomagnetism and spinor quantum mechanics describing the
interaction between the Dirac spinor field, the electromagnetic field, and a
weak gravitational field is extended by including the Lagrangian density of the
free electromagnetic field. It is shown that the newly added term in the
Lagrangian de... | [
{
"created": "Mon, 12 Feb 2024 11:58:32 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Feb 2024 08:18:54 GMT",
"version": "v2"
}
] | 2024-02-15 | [
[
"Javůrek",
"Dalibor",
""
]
] | The theory of Gravitomagnetism and spinor quantum mechanics describing the interaction between the Dirac spinor field, the electromagnetic field, and a weak gravitational field is extended by including the Lagrangian density of the free electromagnetic field. It is shown that the newly added term in the Lagrangian dens... |
1302.1206 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi, T. Padmanabhan | Thermality and Heat Content of horizons from infinitesimal coordinate
transformations | Published version | Eur. Phys. J. C 73 (2013) 2651 | 10.1140/epjc/s10052-013-2651-z | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/3.0/ | Thermal properties of a static horizon, (like the entropy S, heat content TS
etc.) can be obtained either from the surface term of the Einstein-Hilbert
action or by evaluating the Noether charge, corresponding to the
diffeomorphisms generated by the timelike Killing vector field. We show that,
for a wide class of geo... | [
{
"created": "Tue, 5 Feb 2013 21:06:17 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Nov 2013 07:35:03 GMT",
"version": "v2"
}
] | 2013-11-22 | [
[
"Majhi",
"Bibhas Ranjan",
""
],
[
"Padmanabhan",
"T.",
""
]
] | Thermal properties of a static horizon, (like the entropy S, heat content TS etc.) can be obtained either from the surface term of the Einstein-Hilbert action or by evaluating the Noether charge, corresponding to the diffeomorphisms generated by the timelike Killing vector field. We show that, for a wide class of geome... |
2205.13534 | William Barker Dr | W. E. V. Barker | Geometric multipliers and partial teleparallelism in Poincar\'e gauge
theory | Version accepted by PRD, added Fig. 1, added Section IIA, added
references, corrected typos in Appendix E | null | 10.1103/PhysRevD.108.024053 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The dynamics of the torsion-powered teleparallel theory are only viable
because thirty-six multiplier fields disable all components of the
Riemann--Cartan curvature. We generalise this suggestive approach by
considering Poincar\'e gauge theory in which sixty such `geometric multipliers'
can be invoked to disable any ... | [
{
"created": "Thu, 26 May 2022 17:53:04 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Aug 2023 15:15:14 GMT",
"version": "v2"
}
] | 2023-08-15 | [
[
"Barker",
"W. E. V.",
""
]
] | The dynamics of the torsion-powered teleparallel theory are only viable because thirty-six multiplier fields disable all components of the Riemann--Cartan curvature. We generalise this suggestive approach by considering Poincar\'e gauge theory in which sixty such `geometric multipliers' can be invoked to disable any gi... |
2011.12142 | Guo-Ping Li | Guo-Ping Li, Ke-Jian He and Bing-Bing Chen | Testing thermodynamic laws and weak cosmic censorship conjecture of
conformal anomaly corrected AdS black hole | 10 pages, 13 figures | Eur.Phys.J.Plus,136 (2021) 1, 2 | 10.1140/epjp/s13360-020-00953-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By dropping particles into black hole, we have employed the recently new
assumption [1] that the change of the black hole mass(enthalpy) should be the
same amount as the energy of an infalling particle($\omega = dM$), to carefully
test the laws of thermodynamics and the weak cosmic censorship conjecture of a
conforma... | [
{
"created": "Sun, 22 Nov 2020 03:06:23 GMT",
"version": "v1"
},
{
"created": "Sun, 16 May 2021 02:10:55 GMT",
"version": "v2"
}
] | 2021-05-18 | [
[
"Li",
"Guo-Ping",
""
],
[
"He",
"Ke-Jian",
""
],
[
"Chen",
"Bing-Bing",
""
]
] | By dropping particles into black hole, we have employed the recently new assumption [1] that the change of the black hole mass(enthalpy) should be the same amount as the energy of an infalling particle($\omega = dM$), to carefully test the laws of thermodynamics and the weak cosmic censorship conjecture of a conformal ... |
gr-qc/0007082 | Dobromila Nowak-Szczepaniak | J. Kowalski-Glikman and D. Nowak-Szczepaniak (University of Wroclaw) | Topological Black Holes in Quantum Gravity | 4pages, no figures, plain LaTeX | Phys.Lett. A277 (2000) 83-86 | 10.1016/S0375-9601(00)00687-3 | null | gr-qc | null | We derive the black hole solutions with horizons of non-trivial topology and
investigate their properties in the framework of an approach to quantum gravity
being an extension of Bohm's formulation of quantum mechanics. The solutions we
found tend asymptotically (for large $r$) to topological black holes. We also
ana... | [
{
"created": "Mon, 31 Jul 2000 11:24:11 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kowalski-Glikman",
"J.",
"",
"University of Wroclaw"
],
[
"Nowak-Szczepaniak",
"D.",
"",
"University of Wroclaw"
]
] | We derive the black hole solutions with horizons of non-trivial topology and investigate their properties in the framework of an approach to quantum gravity being an extension of Bohm's formulation of quantum mechanics. The solutions we found tend asymptotically (for large $r$) to topological black holes. We also analy... |
1707.08472 | Ghulam Abbas | G. Abbas and M. Tahir | Gravitational Perfect Fluid Collapse in Gauss-Bonnet Gravity | 16 pages, 3 Figures; some future research directions mentioned; to
appear in European Physical Journal C | Eur. Phys. J. C (2017) 77:537 | 10.1140/epjc/s10052-017-5114-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein Gauss-Bonnet theory of gravity is the low energy limit of
heterotic super-symmetric string theory. This paper deals gravitational
