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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0607040 | Mohamed Ahmed | M.A. Ahmed | Cosmology in two-dimensional dilaton gravity theories | 19 pages | Nuovo Cim.B121:661-673,2006 | 10.1393/ncb/i2006-10104-0 | null | gr-qc | null | We study some aspects of classical & quantum cosmology in the context of
two-dimensionsal dilaton gravity theories with matter being described by a
perfect fluid. We derive the classical equations obeyed by the metric function
& the dilaton field. An impicit solution for the metric function is obtained &
used to disc... | [
{
"created": "Mon, 10 Jul 2006 21:30:34 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Ahmed",
"M. A.",
""
]
] | We study some aspects of classical & quantum cosmology in the context of two-dimensionsal dilaton gravity theories with matter being described by a perfect fluid. We derive the classical equations obeyed by the metric function & the dilaton field. An impicit solution for the metric function is obtained & used to discus... |
1512.08460 | Igor Khavkine | Igor Khavkine | A polynomial action for gravity with matter, gauge-fixing and ghosts | Based on a talk given at the 20th International Summer School on
Global Analysis and its Applications, Stara Lesna, Slovakia (August, 2015) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We give a variational formulation of General Relativity, with coupling to a
cosmological constant, to scalar fields, to vector fields and to spinor fields
(all with possible mass and interaction terms). Among the matter fields, we
include ghosts corresponding to diffeomorphism and Yang-Mills gauge symmetries,
with ki... | [
{
"created": "Mon, 28 Dec 2015 17:09:13 GMT",
"version": "v1"
}
] | 2015-12-29 | [
[
"Khavkine",
"Igor",
""
]
] | We give a variational formulation of General Relativity, with coupling to a cosmological constant, to scalar fields, to vector fields and to spinor fields (all with possible mass and interaction terms). Among the matter fields, we include ghosts corresponding to diffeomorphism and Yang-Mills gauge symmetries, with kine... |
1109.6107 | Hao Wei | Hao Wei | Dynamics of Teleparallel Dark Energy | 14 pages, 4 tables, revtex4; v2: discussions added, Phys. Lett. B in
press; v3: published version | Phys.Lett.B712:430-436,2012 | 10.1016/j.physletb.2012.05.006 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, Geng et al. proposed to allow a non-minimal coupling between
quintessence and gravity in the framework of teleparallel gravity, motivated by
the similar one in the framework of General Relativity (GR). They found that
this non-minimally coupled quintessence in the framework of teleparallel
gravity has a ric... | [
{
"created": "Wed, 28 Sep 2011 06:01:00 GMT",
"version": "v1"
},
{
"created": "Fri, 4 May 2012 11:45:00 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Jun 2012 04:36:00 GMT",
"version": "v3"
}
] | 2012-06-04 | [
[
"Wei",
"Hao",
""
]
] | Recently, Geng et al. proposed to allow a non-minimal coupling between quintessence and gravity in the framework of teleparallel gravity, motivated by the similar one in the framework of General Relativity (GR). They found that this non-minimally coupled quintessence in the framework of teleparallel gravity has a riche... |
2404.14816 | Kirill Bronnikov | Kirill A. Bronnikov | Regular black holes as an alternative to black bounce | 14 pages, 5 figures. Discussion updated, references added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The so-called black bounce mechanism of singularity suppression, proposed by
Simpson and Visser, consists in replacing the spherical radius $r$ in the
metric tensor with $\sqrt{r^2 + a^2}$, $a = \rm const >0$. This removes a
singularity at $r=0$ and its neighborhood from space-time, and there emerges a
regular minimu... | [
{
"created": "Tue, 23 Apr 2024 08:02:00 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Apr 2024 10:15:01 GMT",
"version": "v2"
}
] | 2024-04-29 | [
[
"Bronnikov",
"Kirill A.",
""
]
] | The so-called black bounce mechanism of singularity suppression, proposed by Simpson and Visser, consists in replacing the spherical radius $r$ in the metric tensor with $\sqrt{r^2 + a^2}$, $a = \rm const >0$. This removes a singularity at $r=0$ and its neighborhood from space-time, and there emerges a regular minimum ... |
gr-qc/9709059 | Alex Kaganovich | E. I. Guendelman and A. B. Kaganovich | From inflation to a zero cosmological constant phase without fine tuning | revised version containes an improved model where fine tuning is not
needed for transition to a zero cosmological constant phase. 5 pages. To
appear in Phys. Rev. D | Phys.Rev. D57 (1998) 7200-7203 | 10.1103/PhysRevD.57.7200 | null | gr-qc | null | We show that it is possible to obtain inflation and also solve the
cosmological constant problem. The theory is invariant under changes of the
Lagrangian density $L$ to $L+const$. Then the constant part of a scalar field
potential $V$ cannot be responsible for inflation. However, we show that
inflation can be driven ... | [
{
"created": "Wed, 24 Sep 1997 09:01:18 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Mar 1998 11:50:19 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Guendelman",
"E. I.",
""
],
[
"Kaganovich",
"A. B.",
""
]
] | We show that it is possible to obtain inflation and also solve the cosmological constant problem. The theory is invariant under changes of the Lagrangian density $L$ to $L+const$. Then the constant part of a scalar field potential $V$ cannot be responsible for inflation. However, we show that inflation can be driven by... |
gr-qc/9607003 | Larry Ford | L.H. Ford and Thomas A. Roman | Restrictions on Negative Energy Density in Flat Spacetime | 17 pages, including two figures, uses epsf, minor revisions in the
Introduction, conclusions unchanged | Phys.Rev. D55 (1997) 2082-2089 | 10.1103/PhysRevD.55.2082 | TUTP-96-2 | gr-qc hep-th | null | In a previous paper, a bound on the negative energy density seen by an
arbitrary inertial observer was derived for the free massless, quantized scalar
field in four-dimensional Minkowski spacetime. This constraint has the form of
an uncertainty principle-type limitation on the magnitude and duration of the
negative e... | [
{
"created": "Mon, 1 Jul 1996 17:17:18 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jan 1997 22:48:00 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Ford",
"L. H.",
""
],
[
"Roman",
"Thomas A.",
""
]
] | In a previous paper, a bound on the negative energy density seen by an arbitrary inertial observer was derived for the free massless, quantized scalar field in four-dimensional Minkowski spacetime. This constraint has the form of an uncertainty principle-type limitation on the magnitude and duration of the negative ene... |
1310.5694 | Ayan Banerjee | Ayan Banerjee | Stability of charged thin-shell wormholes in (2 + 1) dimensions | 9 pages, 15 figures | International Journal of Theoretical Physics August 2013, Volume
52, Issue 8, pp 2943-2958 | 10.1007/s10773-013-1585-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct charged thin-shell wormholes in (2+1)-dimensions
applying the cut-and -paste technique implemented by Visser, from a BTZ black
hole which was discovered by Banados, Teitelboim and Zanelli, and the surface
stress are determined using the Darmois-Israel formalism at the wormhole
throat. We an... | [
{
"created": "Sun, 20 Oct 2013 19:39:44 GMT",
"version": "v1"
}
] | 2013-10-23 | [
[
"Banerjee",
"Ayan",
""
]
] | In this paper we construct charged thin-shell wormholes in (2+1)-dimensions applying the cut-and -paste technique implemented by Visser, from a BTZ black hole which was discovered by Banados, Teitelboim and Zanelli, and the surface stress are determined using the Darmois-Israel formalism at the wormhole throat. We anal... |
1212.4060 | Marc Geiller | Ernesto Frodden, Marc Geiller, Karim Noui, Alejandro Perez | Black Hole Entropy from complex Ashtekar variables | 5 pages. New point of view on the analytic continuation, which is now
made rigorous by analytically-continuing the SU(2) spins in addition to the
Barbero-Immirzi parameter | Europhys. Lett. 107 (2014) 10005 | 10.1209/0295-5075/107/10005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In loop quantum gravity, the number $N_\Gamma(A,\gamma)$ of microstates of a
black hole for a given discrete geometry $\Gamma$ depends on the so-called
Barbero-Immirzi parameter $\gamma$. Using a suitable analytic continuation of
$\gamma$ to complex values, we show that the number $N_\Gamma(A,\pm i)$ of
microstates b... | [
{
"created": "Mon, 17 Dec 2012 16:36:30 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Dec 2013 09:24:48 GMT",
"version": "v2"
}
] | 2014-07-08 | [
[
"Frodden",
"Ernesto",
""
],
[
"Geiller",
"Marc",
""
],
[
"Noui",
"Karim",
""
],
[
"Perez",
"Alejandro",
""
]
] | In loop quantum gravity, the number $N_\Gamma(A,\gamma)$ of microstates of a black hole for a given discrete geometry $\Gamma$ depends on the so-called Barbero-Immirzi parameter $\gamma$. Using a suitable analytic continuation of $\gamma$ to complex values, we show that the number $N_\Gamma(A,\pm i)$ of microstates beh... |
1402.2133 | Sunandan Gangopadhyay | Abhijit Dutta, Sunandan Gangopadhyay | Remnant mass and entropy of black holes and modified uncertainty
principle | Reference added, To appear in Gen.Rel.Grav | null | 10.1007/s10714-014-1747-6 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the thermodynamics of black holes using a generalized
uncertainty principle (GUP) with a correction term linear order in the momentum
uncertainty. The mass-temperature relation and heat capacity are calculated
from which critical and remnant masses are obtained. The results are exact and
are f... | [
{
"created": "Mon, 10 Feb 2014 13:03:53 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Apr 2014 09:03:16 GMT",
"version": "v2"
},
{
"created": "Thu, 1 May 2014 09:04:53 GMT",
"version": "v3"
}
] | 2015-06-18 | [
[
"Dutta",
"Abhijit",
""
],
[
"Gangopadhyay",
"Sunandan",
""
]
] | In this paper, we study the thermodynamics of black holes using a generalized uncertainty principle (GUP) with a correction term linear order in the momentum uncertainty. The mass-temperature relation and heat capacity are calculated from which critical and remnant masses are obtained. The results are exact and are fou... |
2404.06414 | Naoki Tsukamoto | Naoki Tsukamoto, Ryotaro Kase | Constraints on the black-hole charges of M87* and Sagittarius A* by
changing rates of photon spheres can be relaxed | 12 pages, 9 figures, minor correction, title changed, references
added | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Event Horizon Telescope (EHT) collaboration observed ring images called the
shadows of M87* and Sagittarius A* (Sgr A*), which are supermassive objects in
M87 and our galaxy, respectively, and their general relativistic
magnetohydrodynamic simulations of black holes imply that the observed rings
are formed by the gra... | [
{
"created": "Tue, 9 Apr 2024 16:03:42 GMT",
"version": "v1"
},
{
"created": "Tue, 28 May 2024 11:00:42 GMT",
"version": "v2"
}
] | 2024-05-29 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Kase",
"Ryotaro",
""
]
] | Event Horizon Telescope (EHT) collaboration observed ring images called the shadows of M87* and Sagittarius A* (Sgr A*), which are supermassive objects in M87 and our galaxy, respectively, and their general relativistic magnetohydrodynamic simulations of black holes imply that the observed rings are formed by the gravi... |
1911.05786 | Fabio Dahia | A. S. Lemos, G. C. Luna, E. Maciel, F. Dahia | Spectroscopic tests for short-range modifications of Newtonian and
post-Newtonian potentials | To appear in Classical and Quantum Gravity | null | 10.1088/1361-6382/ab561f | null | gr-qc physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are theoretical frameworks, such as the large extra dimension models,
which predict the strengthening of the gravitational field in short distances.