collapse of perfect fluid in Einstein Gauss-Bonnet gravity by considering the
Lemaitre - Tolman - Bondi metric. For this purpose, the closed form of exact
solution of equation... | [
{
"created": "Tue, 25 Jul 2017 17:24:22 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jul 2017 13:13:14 GMT",
"version": "v2"
}
] | 2018-01-12 | [
[
"Abbas",
"G.",
""
],
[
"Tahir",
"M.",
""
]
] | The Einstein Gauss-Bonnet theory of gravity is the low energy limit of heterotic super-symmetric string theory. This paper deals gravitational collapse of perfect fluid in Einstein Gauss-Bonnet gravity by considering the Lemaitre - Tolman - Bondi metric. For this purpose, the closed form of exact solution of equations ... |
1806.09530 | Ruth Durrer | George F R Ellis and Ruth Durrer | Note on the Kaiser-Peacock paper regarding gravitational lensing effects | 11 page,s 1 figure | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper revisits the controversy concerning whether gravitational lensing
effects make a significant difference to estimation of distance to the Cosmic
Microwave Background last scattering surface in cosmology. A recent paper by
Kaiser and Peacock supports a previous paper by Weinberg stating that such
affects ave... | [
{
"created": "Mon, 25 Jun 2018 15:37:05 GMT",
"version": "v1"
}
] | 2018-06-26 | [
[
"Ellis",
"George F R",
""
],
[
"Durrer",
"Ruth",
""
]
] | This paper revisits the controversy concerning whether gravitational lensing effects make a significant difference to estimation of distance to the Cosmic Microwave Background last scattering surface in cosmology. A recent paper by Kaiser and Peacock supports a previous paper by Weinberg stating that such affects avera... |
1007.0863 | Betti Hartmann | Betti Hartmann and Parinya Sirimachan | Geodesic motion in the space-time of a cosmic string | 20 pages including 14 figures; v2: references added, discussion on
null geodesics extended, numerical results added | JHEP 1008:110,2010 | 10.1007/JHEP08(2010)110 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geodesic equation in the space-time of an Abelian-Higgs string
and discuss the motion of massless and massive test particles. The geodesics
can be classified according to the particles energy, angular momentum and
linear momentum along the string axis. We observe that bound orbits of massive
particles ar... | [
{
"created": "Tue, 6 Jul 2010 11:19:30 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jul 2010 09:25:45 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Hartmann",
"Betti",
""
],
[
"Sirimachan",
"Parinya",
""
]
] | We study the geodesic equation in the space-time of an Abelian-Higgs string and discuss the motion of massless and massive test particles. The geodesics can be classified according to the particles energy, angular momentum and linear momentum along the string axis. We observe that bound orbits of massive particles are ... |
2403.12270 | Eduardo J S Villase\~nor | Marc Basquens, Antonio Lasanta, Emanuel Momp\'o, Valle Varo, Eduardo
J. S. Villase\~nor | Spacetime symmetries and geometric diffusion | 29 pages. Accepted for publication in Journal of Physics A:
Mathematical and Theoretical | J. Phys. A: Math. Theor. 57 (2024) 285204 | 10.1088/1751-8121/ad5a57 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We examine relativistic diffusion through the frame and observer bundles
associated with a Lorentzian manifold $(M,g)$. Our focus is on spacetimes with
a non-trivial isometry group, and we detail the conditions required to find
symmetric solutions of the relativistic diffusion equation. Additionally, we
analyze the c... | [
{
"created": "Mon, 18 Mar 2024 21:35:48 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Jun 2024 00:34:34 GMT",
"version": "v2"
}
] | 2024-07-01 | [
[
"Basquens",
"Marc",
""
],
[
"Lasanta",
"Antonio",
""
],
[
"Mompó",
"Emanuel",
""
],
[
"Varo",
"Valle",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We examine relativistic diffusion through the frame and observer bundles associated with a Lorentzian manifold $(M,g)$. Our focus is on spacetimes with a non-trivial isometry group, and we detail the conditions required to find symmetric solutions of the relativistic diffusion equation. Additionally, we analyze the con... |
gr-qc/9502003 | Maria Guimaraes | M. E. X. Guimar\~aes (Lab. Gravitation et Cosmologie Relativistes,
Paris, France) | Vacuum Polarization at Finite Temperature around a Magnetic Flux Cosmic
String | 22 pages, latex, no figures | Class.Quant.Grav.12:1705-1714,1995 | 10.1088/0264-9381/12/7/012 | GCR - 95 - 02 - 01 | gr-qc hep-th | null | We consider a general situation where a charged massive scalar field
$\phi(x)$ at finite temperature interacts with a magnetic flux cosmic string.
We determine a general expression for the Euclidean thermal Green's function of
the massive scalar field and a handy expression for a massless scalar field.
With this resu... | [
{
"created": "Wed, 1 Feb 1995 10:34:36 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Guimarães",
"M. E. X.",
"",
"Lab. Gravitation et Cosmologie Relativistes,\n Paris, France"
]
] | We consider a general situation where a charged massive scalar field $\phi(x)$ at finite temperature interacts with a magnetic flux cosmic string. We determine a general expression for the Euclidean thermal Green's function of the massive scalar field and a handy expression for a massless scalar field. With this result... |
gr-qc/0402032 | Kouji Nakamura | Kouji Nakamura | General framework of higher order gauge invariant perturbation theory | Prepared for the proceeding of the 13th Workshop on General
Relativity and Gravitation in Japan (Osaka City University). 4 pages, no
figure, latex format | null | null | null | gr-qc astro-ph hep-th math-ph math.MP | null | Based on the gauge invariant variables proposed in [K. Nakamura, Prog. Theor.
Phys. vol.110 (2003), 723.], general framework of the second order gauge
invariant perturbation theory on arbitrary background spacetime is considered.
We derived formulae of the perturbative Einstein tensor of each order, which
have the si... | [
{
"created": "Thu, 5 Feb 2004 10:53:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nakamura",
"Kouji",
""
]
] | Based on the gauge invariant variables proposed in [K. Nakamura, Prog. Theor. Phys. vol.110 (2003), 723.], general framework of the second order gauge invariant perturbation theory on arbitrary background spacetime is considered. We derived formulae of the perturbative Einstein tensor of each order, which have the simi... |
1806.04969 | Andronikos Paliathanasis | Andronikos Paliathanasis | Dynamical analysis and cosmological viability of varying $G$ and
$\Lambda$ cosmology | 13 pages, 4 figures, discussion improved, to appear in EPJC | null | 10.1140/epjc/s10052-018-6165-6 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological viability of varying $G\left( t\right) $ and $\Lambda \left(
t\right) $ cosmology is discussed by determining the cosmological eras provided
by the theory. Such a study is performed with the determination of the critical
points while stability analysis is performed. The application of
Renormalization... | [
{
"created": "Wed, 13 Jun 2018 12:05:21 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Aug 2018 09:51:32 GMT",
"version": "v2"
}
] | 2018-09-26 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | The cosmological viability of varying $G\left( t\right) $ and $\Lambda \left( t\right) $ cosmology is discussed by determining the cosmological eras provided by the theory. Such a study is performed with the determination of the critical points while stability analysis is performed. The application of Renormalization g... |
2009.04999 | YuZhu Chen | Yu-Zhu Chen, Shi-Lin Li, Yu-Jie Chen, Fu-Lin Zhang, Wu-Sheng Dai | Toy models of black hole, white hole and wormhole: thermal effects and
information loss problem | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, by setting proper boundaries in the Minkowski spacetime, we
construct three toy model spacetimes, a toy black hole, a toy white hole, and a
toy wormhole. Based on these model spacetimes, we discuss the Hawking radiation
and the information loss problem. By counting the number of the field modes
inside ... | [
{
"created": "Thu, 10 Sep 2020 17:09:50 GMT",
"version": "v1"
}
] | 2020-09-11 | [
[
"Chen",
"Yu-Zhu",
""
],
[
"Li",
"Shi-Lin",
""
],
[
"Chen",
"Yu-Jie",
""
],
[
"Zhang",
"Fu-Lin",
""
],
[
"Dai",
"Wu-Sheng",
""
]
] | In this paper, by setting proper boundaries in the Minkowski spacetime, we construct three toy model spacetimes, a toy black hole, a toy white hole, and a toy wormhole. Based on these model spacetimes, we discuss the Hawking radiation and the information loss problem. By counting the number of the field modes inside an... |
1811.04360 | Barak Shoshany | Laurent Freidel, Florian Girelli, Barak Shoshany | 2+1D Loop Quantum Gravity on the Edge | 44 pages, 7 figures; corrected minor typos and updated references | Phys. Rev. D 99, 046003 (2019) | 10.1103/PhysRevD.99.046003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a new perspective on the discretization of the phase space
structure of gravity in 2+1 dimensions as a piecewise-flat geometry in 2
spatial dimensions. Starting from a subdivision of the continuum geometric and
phase space structure into elementary cells, we obtain the loop gravity phase
space coupled to a... | [
{
"created": "Sun, 11 Nov 2018 06:03:07 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Nov 2018 06:07:58 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Feb 2019 14:03:36 GMT",
"version": "v3"
},
{
"created": "Wed, 1 Apr 2020 19:06:15 GMT",
"version": "v4"
}
] | 2020-04-03 | [
[
"Freidel",
"Laurent",
""
],
[
"Girelli",
"Florian",
""
],
[
"Shoshany",
"Barak",
""
]
] | We develop a new perspective on the discretization of the phase space structure of gravity in 2+1 dimensions as a piecewise-flat geometry in 2 spatial dimensions. Starting from a subdivision of the continuum geometric and phase space structure into elementary cells, we obtain the loop gravity phase space coupled to a c... |
gr-qc/9505044 | Michael Reisenberger | Michael Reisenberger | New constraints for canonical general relativity | Version to appear in Nuclear Physics B. Discussion of 4-diffeo
invariance, Dirac brackets improved. Proof of theorem connecting self-dual
2-forms and orthonormal tetrads replaced. Latex 57 pages, 7 uuencoded
postscript figures. Uses macro psfig.tex available from this archive (and
appended to this posting for y... | Nucl.Phys. B457 (1995) 643-687 | 10.1016/0550-3213(95)00448-3 | Utrecht University Institute of Theoretical Physics preprint
THU-95/14 | gr-qc | null | Ashtekar's canonical theory of classical complex Euclidean GR (no Lorentzian
reality conditions) is found to be invariant under the full algebra of
infinitesimal 4-diffeomorphisms, but non-invariant under some finite proper
4-diffeos when the densitized dreibein, $\tilE^a_i$, is degenerate. The
breakdown of 4-diffeo ... | [
{
"created": "Wed, 24 May 1995 11:02:42 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Nov 1995 02:38:24 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Reisenberger",
"Michael",
""
]
] | Ashtekar's canonical theory of classical complex Euclidean GR (no Lorentzian reality conditions) is found to be invariant under the full algebra of infinitesimal 4-diffeomorphisms, but non-invariant under some finite proper 4-diffeos when the densitized dreibein, $\tilE^a_i$, is degenerate. The breakdown of 4-diffeo in... |
2204.09095 | Deepen Garg | Deepen Garg and I. Y. Dodin | Gravitational wave modes in matter | 13 pages, 1 figure | J. Cosmol. Astropart. Phys 08 (2022) 017 | 10.1088/1475-7516/2022/08/017 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general linear gauge-invariant equation for dispersive gravitational waves
(GWs) propagating in matter is derived. This equation describes, on the same
footing, both the usual tensor modes and the gravitational modes strongly
coupled with matter. It is shown that the effect of matter on the former is
comparable to ... | [
{
"created": "Tue, 19 Apr 2022 18:59:04 GMT",
"version": "v1"
}
] | 2022-08-12 | [
[
"Garg",
"Deepen",
""
],
[
"Dodin",
"I. Y.",
""
]
] | A general linear gauge-invariant equation for dispersive gravitational waves (GWs) propagating in matter is derived. This equation describes, on the same footing, both the usual tensor modes and the gravitational modes strongly coupled with matter. It is shown that the effect of matter on the former is comparable to di... |
1809.10457 | Sanjar Shaymatov | Sanjar Shaymatov, Naresh Dadhich, Bobomurat Ahmedov | The higher dimensional Myers-Perry black hole with single rotation