Here we obtain new empiric constraints for deviations of standard gravity in
the atomic length scale from analyses of recent and accurate data of hydrogen
spectros... | [
{
"created": "Wed, 13 Nov 2019 20:00:50 GMT",
"version": "v1"
}
] | 2019-11-15 | [
[
"Lemos",
"A. S.",
""
],
[
"Luna",
"G. C.",
""
],
[
"Maciel",
"E.",
""
],
[
"Dahia",
"F.",
""
]
] | There are theoretical frameworks, such as the large extra dimension models, which predict the strengthening of the gravitational field in short distances. Here we obtain new empiric constraints for deviations of standard gravity in the atomic length scale from analyses of recent and accurate data of hydrogen spectrosco... |
1705.07945 | Jose Mathew | Jose Mathew, Joseph P Johnson and S. Shankaranarayanan | Inflation with $f(R,\phi)$ in Jordan frame | 10 pages, 3 figures | General Relativity and Gravitation 50.7 (2018): 90 | 10.1007/s10714-018-2410-4 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an $f(R)$ action that is non-minimally coupled to a massive
scalar field. The model closely resembles scalar-tensor theory and by conformal
transformation can be transformed to Einstein frame. To avoid the ambiguity of
the frame dependence, we obtain an exact analytical solution in Jordan frame
and show t... | [
{
"created": "Mon, 22 May 2017 18:45:07 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Jul 2018 19:55:52 GMT",
"version": "v2"
}
] | 2018-07-17 | [
[
"Mathew",
"Jose",
""
],
[
"Johnson",
"Joseph P",
""
],
[
"Shankaranarayanan",
"S.",
""
]
] | We consider an $f(R)$ action that is non-minimally coupled to a massive scalar field. The model closely resembles scalar-tensor theory and by conformal transformation can be transformed to Einstein frame. To avoid the ambiguity of the frame dependence, we obtain an exact analytical solution in Jordan frame and show tha... |
2306.16746 | Josef Kluson | J. Kluson | Note About Canonical Formalism for Gravity with Dynamical Determinant of
Metric | 15 pages | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this short note we perform canonical analysis of the theory invariant
under restricted diffeomorphism so that the action contains kinetic term for
determinant of metric. We find corresponding Hamiltonian and determine
structure of constraints.
| [
{
"created": "Thu, 29 Jun 2023 07:42:40 GMT",
"version": "v1"
}
] | 2023-06-30 | [
[
"Kluson",
"J.",
""
]
] | In this short note we perform canonical analysis of the theory invariant under restricted diffeomorphism so that the action contains kinetic term for determinant of metric. We find corresponding Hamiltonian and determine structure of constraints. |
gr-qc/0103026 | Christopher Beetle | Abhay Ashtekar, Christopher Beetle, Jerzy Lewandowski | Mechanics of Rotating Isolated Horizons | 31 pages REVTeX, 1 eps figure; Minor typos corrected and a footnote
added | Phys.Rev. D64 (2001) 044016 | 10.1103/PhysRevD.64.044016 | null | gr-qc | null | Black hole mechanics was recently extended by replacing the more commonly
used event horizons in stationary space-times with isolated horizons in more
general space-times (which may admit radiation arbitrarily close to black
holes). However, so far the detailed analysis has been restricted to
non-rotating black holes... | [
{
"created": "Fri, 9 Mar 2001 02:44:41 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Apr 2001 18:07:07 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Beetle",
"Christopher",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | Black hole mechanics was recently extended by replacing the more commonly used event horizons in stationary space-times with isolated horizons in more general space-times (which may admit radiation arbitrarily close to black holes). However, so far the detailed analysis has been restricted to non-rotating black holes (... |
1803.10387 | Keigo Shibuya | Keigo Shibuya | Lorentzian positive mass theorem for spacetimes with distributional
curvature | 21 pages | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we prove Lorentzian positive mass theorem for spacetimes with
distributional curvature. To do so, we introduce distributional curvature and
generalized Arnowitt-Deser-Misner (ADM) momentum. As an application, we discuss
a junction of spacetimes.
| [
{
"created": "Wed, 28 Mar 2018 02:18:38 GMT",
"version": "v1"
}
] | 2018-04-02 | [
[
"Shibuya",
"Keigo",
""
]
] | In this paper, we prove Lorentzian positive mass theorem for spacetimes with distributional curvature. To do so, we introduce distributional curvature and generalized Arnowitt-Deser-Misner (ADM) momentum. As an application, we discuss a junction of spacetimes. |
1109.6832 | J. A. de Freitas Pacheco | Alain de Roany, Bertrand Chauvineau and J.A. de Freitas Pacheco | Visser's Massive Gravity Bimetric Theory Revisited | 10 pages - Accepted for publication in Physical Review D | null | 10.1103/PhysRevD.84.084043 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A massive gravity theory was proposed by Visser in the late nineties. This
theory, based on a backgroung metric $b_{\alpha \beta}$ and on an usual
dynamical metric $g_{\alpha \beta}$ has the advantage of being free of ghosts
as well as discontinuities present in other massive theories proposed in the
past. In the pre... | [
{
"created": "Fri, 30 Sep 2011 14:23:37 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"de Roany",
"Alain",
""
],
[
"Chauvineau",
"Bertrand",
""
],
[
"Pacheco",
"J. A. de Freitas",
""
]
] | A massive gravity theory was proposed by Visser in the late nineties. This theory, based on a backgroung metric $b_{\alpha \beta}$ and on an usual dynamical metric $g_{\alpha \beta}$ has the advantage of being free of ghosts as well as discontinuities present in other massive theories proposed in the past. In the prese... |
2111.09628 | Burkhard Kleihaus | Rustam Ibadov, Burkhard Kleihaus, Jutta Kunz, Sardor Murodov | Wormhole solutions with NUT charge in higher curvature theories | 10 pages, 2 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present wormholes with a Newman-Unti-Tamburino (NUT) charge that arise in
certain higher curvature theories, where a scalar field is coupled to a higher
curvature invariant. For the invariants we employ i) a Gauss-Bonnet term and
ii) a Chern-Simons term, which then act as source terms for the scalar field.