always obeys the Cosmic Censorship Conjecture | 5 pages, no figures; Coincides with published version | Eur. Phys. J. C 79 (2019) 585 | 10.1140/epjc/s10052-019-7088-6 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Even though the Myers-Perry five dimensional rotating black hole with two
rotations could be overspun by test particle accretion, yet it turns out as we
show in this letter that it cannot do so for a single rotation. On the other
hand it is known that there exists no extremal limit for a black hole with
single rotati... | [
{
"created": "Thu, 27 Sep 2018 11:17:10 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Feb 2019 14:24:42 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Jul 2019 09:50:42 GMT",
"version": "v3"
}
] | 2019-09-04 | [
[
"Shaymatov",
"Sanjar",
""
],
[
"Dadhich",
"Naresh",
""
],
[
"Ahmedov",
"Bobomurat",
""
]
] | Even though the Myers-Perry five dimensional rotating black hole with two rotations could be overspun by test particle accretion, yet it turns out as we show in this letter that it cannot do so for a single rotation. On the other hand it is known that there exists no extremal limit for a black hole with single rotation... |
gr-qc/0301051 | M. Blagojevic | M. Blagojevic and M. Vasilic | Asymptotic symmetries in 3d gravity with torsion | 25 pages, RevTeX, no figures | Phys.Rev. D67 (2003) 084032 | 10.1103/PhysRevD.67.084032 | null | gr-qc hep-th | null | We study the nature of asymptotic symmetries in topological 3d gravity with
torsion. After introducing the concept of asymptotically anti-de Sitter
configuration, we find that the canonical realization of the asymptotic
symmetry is characterized by the Virasoro algebra with classical central
charge, the value of whic... | [
{
"created": "Wed, 15 Jan 2003 15:08:19 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Blagojevic",
"M.",
""
],
[
"Vasilic",
"M.",
""
]
] | We study the nature of asymptotic symmetries in topological 3d gravity with torsion. After introducing the concept of asymptotically anti-de Sitter configuration, we find that the canonical realization of the asymptotic symmetry is characterized by the Virasoro algebra with classical central charge, the value of which ... |
0712.0654 | Muhammad Sharif | M. Sharif and Umber Sheikh | Complex Wave Numbers in the Vicinity of the Schwarzschild Event Horizon | 21 pages, 9 figures, accepted for publication Int. J. Mod. Phys. A | Int.J.Mod.Phys.A23:1417-1433,2008 | 10.1142/S0217751X0803855X | null | gr-qc astro-ph | null | This paper is devoted to investigate the cold plasma wave properties outside
the event horizon of the Schwarzschild planar analogue. The dispersion
relations are obtained from the corresponding Fourier analyzed equations for
non-rotating and rotating, non-magnetized and magnetized backgrounds. These
dispersion relati... | [
{
"created": "Wed, 5 Dec 2007 05:43:40 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sharif",
"M.",
""
],
[
"Sheikh",
"Umber",
""
]
] | This paper is devoted to investigate the cold plasma wave properties outside the event horizon of the Schwarzschild planar analogue. The dispersion relations are obtained from the corresponding Fourier analyzed equations for non-rotating and rotating, non-magnetized and magnetized backgrounds. These dispersion relation... |
gr-qc/0608100 | Martin Bojowald | Martin Bojowald | Large scale effective theory for cosmological bounces | 5 pages, 1 figure; v2: more details on effective equations | Phys.Rev.D74:081301,2007 | 10.1103/PhysRevD.75.081301 | IGPG-06/8-1 | gr-qc astro-ph hep-th | null | An exactly solvable bounce model in loop quantum cosmology is identified
which serves as a perturbative basis for realistic bounce scenarios. Its
bouncing solutions are derived analytically, demonstrating why recent numerical
simulations robustly led to smooth bounces under the assumption of
semiclassicality. Several... | [
{
"created": "Mon, 21 Aug 2006 16:14:07 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Mar 2007 07:53:22 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bojowald",
"Martin",
""
]
] | An exactly solvable bounce model in loop quantum cosmology is identified which serves as a perturbative basis for realistic bounce scenarios. Its bouncing solutions are derived analytically, demonstrating why recent numerical simulations robustly led to smooth bounces under the assumption of semiclassicality. Several e... |
gr-qc/0009091 | Adrian Ottewill | Bruce Allen and Adrian C. Ottewill | Waveforms for Gravitational Radiation from Cosmic String Loops | 16 pages, 6 figures, Revtex | Phys.Rev. D63 (2001) 063507 | 10.1103/PhysRevD.63.063507 | null | gr-qc | null | We obtain general formulae for the plus- and cross- polarized waveforms of
gravitational radiation emitted by a cosmic string loop in transverse,
traceless (synchronous, harmonic) gauge. These equations are then specialized
to the case of piecewise linear loops, and it is shown that the general
waveform for such a lo... | [
{
"created": "Tue, 26 Sep 2000 16:34:14 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Allen",
"Bruce",
""
],
[
"Ottewill",
"Adrian C.",
""
]
] | We obtain general formulae for the plus- and cross- polarized waveforms of gravitational radiation emitted by a cosmic string loop in transverse, traceless (synchronous, harmonic) gauge. These equations are then specialized to the case of piecewise linear loops, and it is shown that the general waveform for such a loop... |
gr-qc/0304065 | Mustapha Ishak | Mustapha Ishak (1), Kayll Lake (2) ((1) Princeton University, (2)
Queen's University, Kingston) | An inverse approach to Einstein's equations for non-conducting fluids | 9 pages revtex4. Final form to appear in Phys Rev D | Phys.Rev.D68:104031,2003 | 10.1103/PhysRevD.68.104031 | null | gr-qc astro-ph.CO | null | We show that a flow (timelike congruence) in any type $B_{1}$ warped product
spacetime is uniquely and algorithmically determined by the condition of zero
flux. (Though restricted, these spaces include many cases of interest.) The
flow is written out explicitly for canonical representations of the spacetimes.
With th... | [
{
"created": "Thu, 17 Apr 2003 18:28:34 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jun 2003 22:05:26 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Oct 2003 19:52:23 GMT",
"version": "v3"
}
] | 2011-02-01 | [
[
"Ishak",
"Mustapha",
""
],
[
"Lake",
"Kayll",
""
]
] | We show that a flow (timelike congruence) in any type $B_{1}$ warped product spacetime is uniquely and algorithmically determined by the condition of zero flux. (Though restricted, these spaces include many cases of interest.) The flow is written out explicitly for canonical representations of the spacetimes. With the ... |
2401.03810 | Iarley P. Lobo Dr | Iarley P. Lobo | Time Delay in $\kappa$-Anti-de Sitter Spacetime | Title modified. Corrections on the translation parameters were made.
7 pages, 2 figures. Version published in PLB | Phys. Lett. B 855 (2024) 138864 | 10.1016/j.physletb.2024.138864 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Based on deformed translations in the $\kappa$-anti-de Sitter algebra, we
derive a delay in the time of detection between a soft and a hard photon, which
are simultaneously emitted at a distant event, to first order in the quantum
gravity parameter. In the basis analyzed, the trajectories are undeformed, and
the effe... | [
{
"created": "Mon, 8 Jan 2024 10:59:06 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2024 10:22:21 GMT",
"version": "v2"
},
{
"created": "Thu, 18 Jul 2024 12:17:51 GMT",
"version": "v3"
}
] | 2024-07-19 | [
[
"Lobo",
"Iarley P.",
""
]
] | Based on deformed translations in the $\kappa$-anti-de Sitter algebra, we derive a delay in the time of detection between a soft and a hard photon, which are simultaneously emitted at a distant event, to first order in the quantum gravity parameter. In the basis analyzed, the trajectories are undeformed, and the effect... |
0905.0543 | Guido Cognola | Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov,
Sergio Zerbini | One-loop effective action for non-local modified Gauss-Bonnet gravity in
de Sitter space | latex file, 17 pages, 4 figures. Published version. Significative
improvement and new references | Eur.Phys.J.C64:483-494,2009 | 10.1140/epjc/s10052-009-1154-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the classical and quantum properties of non-local modified
Gauss-Bonnet gravity in de Sitter space, using its equivalent representation
via string-inspired local scalar-Gauss-Bonnet gravity with a scalar potential.
A classical, multiply de Sitter universe solution is found where one of the de
Sitter phases... | [
{
"created": "Tue, 5 May 2009 08:07:16 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Sep 2009 06:50:09 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Cognola",
"Guido",
""
],
[
"Elizalde",
"Emilio",
""
],
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Zerbini",
"Sergio",
""
]
] | We discuss the classical and quantum properties of non-local modified Gauss-Bonnet gravity in de Sitter space, using its equivalent representation via string-inspired local scalar-Gauss-Bonnet gravity with a scalar potential. A classical, multiply de Sitter universe solution is found where one of the de Sitter phases c... |
0806.2418 | Mohammad Reza Setare | P. Moyassari, and M. R. Setare | Quintom dark energy in DGP braneworld cosmology | 12 pages, 8 figures | Phys.Lett.B674:237-242,2009 | 10.1016/j.physletb.2009.03.051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider a $Z_2$ symmetrical 3-brane embedded in a
5-dimensional spacetime. We study the effective Einstein equation and
acceleration condition in presence of the quintom dark energy fluid as the bulk
matter field. It is shown that the time-dependent bulk quintom field induces a
time-dependent cosmol... | [
{
"created": "Sun, 15 Jun 2008 05:15:36 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Apr 2009 10:30:26 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Moyassari",
"P.",
""
],
[
"Setare",
"M. R.",
""
]
] | In this paper we consider a $Z_2$ symmetrical 3-brane embedded in a 5-dimensional spacetime. We study the effective Einstein equation and acceleration condition in presence of the quintom dark energy fluid as the bulk matter field. It is shown that the time-dependent bulk quintom field induces a time-dependent cosmolog... |
1906.10662 | Jean Alexandre | Jean Alexandre and Katy Clough | Saving the universe with finite volume effects | 8 pages, 2 figures, comments and references added | Phys. Rev. D 100, 103522 (2019) | 10.1103/PhysRevD.100.103522 | KCL-PH-TH/2019-70 | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Setting aside anthropic arguments, there is no reason why the universe should
initially favour a net expanding phase rather than one experiencing a net
contraction. However, a collapsing universe containing "normal" matter will end
at a singularity in a finite time. We point out that there is a mechanism,
derived fro... | [
{
"created": "Tue, 25 Jun 2019 16:56:15 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Oct 2019 17:05:02 GMT",
"version": "v2"
}
] | 2019-11-20 | [
[
"Alexandre",
"Jean",
""
],
[
"Clough",
"Katy",
""
]
] | Setting aside anthropic arguments, there is no reason why the universe should initially favour a net expanding phase rather than one experiencing a net contraction. However, a collapsing universe containing "normal" matter will end at a singularity in a finite time. We point out that there is a mechanism, derived from ... |
2108.04154 | Bradley James Kavanagh | Adam Coogan, Gianfranco Bertone, Daniele Gaggero, Bradley J. Kavanagh,
David A. Nichols | Measuring the dark matter environments of black hole binaries with
gravitational waves | 16 pages + 3 appendices, 8 figures. Code available online at
https://github.com/adam-coogan/pydd . v2: Matches version published in PRD | Phys. Rev. D 105, 043009 (2022) | 10.1103/PhysRevD.105.043009 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Large dark matter overdensities can form around black holes of astrophysical
and primordial origin as they form and grow. This "dark dress" inevitably
affects the dynamical evolution of binary systems, and induces a dephasing in
the gravitational waveform that can be probed with future interferometers. In
this paper,... | [
{
"created": "Mon, 9 Aug 2021 16:25:55 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Apr 2022 11:04:38 GMT",
"version": "v2"
}
] | 2022-04-04 | [
[
"Coogan",
"Adam",
""
],
[
"Bertone",
"Gianfranco",
""
],
[
"Gaggero",
"Daniele",
""
],
[
"Kavanagh",
"Bradley J.",
""
],
[
"Nichols",
"David A.",
""
]
] | Large dark matter overdensities can form around black holes of astrophysical and primordial origin as they form and grow. This "dark dress" inevitably affects the dynamical evolution of binary systems, and induces a dephasing in the gravitational waveform that can be probed with future interferometers. In this paper, w... |
1011.2536 | Volker Perlick | Volker Perlick | On the hyperbolicity of Maxwell's equations with a local constitutive
law | 21 pages, no figures. Revised version contains 3 more references and
several minor corrections. To appear in J. Math. Phys | J. Math. Phys. 52, 042903 (2011) | 10.1063/1.3579133 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Maxwell's equations are considered in metric-free form, with a local but
otherwise arbitrary constitutive law. After splitting Maxwell's equations into
evolution equations and constraints, we derive the characteristic equation and
we discuss its properties in detail. We present several results that are
relevant for t... | [
{
"created": "Thu, 11 Nov 2010 00:04:40 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2011 12:47:59 GMT",
"version": "v2"
}
] | 2015-08-11 | [
[
"Perlick",
"Volker",
""
]
] | Maxwell's equations are considered in metric-free form, with a local but otherwise arbitrary constitutive law. After splitting Maxwell's equations into evolution equations and constraints, we derive the characteristic equation and we discuss its properties in detail. We present several results that are relevant for the... |
1511.02220 | Carlos Hidalgo | Adam J. Christopherson, Juan Carlos Hidalgo, Cornelius Rampf, Karim A.