We map ... | [
{
"created": "Thu, 18 Nov 2021 11:13:41 GMT",
"version": "v1"
}
] | 2021-11-19 | [
[
"Ibadov",
"Rustam",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Murodov",
"Sardor",
""
]
] | We present wormholes with a Newman-Unti-Tamburino (NUT) charge that arise in certain higher curvature theories, where a scalar field is coupled to a higher curvature invariant. For the invariants we employ i) a Gauss-Bonnet term and ii) a Chern-Simons term, which then act as source terms for the scalar field. We map ou... |
gr-qc/0604099 | Rafael Porto A. | Rafael A. Porto, Ira Z. Rothstein | The Hyperfine Einstein-Infeld-Hoffmann Potential | 4 pages, 2 figures, RevTex | Phys.Rev.Lett. 97 (2006) 021101 | 10.1103/PhysRevLett.97.021101 | null | gr-qc astro-ph hep-ph hep-th | null | We use recently developed effective field theory techniques to calculate the
third order post-Newtonian correction to the spin-spin potential between two
spinning objects. This correction represents the first contribution to the
spin-spin interaction due to the non-linear nature of general relativity and
will play an... | [
{
"created": "Fri, 21 Apr 2006 21:10:04 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Porto",
"Rafael A.",
""
],
[
"Rothstein",
"Ira Z.",
""
]
] | We use recently developed effective field theory techniques to calculate the third order post-Newtonian correction to the spin-spin potential between two spinning objects. This correction represents the first contribution to the spin-spin interaction due to the non-linear nature of general relativity and will play an i... |
1412.7078 | Raul Vera | Borja Reina, Ra\"ul Vera | Hartle's model within the general theory of perturbative matchings: the
change in mass | 6 pages, no figures. To appear in the proceedings of the ERE2014 in
Journal of Physics: Conference Series | null | 10.1088/1742-6596/600/1/012013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hartle's model provides the most widely used analytic framework to describe
isolated compact bodies rotating slowly in equilibrium up to second order in
perturbations in the context of General Relativity. Apart from some explicit
assumptions, there are some implicit, like the "continuity" of the functions in
the pert... | [
{
"created": "Mon, 22 Dec 2014 18:24:09 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Reina",
"Borja",
""
],
[
"Vera",
"Raül",
""
]
] | Hartle's model provides the most widely used analytic framework to describe isolated compact bodies rotating slowly in equilibrium up to second order in perturbations in the context of General Relativity. Apart from some explicit assumptions, there are some implicit, like the "continuity" of the functions in the pertur... |
1701.06923 | Azam Izadi | Azam Izadi, Shadi Sajedi Shacker, Gonzalo J. Olmo, Robi Banerjee | Observational effects of varying speed of light in quadratic gravity
cosmological models | null | null | 10.1142/S0219887818500846 | IFIC/17-05 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study different manifestations of the speed of light in theories of
gravity where metric and connection are regarded as independent fields. We find
that for a generic gravity theory in a frame with locally vanishing affine
connection, the usual degeneracy between different manifestations of the speed
of light is b... | [
{
"created": "Mon, 23 Jan 2017 10:43:41 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jun 2017 14:52:48 GMT",
"version": "v2"
}
] | 2018-04-18 | [
[
"Izadi",
"Azam",
""
],
[
"Shacker",
"Shadi Sajedi",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Banerjee",
"Robi",
""
]
] | We study different manifestations of the speed of light in theories of gravity where metric and connection are regarded as independent fields. We find that for a generic gravity theory in a frame with locally vanishing affine connection, the usual degeneracy between different manifestations of the speed of light is bro... |
1305.6977 | Nikodem Poplawski | Nikodem Poplawski | Energy and momentum of the Universe | 6 pages | Class. Quantum Grav. 31, 065005 (2014) | 10.1088/0264-9381/31/6/065005 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Cartan-Sciama-Kibble theory of gravity naturally extends general
relativity to include quantum-mechanical, intrinsic angular momentum of matter
by equipping spacetime with torsion. Using the Einstein energy-momentum
pseudotensor for the gravitational field in this theory, we show that the
energy and mome... | [
{
"created": "Wed, 29 May 2013 23:58:16 GMT",
"version": "v1"
}
] | 2014-02-27 | [
[
"Poplawski",
"Nikodem",
""
]
] | The Einstein-Cartan-Sciama-Kibble theory of gravity naturally extends general relativity to include quantum-mechanical, intrinsic angular momentum of matter by equipping spacetime with torsion. Using the Einstein energy-momentum pseudotensor for the gravitational field in this theory, we show that the energy and moment... |
1204.3619 | Jonas Mureika | J. R. Mureika | Primordial Black Hole Evaporation and Spontaneous Dimensional Reduction | 20 pp, 1 figure; title changed and discussion significantly expanded;
to appear in Phys. Lett. B | Phys. Lett. B 716, 171-175 (2012) | 10.1016/j.physletb.2012.08.029 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several different approaches to quantum gravity suggest the effective
dimension of spacetime reduces from four to two near the Planck scale. In light
of such evidence, this letter re-examines the thermodynamics of primordial
black holes (PBHs) in specific lower-dimensional gravitational models. Unlike
in four dimensi... | [
{
"created": "Fri, 13 Apr 2012 21:12:08 GMT",
"version": "v1"
},
{
"created": "Wed, 16 May 2012 13:43:18 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Aug 2012 15:57:41 GMT",
"version": "v3"
}
] | 2012-08-30 | [
[
"Mureika",
"J. R.",
""
]
] | Several different approaches to quantum gravity suggest the effective dimension of spacetime reduces from four to two near the Planck scale. In light of such evidence, this letter re-examines the thermodynamics of primordial black holes (PBHs) in specific lower-dimensional gravitational models. Unlike in four dimension... |
1001.0306 | Jian-Yang Zhu | Kui Xiao and Jian-Yang Zhu | Thermodynamics properties of the dark energy in loop quantum cosmology | 7 pages, no figures, revised version | Int.J. Mod.Phys.D20:169-179,2011 | 10.1142/S0218271811018731 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Considering an arbitrary, varying equation of the state parameter, the
thermodynamic properties of the dark energy fluid in a semiclassical loop
quantum cosmology scenario, which we consider the inverse volume modification,
is studied. The equation of the state parameters are corrected as a
semiclassical one during c... | [
{
"created": "Sat, 2 Jan 2010 14:37:06 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jun 2010 15:42:49 GMT",
"version": "v2"
}
] | 2011-03-22 | [
[
"Xiao",
"Kui",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | Considering an arbitrary, varying equation of the state parameter, the thermodynamic properties of the dark energy fluid in a semiclassical loop quantum cosmology scenario, which we consider the inverse volume modification, is studied. The equation of the state parameters are corrected as a semiclassical one during con... |
2210.03443 | Telem Ibungochouba Singh | S. Christina, T. Ibungochouba Singh, I. Ablu Meitei | Modified Hawking temperatures of black holes in Lorentz violation theory | Submitted in Int. J. Geom. Methods Mod. Phys | null | 10.1142/S0219887823500500 | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, the tunneling of scalar particles near the event horizons of
Riemann space time, BTZ black hole and Schwarzschild-de Sitter black hole are
investigated by applying Hamilton-Jacobi equation with Lorentz violation theory
in curved space time. The modified Hamilton-Jacobi equation is derived from
Klein-Go... | [
{
"created": "Fri, 7 Oct 2022 10:27:15 GMT",
"version": "v1"
}
] | 2023-03-15 | [
[
"Christina",
"S.",
""
],
[
"Singh",
"T. Ibungochouba",
""
],
[
"Meitei",
"I. Ablu",
""
]
] | In this paper, the tunneling of scalar particles near the event horizons of Riemann space time, BTZ black hole and Schwarzschild-de Sitter black hole are investigated by applying Hamilton-Jacobi equation with Lorentz violation theory in curved space time. The modified Hamilton-Jacobi equation is derived from Klein-Gord... |
2208.00397 | Rakshit Vyas | Rakshit P. Vyas and Mihir J. Joshi | Implications of New Quantum Spin Perspective In Quantum Gravity | 13 pages | Phys Sci & Biophys J, 2023, 7(1): 000235 | 10.23880/psbj-16000235 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Consequences of new quantum spin perspective in quantum gravity are
far-reaching. Results of this novel perspective in loop quantum gravity, i.e.,
the modification of the equation of geometrical operators such as the area and
the volume operator are known. Using newly proposed formula from this
perspective, the magni... | [
{
"created": "Sun, 31 Jul 2022 08:58:50 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Aug 2022 09:04:29 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Dec 2022 12:33:57 GMT",
"version": "v3"
}
] | 2023-04-11 | [
[
"Vyas",
"Rakshit P.",
""
],
[
"Joshi",
"Mihir J.",
""
]
] | Consequences of new quantum spin perspective in quantum gravity are far-reaching. Results of this novel perspective in loop quantum gravity, i.e., the modification of the equation of geometrical operators such as the area and the volume operator are known. Using newly proposed formula from this perspective, the magnitu... |
gr-qc/9709060 | Henk van Elst | George F R Ellis, Henk van Elst | Deviation of geodesics in FLRW spacetime geometries | 17 pages, LaTeX 2.09, 3 *.eps figures, Contribution to the
forthcoming Engelbert Sch\"{u}cking Festschrift (Springer Verlag) | null | 10.1007/978-1-4612-1422-9_14 | null | gr-qc | null | The geodesic deviation equation (`GDE') provides an elegant tool to
investigate the timelike, null and spacelike structure of spacetime geometries.