Malik | Second-order cosmological perturbation theory and initial conditions for
$N$-body simulations | V2: Second order density added and other expressions simplified.
References updated. 15 pages | Phys. Rev. D 93, 043539 (2016) | 10.1103/PhysRevD.93.043539 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use gauge-invariant cosmological perturbation theory to calculate the
displacement field that sets the initial conditions for $N$-body simulations.
Using first and second-order fully relativistic perturbation theory in the
synchronous-comoving gauge, allows us to go beyond the Newtonian predictions
and to calculat... | [
{
"created": "Fri, 6 Nov 2015 20:27:46 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Dec 2015 02:59:30 GMT",
"version": "v2"
}
] | 2016-03-02 | [
[
"Christopherson",
"Adam J.",
""
],
[
"Hidalgo",
"Juan Carlos",
""
],
[
"Rampf",
"Cornelius",
""
],
[
"Malik",
"Karim A.",
""
]
] | We use gauge-invariant cosmological perturbation theory to calculate the displacement field that sets the initial conditions for $N$-body simulations. Using first and second-order fully relativistic perturbation theory in the synchronous-comoving gauge, allows us to go beyond the Newtonian predictions and to calculate ... |
1509.04971 | Dominic Dold | Dominic Dold | Unstable mode solutions to the Klein-Gordon equation in Kerr-anti-de
Sitter spacetimes | 56 pages, 2 figures, final version with minor changes, to appear in
Comm. Math. Phys | null | 10.1007/s00220-016-2783-8 | null | gr-qc hep-th math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For any cosmological constant $\Lambda=-3/\ell^2<0$ and any $\alpha<9/4$, we
find a Kerr-AdS spacetime $(\mathcal M,g_{\mathrm{KAdS}})$, in which the
Klein-Gordon equation $\Box_{g_{\mathrm{KAdS}}}\psi+\alpha/\ell^2\psi=0$ has an
exponentially growing mode solution satisfying a Dirichlet boundary condition
at infinit... | [
{
"created": "Wed, 16 Sep 2015 16:31:30 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Aug 2016 13:13:42 GMT",
"version": "v2"
}
] | 2016-11-23 | [
[
"Dold",
"Dominic",
""
]
] | For any cosmological constant $\Lambda=-3/\ell^2<0$ and any $\alpha<9/4$, we find a Kerr-AdS spacetime $(\mathcal M,g_{\mathrm{KAdS}})$, in which the Klein-Gordon equation $\Box_{g_{\mathrm{KAdS}}}\psi+\alpha/\ell^2\psi=0$ has an exponentially growing mode solution satisfying a Dirichlet boundary condition at infinity.... |
1301.1109 | Hiromi Saida | Hiromi Saida | Universal Property of Quantum Gravity implied by Bekenstein-Hawking
Entropy and Boltzmann formula | This article is bease on ref.[4] (Entropy 13(2011)1611-1647), but the
conclusion in sec.4 is modified from ref.[4]. This is a refereed proceeding
article of International Conference on Mathematical Modeling in Physical
Sciences (IC-Msquare 2012) | null | 10.1088/1742-6596/410/1/012139 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We search for a universal property of quantum gravity. By "universal", we
mean the independence from any existing model of quantum gravity (such as the
super string theory, loop quantum gravity, causal dynamical triangulation, and
so on). To do so, we try to put the basis of our discussion on theories
established by ... | [
{
"created": "Mon, 7 Jan 2013 04:37:24 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Saida",
"Hiromi",
""
]
] | We search for a universal property of quantum gravity. By "universal", we mean the independence from any existing model of quantum gravity (such as the super string theory, loop quantum gravity, causal dynamical triangulation, and so on). To do so, we try to put the basis of our discussion on theories established by so... |
1405.7904 | Evan Goetz | The LIGO Scientific Collaboration and the Virgo Collaboration: J.
Aasi, B. P. Abbott, R. Abbott, T. Abbott, M. R. Abernathy, T. Accadia, F.
Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, C.
Affeldt, M. Agathos, N. Aggarwal, O. D. Aguiar, A. Ain, P. Ajith, A. Alemic,
B. Allen, A. Allocca, D... | First all-sky search for continuous gravitational waves from unknown
sources in binary systems | 16 pages, 6 figures | Phys. Rev. D 90, 062010 (2014) | 10.1103/PhysRevD.90.062010 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first results of an all-sky search for continuous
gravitational waves from unknown spinning neutron stars in binary systems using
LIGO and Virgo data. Using a specially developed analysis program, the TwoSpect
algorithm, the search was carried out on data from the sixth LIGO Science Run
and the second ... | [
{
"created": "Fri, 30 May 2014 16:10:01 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Sep 2014 09:02:57 GMT",
"version": "v2"
}
] | 2014-09-24 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Aasi",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T.",
""
],
[
"Abernathy",
"M. R.",
... | We present the first results of an all-sky search for continuous gravitational waves from unknown spinning neutron stars in binary systems using LIGO and Virgo data. Using a specially developed analysis program, the TwoSpect algorithm, the search was carried out on data from the sixth LIGO Science Run and the second an... |
gr-qc/9312024 | Michael P. Ryan | Michael P. Ryan Jr | Cosmological "Ground State" Wave Functions in Gravity and
Electromagnetism | 15 pages, Plain TEX | null | null | null | gr-qc | null | The coincidence of quantum cosmology solutions generated by solving a
Euclidean version of the Hamilton-Jacobi equation for gravity and by using the
complex canonical transformation of the Ashtekar variables is discussed. An
examination of similar solutions for the free electromagnetic field shows that
this coinciden... | [
{
"created": "Wed, 15 Dec 1993 17:58:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ryan",
"Michael P.",
"Jr"
]
] | The coincidence of quantum cosmology solutions generated by solving a Euclidean version of the Hamilton-Jacobi equation for gravity and by using the complex canonical transformation of the Ashtekar variables is discussed. An examination of similar solutions for the free electromagnetic field shows that this coincidence... |
1307.2213 | Sourav Bhattacharya | Sourav Bhattacharya | Note on black hole no hair theorems for massive forms and spin-1/2
fields | v2, 15pp; added references and discussions, typos corrected; slight
change in title to match published version | Phys. Rev. D 88, 044053 (2013) | 10.1103/PhysRevD.88.044053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a proof of the non-perturbative no hair theorems for a massive 2-form
field with 3-form field strength for general stationary axisymmetric and static
(anti)-de Sitter or asymptotically flat black hole spacetimes with some
suitable geometrical properties. The generalization of this result for higher
form field... | [
{
"created": "Mon, 8 Jul 2013 19:41:02 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Aug 2013 05:02:51 GMT",
"version": "v2"
}
] | 2013-09-03 | [
[
"Bhattacharya",
"Sourav",
""
]
] | We give a proof of the non-perturbative no hair theorems for a massive 2-form field with 3-form field strength for general stationary axisymmetric and static (anti)-de Sitter or asymptotically flat black hole spacetimes with some suitable geometrical properties. The generalization of this result for higher form fields ... |
2204.07869 | Tupac Bravo Ibarra | Tupac Bravo, Dennis R\"atzel, Ivette Fuentes | Gravitational time dilation in extended quantum systems: the case of
light clocks in Schwarzschild spacetime | updated references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The precision of optical atomic clocks is approaching a regime where they
resolve gravitational time dilation on smaller scales than their own
extensions. Hence, an accurate description of quantum clocks has to take their
spatial extension into account. In this article, as a first step towards a
fully relativistic de... | [
{
"created": "Sat, 16 Apr 2022 20:30:42 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Apr 2022 01:01:28 GMT",
"version": "v2"
},
{
"created": "Thu, 12 May 2022 02:06:18 GMT",
"version": "v3"
}
] | 2022-05-13 | [
[
"Bravo",
"Tupac",
""
],
[
"Rätzel",
"Dennis",
""
],
[
"Fuentes",
"Ivette",
""
]
] | The precision of optical atomic clocks is approaching a regime where they resolve gravitational time dilation on smaller scales than their own extensions. Hence, an accurate description of quantum clocks has to take their spatial extension into account. In this article, as a first step towards a fully relativistic desc... |
1601.01260 | Pieter Miedema | P. G. Miedema | Structure Formation in the Early Universe | 21 pages, 2 figures. Thoroughly rewritten, references added, draws
heavily on arXiv:1106.0627 | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evolution of the perturbations in the energy density and the particle
number density in a flat Friedmann-Lemaitre-Robertson-Walker universe in the
radiation-dominated era and in the epoch after decoupling of matter and
radiation is studied. For large-scale perturbations the outcome is in
accordance with treatment... | [
{
"created": "Sun, 3 Jan 2016 14:53:49 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2016 12:23:39 GMT",
"version": "v2"
},
{
"created": "Sun, 7 Mar 2021 11:54:29 GMT",
"version": "v3"
}
] | 2021-03-09 | [
[
"Miedema",
"P. G.",
""
]
] | The evolution of the perturbations in the energy density and the particle number density in a flat Friedmann-Lemaitre-Robertson-Walker universe in the radiation-dominated era and in the epoch after decoupling of matter and radiation is studied. For large-scale perturbations the outcome is in accordance with treatments ... |
gr-qc/0010113 | Merced Montesinos | Merced Montesinos and Jose David Vergara | Gauge invariance of complex general relativity | 9 pages, Latex file, no figures. To be published in Gen. Rel. Grav | Gen.Rel.Grav. 33 (2001) 921-929 | 10.1023/A:1010268110661 | null | gr-qc | null | In this paper it is implemented how to make compatible the boundary
conditions and the gauge fixing conditions for complex general relativity
written in terms of Ashtekar variables using the Henneaux-Teitelboim-Vergara
approach. Moreover, it is found that at first order in the gauge parameters,
the Hamiltonian action... | [
{
"created": "Tue, 31 Oct 2000 17:03:18 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Montesinos",
"Merced",
""
],
[
"Vergara",
"Jose David",
""
]
] | In this paper it is implemented how to make compatible the boundary conditions and the gauge fixing conditions for complex general relativity written in terms of Ashtekar variables using the Henneaux-Teitelboim-Vergara approach. Moreover, it is found that at first order in the gauge parameters, the Hamiltonian action i... |
1611.09223 | Antonio Enea Romano | Camilo Santa Velez, Antonio Enea Romano | Newton gauge cosmological perturbations for static spherically symmetric
modifications of the de Sitter metric | 20 pages, version accepted by JCAP, typo in the title corrected | null | 10.1088/1475-7516/2018/05/041 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Static coordinates can be convenient to solve the vacuum Einstein's equations
in presence of spherical symmetry, but for cosmological applications comoving
coordinates are more suitable to describe an expanding Universe, especially in
the framework of cosmological perturbation theory (CPT). Using CPT we develop a
met... | [
{
"created": "Thu, 24 Nov 2016 20:28:37 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Mar 2017 14:54:31 GMT",
"version": "v2"
},
{
"created": "Fri, 4 May 2018 09:40:55 GMT",
"version": "v3"
},
{
"created": "Mon, 31 May 2021 17:55:43 GMT",
"version": "v4"
}
] | 2021-06-01 | [
[
"Velez",
"Camilo Santa",
""
],
[
"Romano",
"Antonio Enea",
""
]
] | Static coordinates can be convenient to solve the vacuum Einstein's equations in presence of spherical symmetry, but for cosmological applications comoving coordinates are more suitable to describe an expanding Universe, especially in the framework of cosmological perturbation theory (CPT). Using CPT we develop a metho... |
1907.03012 | Marius Oltean | Marius Oltean, Richard J. Epp, Carlos F. Sopuerta, Alessandro D. A. M.
Spallicci, Robert B. Mann | Motion of localized sources in general relativity: gravitational
self-force from quasilocal conservation laws | v1: 41 pages, 12 figures. To be submitted for publication, comments
welcome; v2: 42 pages. Comments and references added; v3: Matches published
version | Phys. Rev. D 101, 064060 (2020) | 10.1103/PhysRevD.101.064060 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An idealized "test" object in general relativity moves along a geodesic.