Here we employ the GDE to review these structures within the
Friedmann--Lema\^{\i}tre--Robertson--Walker (`FLRW') models, where we assume
the sources to be given by a non... | [
{
"created": "Wed, 24 Sep 1997 10:18:05 GMT",
"version": "v1"
}
] | 2022-03-14 | [
[
"Ellis",
"George F R",
""
],
[
"van Elst",
"Henk",
""
]
] | The geodesic deviation equation (`GDE') provides an elegant tool to investigate the timelike, null and spacelike structure of spacetime geometries. Here we employ the GDE to review these structures within the Friedmann--Lema\^{\i}tre--Robertson--Walker (`FLRW') models, where we assume the sources to be given by a non-i... |
1210.3136 | Mahmood Roshan | Mahmood Roshan | Test particle motion in modified gravity theories | 15 pages | Phys. Rev. D 87, 044005 (2013) | 10.1103/PhysRevD.87.044005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the equations of motion of an electrically neutral test particle
for modified gravity theories in which the covariant divergence of the ordinary
matter energy-momentum tensor dose not vanish (i.e.
$\nabla_{\mu}T^{\mu\nu}\neq0$). In fact, we generalize the Mathisson-Papapetrou
equations by deriving a general... | [
{
"created": "Thu, 11 Oct 2012 06:20:41 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Feb 2013 09:43:54 GMT",
"version": "v2"
}
] | 2013-02-06 | [
[
"Roshan",
"Mahmood",
""
]
] | We derive the equations of motion of an electrically neutral test particle for modified gravity theories in which the covariant divergence of the ordinary matter energy-momentum tensor dose not vanish (i.e. $\nabla_{\mu}T^{\mu\nu}\neq0$). In fact, we generalize the Mathisson-Papapetrou equations by deriving a general f... |
1506.04946 | Emmanuele Battista | Emmanuele Battista, Giampiero Esposito, Simone Dell' Agnello, Jules
Simo | Quantum Effects on all Lagrangian Points and Prospects to Measure Them
in the Earth-Moon System | prepared for the AT1 (Extended Theories of Gravity and Quantum
Cosmology) session of the MG14 Conference, Rome, July 2015 | null | 10.1142/9789813226609_0102 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The one-loop long distance quantum corrections to the Newtonian potential
imply tiny but observable effects in the restricted three-body problem of
celestial mechanics, i.e., both at the Lagrangian points of stable equilibrium
and at those of unstable equilibrium the Newtonian values of planetoid's
coordinates are ch... | [
{
"created": "Tue, 16 Jun 2015 12:41:02 GMT",
"version": "v1"
}
] | 2018-05-07 | [
[
"Battista",
"Emmanuele",
""
],
[
"Esposito",
"Giampiero",
""
],
[
"Agnello",
"Simone Dell'",
""
],
[
"Simo",
"Jules",
""
]
] | The one-loop long distance quantum corrections to the Newtonian potential imply tiny but observable effects in the restricted three-body problem of celestial mechanics, i.e., both at the Lagrangian points of stable equilibrium and at those of unstable equilibrium the Newtonian values of planetoid's coordinates are chan... |
2407.04464 | Kai Schmitz | Nina Cordes, Andrea Mitridate, Kai Schmitz, Tobias Schr\"oder, Kim
Wassner | On the overlap reduction function of pulsar timing array searches for
gravitational waves in modified gravity | 13 pages, 4 figures, 0 divergences | null | null | MS-TP-24-13, DESY-24-098 | gr-qc astro-ph.CO astro-ph.HE hep-ph | http://creativecommons.org/licenses/by/4.0/ | Pulsar Timing Array (PTA) searches for gravitational waves (GWs) aim to
detect a characteristic correlation pattern in the timing residuals of galactic
millisecond pulsars. This pattern is described by the PTA overlap reduction
function (ORF) \Gamma_ab(\xi_ab), which is known as the Hellings--Downs (HD)
curve in gene... | [
{
"created": "Fri, 5 Jul 2024 12:21:04 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Cordes",
"Nina",
""
],
[
"Mitridate",
"Andrea",
""
],
[
"Schmitz",
"Kai",
""
],
[
"Schröder",
"Tobias",
""
],
[
"Wassner",
"Kim",
""
]
] | Pulsar Timing Array (PTA) searches for gravitational waves (GWs) aim to detect a characteristic correlation pattern in the timing residuals of galactic millisecond pulsars. This pattern is described by the PTA overlap reduction function (ORF) \Gamma_ab(\xi_ab), which is known as the Hellings--Downs (HD) curve in genera... |
2205.03003 | Miguel Cruz | Gilberto Aguilar-P\'erez, Ana A. Avilez-L\'opez and Miguel Cruz | Qualitative analysis for viscous cosmologies in a non linear regime of
the Israel-Stewart formalism | Improved version, 18 pages, 3 figures, references added | JCAP 11, 016 (2022) | 10.1088/1475-7516/2022/11/016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the dynamical properties of a cosmological model that includes
viscous effects in the dark matter sector of the fluid equations in a flat
Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime. The bulk viscous effects
are described by a non linear extension of the full Israel-Stewart model. We
allow the int... | [
{
"created": "Fri, 6 May 2022 04:08:16 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Oct 2022 07:20:57 GMT",
"version": "v2"
}
] | 2022-11-14 | [
[
"Aguilar-Pérez",
"Gilberto",
""
],
[
"Avilez-López",
"Ana A.",
""
],
[
"Cruz",
"Miguel",
""
]
] | We explore the dynamical properties of a cosmological model that includes viscous effects in the dark matter sector of the fluid equations in a flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime. The bulk viscous effects are described by a non linear extension of the full Israel-Stewart model. We allow the inter... |
1401.7073 | Wen-Yu Wen | Wen-Yu Wen | Area spectrum of extremal black holes with warped AdS near-horizon
geometry | 6 pages, revtex4, references added, typo fixed | Mod.Phys.Lett. A29 (2014) 1450109 | 10.1142/S0217732314501090 | CYCU-HEP-14-03 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we provide an alternative method to study the area spectrum
of certain classes of extremal black holes which have near-horizon geometry as
warped AdS. We argue that previous methods which are based on the existence of
quasinormal modes may not be applicable in the extremal limit. The topology
differen... | [
{
"created": "Tue, 28 Jan 2014 03:32:45 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Feb 2014 04:26:03 GMT",
"version": "v2"
}
] | 2014-11-25 | [
[
"Wen",
"Wen-Yu",
""
]
] | In this letter, we provide an alternative method to study the area spectrum of certain classes of extremal black holes which have near-horizon geometry as warped AdS. We argue that previous methods which are based on the existence of quasinormal modes may not be applicable in the extremal limit. The topology difference... |
gr-qc/0703142 | Sashideep Gutti | Sashideep Gutti, T.P. Singh | Particle creation in (2+1) circular dust collapse | 15 pages, additional material added in Introduction and Discussion,
conclusions unchanged, to appear in Physical Review D | Phys.Rev.D76:064026,2007 | 10.1103/PhysRevD.76.064026 | null | gr-qc hep-th | null | We investigate the quantum particle creation during the circularly symmetric
collapse of a 2+1 dust cloud, for the cases when the cosmological constant is
either zero or negative. We derive the Ford-Parker formula for the 2+1 case,
which can be used to compute the radiated quantum flux in the geometric optics
approxi... | [
{
"created": "Wed, 28 Mar 2007 20:21:12 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Apr 2007 11:15:39 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Aug 2007 16:05:34 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Gutti",
"Sashideep",
""
],
[
"Singh",
"T. P.",
""
]
] | We investigate the quantum particle creation during the circularly symmetric collapse of a 2+1 dust cloud, for the cases when the cosmological constant is either zero or negative. We derive the Ford-Parker formula for the 2+1 case, which can be used to compute the radiated quantum flux in the geometric optics approxima... |
1912.12732 | Lorenzo Asprea | Lorenzo Asprea, Angelo Bassi, Hendrik Ulbricht and Giulio Gasbarri | On the decoherence effect of a stochastic gravitational perturbation on
scalar matter and the possibility of its interferometric detection | The paper now includes also the analysis for the energy eigenbasis
decoherence | Phys. Rev. Lett. 126, 200403 (2021) | 10.1103/PhysRevLett.126.200403 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a general master equation for the quantum dynamics of a scalar
bosonic particle interacting with an external weak and stochastic gravitational
field. The dynamics predicts decoherence in position as well as in momentum. We
show how the master equation reproduces the results present in the literature
by tak... | [
{
"created": "Sun, 29 Dec 2019 21:08:44 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Apr 2020 09:54:27 GMT",
"version": "v2"
}
] | 2021-05-26 | [
[
"Asprea",
"Lorenzo",
""
],
[
"Bassi",
"Angelo",
""
],
[
"Ulbricht",
"Hendrik",
""
],
[
"Gasbarri",
"Giulio",
""
]
] | We present a general master equation for the quantum dynamics of a scalar bosonic particle interacting with an external weak and stochastic gravitational field. The dynamics predicts decoherence in position as well as in momentum. We show how the master equation reproduces the results present in the literature by takin... |
1510.04990 | Abhay Ashtekar | Abhay Ashtekar, B\'eatrice Bonga and Aruna Kesavan | Gravitational waves from isolated systems: Surprising consequences of a
positive cosmological constant | 5 pages, 1 Figure. Small revision in the Introduction on page 1 and
Summary/Outlook on page 4 revised; some references added. To appear in PRL | Phys. Rev. Lett. 116, 051101 (2016) | 10.1103/PhysRevLett.116.051101 | IGC-15/10-2 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a deep tension between the well-developed theory of gravitational
waves from isolated systems and the presence of a positive cosmological
constant $\Lambda$, however tiny. In particular, even the post-Newtonian
quadrupole formula, derived by Einstein in 1918, has not been generalized to
include a positive $\... | [
{
"created": "Fri, 16 Oct 2015 19:15:07 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Dec 2015 19:48:41 GMT",
"version": "v2"
}
] | 2016-02-10 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Bonga",
"Béatrice",
""
],
[
"Kesavan",
"Aruna",
""
]
] | There is a deep tension between the well-developed theory of gravitational waves from isolated systems and the presence of a positive cosmological constant $\Lambda$, however tiny. In particular, even the post-Newtonian quadrupole formula, derived by Einstein in 1918, has not been generalized to include a positive $\La... |
1903.04303 | Muhammad Sharif | M. Sharif and Faisal Javed | Collapse and Expansion of Scalar Thin-Shell for a Class of Black Holes | 23 pages, 10 figures | Int. J. Mod. Phys. D 28(2019)1950046 | 10.1142/S0218271819500469 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates the dynamics of thin-shell in the presence of perfect
fluid as well as the scalar field. We formulate the equations of motion using
Israel thin-shell formalism by taking the interior and exterior regions of
Schwarzschild, Kerr as well as Kerr-Newmann black hole. We find numerical
solutions of ... | [
{
"created": "Fri, 8 Mar 2019 04:17:12 GMT",
"version": "v1"
}
] | 2019-03-20 | [
[
"Sharif",
"M.",
""
],
[
"Javed",
"Faisal",
""
]
] | This paper investigates the dynamics of thin-shell in the presence of perfect fluid as well as the scalar field. We formulate the equations of motion using Israel thin-shell formalism by taking the interior and exterior regions of Schwarzschild, Kerr as well as Kerr-Newmann black hole. We find numerical solutions of eq... |
1810.03438 | Konstantinos Dimopoulos | Konstantinos Dimopoulos | Steep Eternal Inflation and the Swampland | 8 pages, added some text and references | Phys. Rev. D 98, 123516 (2018) | 10.1103/PhysRevD.98.123516 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I investigate whether eternal inflation is possible when the inflaton
originally travels upslope the scalar potential and inevitably reaches a
turn-around point where its classical kinetic energy momentarily vanishes. This
behaviour occurs regardless of the steepness of the potential slope. Such steep
eternal inflati... | [
{
"created": "Wed, 19 Sep 2018 06:05:32 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2018 10:29:15 GMT",
"version": "v2"
}
] | 2018-12-26 | [
[
"Dimopoulos",
"Konstantinos",
""
]
] | I investigate whether eternal inflation is possible when the inflaton originally travels upslope the scalar potential and inevitably reaches a turn-around point where its classical kinetic energy momentarily vanishes. This behaviour occurs regardless of the steepness of the potential slope. Such steep eternal inflation... |
1401.4573 | Yorgo Senikoglu | Metin Arik and Yorgo \c{S}eniko\u{g}lu | Black Hole solutions in a cosmological spacetime background | 4 pages | Mod. Phys. Lett. A, Vol. 29, No. 28 (2014) 1450142 | 10.1142/S0217732314501429 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose and analyze a new metric that has two conformal factors a(t) and
b(t) that combine the expansion of the universe and its effects on the spatial
and temporal part of the Schwarzschild metric in isotropic coordinates. We
present the solutions, their descriptions and we comment on their shortcomings.
In the s... | [
{
"created": "Sat, 18 Jan 2014 17:50:20 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Mar 2014 09:56:03 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Apr 2014 11:14:13 GMT",
"version": "v3"
},
{
"created": "Sun, 27 Apr 2014 20:28:22 GMT",
"version": "v4"
},
{
"cr... | 2014-09-10 | [
[
"Arik",
"Metin",
""
],
[
"Şenikoğlu",
"Yorgo",
""
]
] | We propose and analyze a new metric that has two conformal factors a(t) and b(t) that combine the expansion of the universe and its effects on the spatial and temporal part of the Schwarzschild metric in isotropic coordinates. We present the solutions, their descriptions and we comment on their shortcomings. In the spa... |
1802.07066 | Joan Josep Ferrando | Joan Josep Ferrando and Juan Antonio S\'aez | Intrinsic, deductive, explicit, and algorithmic characterization of the
Szekeres-Szafron solutions | 12 pages; Accepted in Phys. Rev. D | Phys. Rev D 97 044026 (2018) | 10.1103/PhysRevD.97.044026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We write the known invariant definition of the Szekeres-Szafron family of
solutions in an intrinsic, deductive, explicit and algorithmic form. We also
intrinsically characterize the two commonly considered subfamilies, and analyze
other subclasses, also defined by first-order differential conditions.
Furthermore, we ... | [
{
"created": "Tue, 20 Feb 2018 11:34:47 GMT",
"version": "v1"
}
] | 2019-10-16 | [
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | We write the known invariant definition of the Szekeres-Szafron family of solutions in an intrinsic, deductive, explicit and algorithmic form. We also intrinsically characterize the two commonly considered subfamilies, and analyze other subclasses, also defined by first-order differential conditions. Furthermore, we pr... |
0806.2144 | Don N. Page | Don N. Page | Nonvanishing Local Scalar Invariants even in VSI Spacetimes with all
Polynomial Curvature Scalar Invariants Vanishing | 9 pages, LaTeX, proofread version accepted 2009 January 14 for
publication in Classical and Quantum Gravity | Class.Quant.Grav.26:055016,2009 | 10.1088/0264-9381/26/5/055016 | Alberta-Thy-15-08 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | VSI (`vanishing scalar invariant') spacetimes have zero values for all total
scalar contractions of all polynomials in the Riemann tensor and its covariant
derivatives. However, there are other ways of concocting local scalar
invariants (nonpolynomial) from the Riemann tensor that need not vanish even in
VSI spacetim... | [
{
"created": "Thu, 12 Jun 2008 23:41:13 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jul 2008 23:18:20 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Jul 2008 23:18:08 GMT",
"version": "v3"
},
{
"created": "Thu, 5 Feb 2009 04:00:50 GMT",
"version": "v4"
}
] | 2009-02-20 | [
[
"Page",
"Don N.",
""
]
] | VSI (`vanishing scalar invariant') spacetimes have zero values for all total scalar contractions of all polynomials in the Riemann tensor and its covariant derivatives. However, there are other ways of concocting local scalar invariants (nonpolynomial) from the Riemann tensor that need not vanish even in VSI spacetimes... |
2302.05922 | Etera R. Livine | Eugenio Bianchi, Etera R. Livine | Loop Quantum Gravity and Quantum Information | 17 pages, Invited chapter for the "Handbook of Quantum Gravity" (Eds.
C. Bambi, L. Modesto and I.L. Shapiro, Springer Singapore, expected in 2023) | In: Bambi, C., Modesto, L., Shapiro, I. (eds) Handbook of Quantum
Gravity. Springer, Singapore (2023) | 10.1007/978-981-19-3079-9_108-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize recent developments at the interface of quantum gravity and
quantum information, and discuss applications to the quantum geometry of space
in loop quantum gravity. In particular, we describe the notions of link
entanglement, intertwiner entanglement, and boundary spin entanglement in a
spin-network state... | [
{
"created": "Sun, 12 Feb 2023 14:29:25 GMT",
"version": "v1"
}
] | 2023-08-23 | [
[
"Bianchi",
"Eugenio",
""
],
[
"Livine",
"Etera R.",
""
]
] | We summarize recent developments at the interface of quantum gravity and quantum information, and discuss applications to the quantum geometry of space in loop quantum gravity. In particular, we describe the notions of link entanglement, intertwiner entanglement, and boundary spin entanglement in a spin-network state. ... |
1106.3412 | Peter Wolf | Peter Wolf, Luc Blanchet, Christian J. Bord\'e, Serge Reynaud,
Christophe Salomon and Claude Cohen-Tannoudji | Testing the Gravitational Redshift with Atomic Gravimeters? | Contribution to the proceedings of the joint European Time and
Frequency Forum and IEEE Frequency Control Symposium, 2011. Summary of the
extensive paper arXiv:1012.1194, Class. Quant. Grav. 28, 145017, (2011) | European Time and Frequency Forum (IEEE, 2011) p.1012-1016 | 10.1109/FCS.2011.5977899 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Atom interferometers allow the measurement of the acceleration of freely
falling atoms with respect to an experimental platform at rest on Earth's
surface. Such experiments have been used to test the universality of free fall
by comparing the acceleration of the atoms to that of a classical freely
falling object. In ... | [
{
"created": "Fri, 17 Jun 2011 08:28:35 GMT",
"version": "v1"
}
] | 2016-11-17 | [
[
"Wolf",
"Peter",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Bordé",
"Christian J.",
""
],
[
"Reynaud",
"Serge",
""
],
[
"Salomon",
"Christophe",
""
],
[
"Cohen-Tannoudji",
"Claude",
""
]
] | Atom interferometers allow the measurement of the acceleration of freely falling atoms with respect to an experimental platform at rest on Earth's surface. Such experiments have been used to test the universality of free fall by comparing the acceleration of the atoms to that of a classical freely falling object. In a ... |
gr-qc/0309001 | Piotr Chrusciel | Piotr T. Chrusciel, Erwann Delay | Manifold structures for sets of solutions of the general relativistic
constraint equations | latex2e, 32 A4 pages, minor corrections | null | 10.1016/j.geomphys.2003.12.002 | null | gr-qc | null | We construct manifold structures on various sets of solutions of the general
relativistic initial data sets.