However, if the object has a finite mass, this will create additional curvature
in the spacetime, causing it to deviate from geodesic motion. If the mass is
nonetheless sufficiently small, such an effect is usually treated
perturbatively and is ... | [
{
"created": "Fri, 5 Jul 2019 20:09:20 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Nov 2019 18:06:51 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Mar 2020 18:38:47 GMT",
"version": "v3"
}
] | 2020-03-30 | [
[
"Oltean",
"Marius",
""
],
[
"Epp",
"Richard J.",
""
],
[
"Sopuerta",
"Carlos F.",
""
],
[
"Spallicci",
"Alessandro D. A. M.",
""
],
[
"Mann",
"Robert B.",
""
]
] | An idealized "test" object in general relativity moves along a geodesic. However, if the object has a finite mass, this will create additional curvature in the spacetime, causing it to deviate from geodesic motion. If the mass is nonetheless sufficiently small, such an effect is usually treated perturbatively and is kn... |
gr-qc/0204048 | Sanjeev S. Seahra | Paul S. Wesson | Classical and quantized aspects of dynamics in five dimensional
relativity | 26 pages, in press in Class. Quant. Grav | Class.Quant.Grav. 19 (2002) 2825-2834 | 10.1088/0264-9381/19/11/306 | null | gr-qc | null | A null path in 5D can appear as a timelike path in 4D, and for a certain
gauge in 5D the motion of a massive particle in 4D obeys the usual quantization
rule with an uncertainty-type relation. Generalizations of this result are
discussed in regard to induced-matter and membrane theory.
| [
{
"created": "Mon, 15 Apr 2002 12:48:33 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Wesson",
"Paul S.",
""
]
] | A null path in 5D can appear as a timelike path in 4D, and for a certain gauge in 5D the motion of a massive particle in 4D obeys the usual quantization rule with an uncertainty-type relation. Generalizations of this result are discussed in regard to induced-matter and membrane theory. |
gr-qc/0203039 | Nils Andersson | N. Andersson, G.L. Comer and D. Langlois | Oscillations of General Relativistic Superfluid Neutron Stars | 27 RevTeX pages, 6 eps figures | Phys.Rev. D66 (2002) 104002 | 10.1103/PhysRevD.66.104002 | null | gr-qc astro-ph | null | We develop a general formalism to treat, in general relativity, the nonradial
oscillations of a superfluid neutron star about static (non-rotating)
configurations. The matter content of these stars can, as a first
approximation, be described by a two-fluid model: one fluid is the neutron
superfluid, which is believed... | [
{
"created": "Tue, 12 Mar 2002 15:27:52 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Andersson",
"N.",
""
],
[
"Comer",
"G. L.",
""
],
[
"Langlois",
"D.",
""
]
] | We develop a general formalism to treat, in general relativity, the nonradial oscillations of a superfluid neutron star about static (non-rotating) configurations. The matter content of these stars can, as a first approximation, be described by a two-fluid model: one fluid is the neutron superfluid, which is believed t... |
1607.03396 | Sourav Dutta | Sourav Dutta, Muthusamy Lakshmanan and Subenoy Chakraborty | Quintom cosmological model and some possible solutions using Lie and
Noether symmetries | 14 pages, 6 figures, accepted in IJMPD | International Journal of Modern Physics D, Vol. 25, No. 14 (2016)
1650110 (17 pages) | 10.1142/S0218271816501108 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work deals with a quintom model of dark energy in the framework
of a spatially flat isotropic and homogeneous
Friedmann-Lemaitre-Robertson-Walker (FLRW) universe. At first, Lie point
symmetry is imposed to the system and the unknown coupled potential of the
model is determined. Then Noether symmetry, whic... | [
{
"created": "Wed, 29 Jun 2016 07:19:37 GMT",
"version": "v1"
}
] | 2016-09-27 | [
[
"Dutta",
"Sourav",
""
],
[
"Lakshmanan",
"Muthusamy",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The present work deals with a quintom model of dark energy in the framework of a spatially flat isotropic and homogeneous Friedmann-Lemaitre-Robertson-Walker (FLRW) universe. At first, Lie point symmetry is imposed to the system and the unknown coupled potential of the model is determined. Then Noether symmetry, which ... |
1711.06220 | Muhammad Sharif | M. Sharif and Aisha Siddiqa | Polarization Modes of Gravitational Wave for Viable f(R) Models | 15 pages, no figure, to appear in Astrophys. Space Sci | Astrophys. Space Sci. 362(2017)226 | 10.1007/s10509-017-3207-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the gravitational wave polarization modes for some
particular $f(R)$ models using Newman-Penrose formalism. We find two extra
scalar modes of gravitational wave (longitudinal and transversal modes) in
addition to two tensor modes of general relativity. We conclude that
gravitational waves corr... | [
{
"created": "Sat, 11 Nov 2017 05:06:22 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Sharif",
"M.",
""
],
[
"Siddiqa",
"Aisha",
""
]
] | In this paper, we study the gravitational wave polarization modes for some particular $f(R)$ models using Newman-Penrose formalism. We find two extra scalar modes of gravitational wave (longitudinal and transversal modes) in addition to two tensor modes of general relativity. We conclude that gravitational waves corres... |
0908.0186 | Yousuke Itoh | Yousuke Itoh, Toshifumi Futamase, Makoto Hattori | A method to measure a relative transverse velocity of
source-lens-observer system using gravitational lensing of gravitational
waves | 27 pages, 9 figures. Accepted for publication in Physical Review D | Phys.Rev.D80:044009,2009 | 10.1103/PhysRevD.80.044009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves propagate along null geodesics like light rays in the
geometrical optics approximation, and they may have a chance to suffer from
gravitational lensing by intervening objects, as is the case for
electromagnetic waves. Long wavelength of gravitational waves and compactness
of possible sources may e... | [
{
"created": "Mon, 3 Aug 2009 04:31:48 GMT",
"version": "v1"
}
] | 2010-10-12 | [
[
"Itoh",
"Yousuke",
""
],
[
"Futamase",
"Toshifumi",
""
],
[
"Hattori",
"Makoto",
""
]
] | Gravitational waves propagate along null geodesics like light rays in the geometrical optics approximation, and they may have a chance to suffer from gravitational lensing by intervening objects, as is the case for electromagnetic waves. Long wavelength of gravitational waves and compactness of possible sources may ena... |
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