| [
{
"created": "Sat, 30 Aug 2003 07:54:20 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Jan 2004 13:50:50 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Chrusciel",
"Piotr T.",
""
],
[
"Delay",
"Erwann",
""
]
] | We construct manifold structures on various sets of solutions of the general relativistic initial data sets. |
1811.05227 | Orlando Luongo | Orlando Luongo, Marco Muccino, Hernando Quevedo | Kinematic and statistical inconsistencies of
Ho$\check{\textrm{r}}$ava-Lifshitz cosmology | 9 pages, 4 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the validity of a \emph{minimal} cosmological model derived
from the renormalizable Ho$\check{\textrm{r}}$ava action at low redshift scales
by using different cosmological and statistical tests. Assuming pure attractive
gravity, i.e., $\lambda>1/3$ in the Ho$\check{\textrm{r}}$ava action, we
compare th... | [
{
"created": "Tue, 13 Nov 2018 11:37:53 GMT",
"version": "v1"
}
] | 2018-11-14 | [
[
"Luongo",
"Orlando",
""
],
[
"Muccino",
"Marco",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We investigate the validity of a \emph{minimal} cosmological model derived from the renormalizable Ho$\check{\textrm{r}}$ava action at low redshift scales by using different cosmological and statistical tests. Assuming pure attractive gravity, i.e., $\lambda>1/3$ in the Ho$\check{\textrm{r}}$ava action, we compare the ... |
2202.10440 | \'Alvaro Parra L\'opez | Natalia S\'anchez-Kuntz, \'Alvaro Parra-L\'opez, Mireia
Tolosa-Sime\'on, Tobias Haas, Stefan Floerchinger | Scalar quantum fields in cosmologies with 2+1 spacetime dimensions | 17 pages, 6 figures | Phys. Rev. D 105, 105020 (2022) | 10.1103/PhysRevD.105.105020 | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the possibility to use Bose-Einstein condensates as quantum
simulators for spacetime curvature, we study a massless relativistic scalar
quantum field in spatially curved Friedmann-Lema\^itre-Robertson-Walker
universes with $d=2+1$ spacetime dimensions. In particular, we investigate
particle production ca... | [
{
"created": "Mon, 21 Feb 2022 18:53:32 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Feb 2022 15:58:27 GMT",
"version": "v2"
}
] | 2022-06-22 | [
[
"Sánchez-Kuntz",
"Natalia",
""
],
[
"Parra-López",
"Álvaro",
""
],
[
"Tolosa-Simeón",
"Mireia",
""
],
[
"Haas",
"Tobias",
""
],
[
"Floerchinger",
"Stefan",
""
]
] | Motivated by the possibility to use Bose-Einstein condensates as quantum simulators for spacetime curvature, we study a massless relativistic scalar quantum field in spatially curved Friedmann-Lema\^itre-Robertson-Walker universes with $d=2+1$ spacetime dimensions. In particular, we investigate particle production caus... |
gr-qc/9511015 | Maria Guimaraes | M. E. X. Guimar\~aes | Cosmic String in Scalar-Tensor Gravity | 15 pages, LATEX, no figures | null | null | GRC 95/11/01 | gr-qc hep-th | null | The gravitational properties of a local cosmic string in the framework of
scalar-tensor gravity are examined. We find the metric in the weak-field
approximation and we show that, contrary to the General Relativity case, the
cosmic string in scalar-tensor gravitation exerces a force on non-relativistic,
neutral test p... | [
{
"created": "Fri, 3 Nov 1995 14:49:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Guimarães",
"M. E. X.",
""
]
] | The gravitational properties of a local cosmic string in the framework of scalar-tensor gravity are examined. We find the metric in the weak-field approximation and we show that, contrary to the General Relativity case, the cosmic string in scalar-tensor gravitation exerces a force on non-relativistic, neutral test par... |
1709.09715 | Satyanad Kichenassamy | James Isenberg and Satyanad Kichenassamy | Asymptotic Behavior in Polarized {\bf T}$^2$-symmetric Vacuum Spacetimes | null | Journal of Mathematical Physics, vol. 40, no. 1 (January 1999)
340--352 | 10.1063/1.532775 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use Fuchsian Reduction to study the behavior near the singularity of a
class of solutions of Einstein's vacuum equations. These solutions admit two
commuting spacelike Killing fields like the Gowdy spacetimes, but their twist
does not vanish. The spacetimes are also polarized in the sense that one of the
`gravitat... | [
{
"created": "Wed, 27 Sep 2017 19:53:55 GMT",
"version": "v1"
}
] | 2017-09-29 | [
[
"Isenberg",
"James",
""
],
[
"Kichenassamy",
"Satyanad",
""
]
] | We use Fuchsian Reduction to study the behavior near the singularity of a class of solutions of Einstein's vacuum equations. These solutions admit two commuting spacelike Killing fields like the Gowdy spacetimes, but their twist does not vanish. The spacetimes are also polarized in the sense that one of the `gravitatio... |
1808.05831 | Magdalena Zych | Magdalena Zych, {\L}ukasz Rudnicki, and Igor Pikovski | Gravitational mass of composite systems | To appear in Phys. Rev. D (accepted version; 7 pages, 1 figure) | Phys. Rev. D 99, 104029 (2019) | 10.1103/PhysRevD.99.104029 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The equivalence principle in combination with the special relativistic
equivalence between mass and energy, $E=mc^2$, is one of the cornerstones of
general relativity. However, for composite systems a long-standing result in
general relativity asserts that the passive gravitational mass is not simply
equal to the tot... | [
{
"created": "Fri, 17 Aug 2018 11:18:46 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Apr 2019 00:58:34 GMT",
"version": "v2"
}
] | 2019-05-22 | [
[
"Zych",
"Magdalena",
""
],
[
"Rudnicki",
"Łukasz",
""
],
[
"Pikovski",
"Igor",
""
]
] | The equivalence principle in combination with the special relativistic equivalence between mass and energy, $E=mc^2$, is one of the cornerstones of general relativity. However, for composite systems a long-standing result in general relativity asserts that the passive gravitational mass is not simply equal to the total... |
gr-qc/9909039 | Thomas A. Larsson | T. A. Larsson | The diffeomorphism algebra approach to quantum gravity | 14 pages, LaTex | null | null | null | gr-qc | null | The representation theory of non-centrally extended Lie algebras of Noether
symmetries, including spacetime diffeomorphisms and reparametrizations of the
observer's trajectory, has recently been developped. It naturally solves some
long-standing problems in quantum gravity, e.g. the role of diffeomorphisms and
the ca... | [
{
"created": "Mon, 13 Sep 1999 15:51:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Larsson",
"T. A.",
""
]
] | The representation theory of non-centrally extended Lie algebras of Noether symmetries, including spacetime diffeomorphisms and reparametrizations of the observer's trajectory, has recently been developped. It naturally solves some long-standing problems in quantum gravity, e.g. the role of diffeomorphisms and the caus... |
gr-qc/0505098 | Franklin Felber | F. S. Felber | Weak 'Antigravity' Fields in General Relativity | 5 pages, 3 figures, 1 table. Updates include: (1) Large Hadron
Collider off-line experiment designed to test relativistic gravity; (2)
demonstration that weak 'antigravity' fields correspond with new exact
solutions calculated from an exact metric first derived by Hartle, Thorne,
and Price | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the weak-field approximation of general relativity, new exact
solutions are derived for the gravitational field of a mass moving with
arbitrary velocity and acceleration. A mass having a constant velocity greater
than 3^-1/2 times the speed of light gravitationally repels other masses at
rest within a narrow c... | [
{
"created": "Thu, 19 May 2005 17:37:34 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jun 2005 21:34:43 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Feb 2009 02:23:43 GMT",
"version": "v3"
}
] | 2009-02-10 | [
[
"Felber",
"F. S.",
""
]
] | Within the weak-field approximation of general relativity, new exact solutions are derived for the gravitational field of a mass moving with arbitrary velocity and acceleration. A mass having a constant velocity greater than 3^-1/2 times the speed of light gravitationally repels other masses at rest within a narrow con... |
1007.1312 | Rafael Porto | Rafael A. Porto, Andreas Ross and Ira Z. Rothstein | Spin induced multipole moments for the gravitational wave flux from
binary inspirals to third Post-Newtonian order | 35 pages, 7 figures. Published version | JCAP 1103:009,2011 | 10.1088/1475-7516/2011/03/009 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using effective field theory techniques we calculate the source multipole
moments needed to obtain the spin contributions to the power radiated in
gravitational waves from inspiralling compact binaries to third Post-Newtonian
order (3PN). The multipoles depend linearly and quadratically on the spins and
include both ... | [
{
"created": "Thu, 8 Jul 2010 08:38:02 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Mar 2011 19:21:02 GMT",
"version": "v2"
}
] | 2011-03-30 | [
[
"Porto",
"Rafael A.",
""
],
[
"Ross",
"Andreas",
""
],
[
"Rothstein",
"Ira Z.",
""
]
] | Using effective field theory techniques we calculate the source multipole moments needed to obtain the spin contributions to the power radiated in gravitational waves from inspiralling compact binaries to third Post-Newtonian order (3PN). The multipoles depend linearly and quadratically on the spins and include both sp... |
1903.06612 | Xi-Long Fan | Kai Liao, Marek Biesiada, Xi-Long Fan | The wave nature of continuous gravitational waves from microlensing | Accepted for publication in The Astrophysical Journal | 2019, ApJ, 875, 139 | 10.3847/1538-4357/ab1087 | LIGO-G1802118,LIGO-P1800330 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave predicted by General Relativity is the transverse wave of
spatial strain. Several gravitational waveform signals from binary black holes
and from a binary neutron star system accompanied by electromagnetic
counterparts have been recorded by advanced LIGO and advanced Virgo. In analogy
to light, the... | [
{
"created": "Fri, 15 Mar 2019 15:52:43 GMT",
"version": "v1"
}
] | 2019-05-02 | [
[
"Liao",
"Kai",
""
],
[
"Biesiada",
"Marek",
""
],
[
"Fan",
"Xi-Long",
""
]
] | Gravitational wave predicted by General Relativity is the transverse wave of spatial strain. Several gravitational waveform signals from binary black holes and from a binary neutron star system accompanied by electromagnetic counterparts have been recorded by advanced LIGO and advanced Virgo. In analogy to light, the s... |
gr-qc/9409037 | Fay Dowker | Fay Dowker, Adrian Kent | Properties of Consistent Histories | 8 pages, TeX with Harvmac. Replaced with published version which
contains fewer technical details and more discussion of physical
implications. Title Corrected | Phys.Rev.Lett. 75 (1995) 3038-3041 | 10.1103/PhysRevLett.75.3038 | null | gr-qc hep-th quant-ph | null | We describe some properties of consistent sets of histories in the
Gell-Mann--Hartle formalism, and give an example to illustrate that one cannot
recover the standard predictions, retrodictions and inferences of
quasiclassical physics using the criterion of consistency alone.
| [
{
"created": "Sat, 17 Sep 1994 23:23:58 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Sep 1994 05:47:57 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Jan 1996 00:36:30 GMT",
"version": "v3"
},
{
"created": "Tue, 30 Jan 1996 04:35:41 GMT",
"version": "v4"
}
] | 2018-07-17 | [
[
"Dowker",
"Fay",
""
],
[
"Kent",
"Adrian",
""
]
] | We describe some properties of consistent sets of histories in the Gell-Mann--Hartle formalism, and give an example to illustrate that one cannot recover the standard predictions, retrodictions and inferences of quasiclassical physics using the criterion of consistency alone. |
1009.1839 | H Mohseni Sadjadi | H. Mohseni Sadjadi | On thermodynamics second law in the modified Gauss Bonnet gravity | 9pages, typos corrected, references added | Phys.Scripta 05:055006,2011 | 10.1088/0031-8949/83/05/055006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The second law and the generalized second law of thermodynamics in cosmology
in the framework of the modified Gauss-Bonnet theory of gravity are
investigated. The conditions upon which these laws hold are derived and
discussed.
| [
{
"created": "Thu, 9 Sep 2010 18:07:10 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Mar 2011 19:17:35 GMT",
"version": "v2"
}
] | 2011-05-27 | [
[
"Sadjadi",
"H. Mohseni",
""
]
] | The second law and the generalized second law of thermodynamics in cosmology in the framework of the modified Gauss-Bonnet theory of gravity are investigated. The conditions upon which these laws hold are derived and discussed. |
1409.7888 | Jose Antonio Font | Alejandro Torres, Antonio Marquina, Jos\'e A. Font, and Jos\'e M.
Ib\'a\~nez (University of Valencia) | Total-variation-based methods for gravitational wave denoising | 14 pages, 12 figures, to appear on Physical Review D | null | 10.1103/PhysRevD.90.084029 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe new methods for denoising and detection of gravitational waves
embedded in additive Gaussian noise. The methods are based on Total Variation
denoising algorithms. These algorithms, which do not need any a priori
information about the signals, have been originally developed and fully tested
in the context ... | [
{
"created": "Sun, 28 Sep 2014 10:14:34 GMT",
"version": "v1"
}
] | 2016-08-10 | [
[
"Torres",
"Alejandro",
"",
"University of Valencia"
],
[
"Marquina",
"Antonio",
"",
"University of Valencia"
],
[
"Font",
"José A.",
"",
"University of Valencia"
],
[
"Ibáñez",
"José M.",
"",
"University of Valencia"
]
] | We describe new methods for denoising and detection of gravitational waves embedded in additive Gaussian noise. The methods are based on Total Variation denoising algorithms. These algorithms, which do not need any a priori information about the signals, have been originally developed and fully tested in the context of... |
gr-qc/0412108 | Mikolaj Korzynski | M. Korzynski, J. Lewandowski, T. Pawlowski | Mechanics of multidimensional isolated horizons | 25 pages, 4 figures (eps), last sections revised, acknowledgements
and a section about the gauge invariance of introduced quantities added;
typos corrected, footnote 4 on page 9 added | Class.Quant.Grav. 22 (2005) 2001-2016 | 10.1088/0264-9381/22/11/006 | null | gr-qc hep-th | null | Recently a multidimensional generalization of Isolated Horizon framework has
been proposed by Lewandowski and Pawlowski (gr-qc/0410146). Therein the
geometric description was easily generalized to higher dimensions and the
structure of the constraints induced by the Einstein equations was analyzed. In
particular, the... | [
{
"created": "Tue, 21 Dec 2004 18:07:24 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jan 2005 14:38:16 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Mar 2005 15:54:10 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Korzynski",
"M.",
""
],
[
"Lewandowski",
"J.",
""
],
[
"Pawlowski",
"T.",
""
]
] | Recently a multidimensional generalization of Isolated Horizon framework has been proposed by Lewandowski and Pawlowski (gr-qc/0410146). Therein the geometric description was easily generalized to higher dimensions and the structure of the constraints induced by the Einstein equations was analyzed. In particular, the g... |
2101.06544 | Jean-Philippe Nicolas | Armand Coudray, Jean-Philippe Nicolas | Geometry of Vaidya spacetimes | 19 pages, 4 figures | null | 10.1007/s10714-021-02839-7 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the geometrical structure of Vaidya's spacetime in the case of
a white hole with decreasing mass, stabilising to a black hole in finite or
infinite time or evaporating completely. Our approach relies on a detailed
analysis of the ordinary differential equation describing the incoming
principal null geo... | [
{
"created": "Sat, 16 Jan 2021 23:00:46 GMT",
"version": "v1"
}
] | 2021-08-11 | [
[
"Coudray",
"Armand",
""
],
[
"Nicolas",
"Jean-Philippe",
""
]
] | We investigate the geometrical structure of Vaidya's spacetime in the case of a white hole with decreasing mass, stabilising to a black hole in finite or infinite time or evaporating completely. Our approach relies on a detailed analysis of the ordinary differential equation describing the incoming principal null geode... |
2405.12198 | Hryhorii Ovcharenko | H.V.Ovcharenko, O.B.Zaslavskii | Near-horizon properties of trajectories with finite force relevant for
Ba\~{n}ados-Silk-West effect | 24 pages | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to the Banados-SIlk-West (BSW) effect, two particles moving towards
a black hole, can collide near the horizon with an unbounded energy in the
center of mass frame. This requires one of particles to have fine-tuned
parameters in such a way that the time component of generalized momentum is
zero $X=0$. Thus ... | [
{
"created": "Mon, 20 May 2024 17:33:36 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Ovcharenko",
"H. V.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | According to the Banados-SIlk-West (BSW) effect, two particles moving towards a black hole, can collide near the horizon with an unbounded energy in the center of mass frame. This requires one of particles to have fine-tuned parameters in such a way that the time component of generalized momentum is zero $X=0$. Thus th... |
2106.09052 | Shahar Hod | Shahar Hod | The quantum mass gap of extremal black holes | 5 pages | Physics Letters B 819, 136425 (2021) | 10.1016/j.physletb.2021.136425 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Using sophisticated string theory calculations, Maldacena and Susskind have
intriguingly shown that near-extremal black holes are characterized by a {\it
finite} mass gap above the corresponding zero-temperature (extremal) black-hole
configuration. In the present compact paper we explicitly prove that the
minimum ene... | [
{
"created": "Wed, 16 Jun 2021 18:00:14 GMT",
"version": "v1"
}
] | 2021-07-07 | [
[
"Hod",
"Shahar",
""
]
] | Using sophisticated string theory calculations, Maldacena and Susskind have intriguingly shown that near-extremal black holes are characterized by a {\it finite} mass gap above the corresponding zero-temperature (extremal) black-hole configuration. In the present compact paper we explicitly prove that the minimum energ... |
2104.02521 | W.J. Handley | A. N. Lasenby, W. J. Handley, D. J. Bartlett, and C.S. Negreanu | Perturbations and the Future Conformal Boundary | 29 pages, 32 figures | Phys. Rev. D 105, 083514 - Published 19 April 2022 | 10.1103/PhysRevD.105.083514 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The concordance model of cosmology predicts a universe which finishes in a
finite amount of conformal time at a future conformal boundary. We show that
for particular cases we study, the background variables and perturbations may
be analytically continued beyond this boundary and that the "end of the
universe" is not... | [
{
"created": "Mon, 5 Apr 2021 14:53:07 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Apr 2021 11:47:02 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Apr 2022 10:30:42 GMT",
"version": "v3"
}
] | 2022-05-18 | [
[
"Lasenby",
"A. N.",
""
],
[
"Handley",
"W. J.",
""
],
[
"Bartlett",
"D. J.",
""
],
[
"Negreanu",
"C. S.",
""
]
] | The concordance model of cosmology predicts a universe which finishes in a finite amount of conformal time at a future conformal boundary. We show that for particular cases we study, the background variables and perturbations may be analytically continued beyond this boundary and that the "end of the universe" is not n... |
0803.1620 | Orchidea Maria Lecian | O.M. Lecian, G. Montani | Exponential Lagrangian for the Gravitational Field and the problem of
Vacuum Energy | 4 pages, to appear in Proceedings of the II Stueckelberg Workshop -
Int. J. Mod. Phys. A | Int.J.Mod.Phys.A23:1286-1289,2008 | 10.1142/S0217751X0804024X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We will analyze two particular features of an exponential gravitational
Lagrangian. On the one hand, while this choice of the Lagrangian density allows
for two free parameters, only one scale, the cosmological constant, arises as
fundamental when the proper Einsteinian limit is to be recovered. On the other
hand, the... | [
{
"created": "Tue, 11 Mar 2008 16:11:07 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lecian",
"O. M.",
""
],
[
"Montani",
"G.",
""
]
] | We will analyze two particular features of an exponential gravitational Lagrangian. On the one hand, while this choice of the Lagrangian density allows for two free parameters, only one scale, the cosmological constant, arises as fundamental when the proper Einsteinian limit is to be recovered. On the other hand, the v... |
1909.06721 | Fan Zhang | Zhi-Peng Peng, Lee Lindblom, Fan Zhang | Scalar, Vector and Tensor Harmonics on the Flat Compact Orientable
Three-Manifolds | 12 pages; version 2 to match JCAP accepted draft | JCAP12(2019)042 | 10.1088/1475-7516/2019/12/042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observations suggest that our universe is spatially flat on the largest
observable scales. Exactly six different compact orientable three-dimensional
manifolds admit flat metrics. These six manifolds are therefore the most
natural choices for building cosmological models based on the present
observations. This paper ... | [
{
"created": "Sun, 15 Sep 2019 03:23:05 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Nov 2019 03:17:24 GMT",
"version": "v2"
}
] | 2019-12-16 | [
[
"Peng",
"Zhi-Peng",
""
],
[
"Lindblom",
"Lee",
""
],
[
"Zhang",
"Fan",
""
]
] | Observations suggest that our universe is spatially flat on the largest observable scales. Exactly six different compact orientable three-dimensional manifolds admit flat metrics. These six manifolds are therefore the most natural choices for building cosmological models based on the present observations. This paper br... |
2004.08347 | Gregory B. Cook | Gregory B. Cook | Aspects of multimode Kerr ring-down fitting | 31 pages, 48 figures, and 16 tables; added references in
introduction; Fixed typos, errors in Eqs. 45-47, updated reference
information; Fixed index error in Eq. 12 | Phys. Rev. D 102, 024027 (2020) | 10.1103/PhysRevD.102.024027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A black hole that is ringing down to quiescence emits gravitational radiation
of a very specific nature that can inform us of its mass and angular momentum,
test the no-hair theorem for black holes, and perhaps even give us additional
information about its progenitor system. This paper provides a detailed
description... | [
{
"created": "Fri, 17 Apr 2020 17:06:35 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Apr 2020 13:57:37 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Jun 2020 15:55:34 GMT",
"version": "v3"
},
{
"created": "Tue, 30 Jun 2020 19:32:57 GMT",
"version": "v4"
}
] | 2020-07-15 | [
[
"Cook",
"Gregory B.",
""
]
] | A black hole that is ringing down to quiescence emits gravitational radiation of a very specific nature that can inform us of its mass and angular momentum, test the no-hair theorem for black holes, and perhaps even give us additional information about its progenitor system. This paper provides a detailed description o... |
2005.12157 | Frans Klinkhamer | F.R. Klinkhamer | Another model for the regularized big bang | 20 pages, v4: appendix C expanded | null | null | KA-TP-03-2020 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a gravitational model with a Brans-Dicke-type scalar field having,
in the would-be action, a "wrong-sign" kinetic term and a quartic interaction
term. In a cosmological context, we obtain, depending on the boundary
conditions, either the Friedmann solution or a kink-bounce solution. The
expanding-universe ... | [
{
"created": "Mon, 25 May 2020 15:07:51 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jun 2020 14:37:34 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Jun 2020 15:17:15 GMT",
"version": "v3"
},
{
"created": "Thu, 13 Aug 2020 13:07:11 GMT",
"version": "v4"
}
] | 2020-08-14 | [
[
"Klinkhamer",
"F. R.",
""
]
] | We propose a gravitational model with a Brans-Dicke-type scalar field having, in the would-be action, a "wrong-sign" kinetic term and a quartic interaction term. In a cosmological context, we obtain, depending on the boundary conditions, either the Friedmann solution or a kink-bounce solution. The expanding-universe Fr... |
0704.2468 | Alfredo L\'opez Ortega | A. Lopez-Ortega | Dirac quasinormal modes of D-dimensional de Sitter spacetime | 19 pages | Gen.Rel.Grav.39:1011-1029,2007 | 10.1007/s10714-007-0435-1 | null | gr-qc | null | We find exact solutions to the Dirac equation in D-dimensional de Sitter
spacetime. Using these solutions we analytically calculate the de Sitter
quasinormal (QN) frequencies of the Dirac field. For the massive Dirac field
this computation is similar to that previously published for massive fields of
half-integer spi... | [
{
"created": "Thu, 19 Apr 2007 06:18:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lopez-Ortega",
"A.",
""
]
] | We find exact solutions to the Dirac equation in D-dimensional de Sitter spacetime. Using these solutions we analytically calculate the de Sitter quasinormal (QN) frequencies of the Dirac field. For the massive Dirac field this computation is similar to that previously published for massive fields of half-integer spin ... |
2407.20006 | Joseph Bayley | Joseph Bayley, Chris Messenger, Graham Woan | Reconstructing source motion from gravitational wave strain | null | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Searches for un-modelled burst gravitational wave signals return potential
candidates for short duration signals. As there is no clear model for the
source in these searches, one needs to understand and reconstruct the system
that produced the gravitational waves. Here we aim to reconstruct the source
motion and mass... | [
{
"created": "Mon, 29 Jul 2024 13:41:31 GMT",
"version": "v1"
}
] | 2024-07-30 | [
[
"Bayley",
"Joseph",
""
],
[
"Messenger",
"Chris",
""
],
[
"Woan",
"Graham",
""
]
] | Searches for un-modelled burst gravitational wave signals return potential candidates for short duration signals. As there is no clear model for the source in these searches, one needs to understand and reconstruct the system that produced the gravitational waves. Here we aim to reconstruct the source motion and masses... |
2201.12847 | Alejandro Jim\'enez-Cano | Alejandro Jim\'enez-Cano | Metric-Affine Gauge theories of gravity: Foundations and new insights | PhD Thesis. 266 pages, 9 figures. This is a revised version in which
some misprints and errors have been corrected | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis covers several developments performed in metric-affine gravity.
This alternative framework extends General Relativity by considering a more
general connection than the one induced by the metric (i.e., arbitrary torsion
and nonmetricity participate in the dynamics). We start by revising some
mathematical a... | [
{
"created": "Sun, 30 Jan 2022 15:34:42 GMT",
"version": "v1"
}
] | 2022-02-01 | [
[
"Jiménez-Cano",
"Alejandro",
""
]
] | This thesis covers several developments performed in metric-affine gravity. This alternative framework extends General Relativity by considering a more general connection than the one induced by the metric (i.e., arbitrary torsion and nonmetricity participate in the dynamics). We start by revising some mathematical asp... |
1903.03432 | Wenbin Lin | Bo Yang and Wenbin Lin | Post-Keplerian motion in Reissner-Nordstr\"{o}m spacetime | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the analytical post-Newtonian solutions for the test particle's
motion in the Reissner-Nordstr\"{o}m spacetime. The solutions are formulated in
the Wagoner-Will representation, the Epstein-Haugan representation, the
Brumberg representation, and the Damour-Deruelle representation, respectively.
The relation... | [
{
"created": "Wed, 27 Feb 2019 08:05:44 GMT",
"version": "v1"
}
] | 2019-03-11 | [
[
"Yang",
"Bo",
""
],
[
"Lin",
"Wenbin",
""
]
] | We present the analytical post-Newtonian solutions for the test particle's motion in the Reissner-Nordstr\"{o}m spacetime. The solutions are formulated in the Wagoner-Will representation, the Epstein-Haugan representation, the Brumberg representation, and the Damour-Deruelle representation, respectively. The relations ... |
2109.07475 | Timothy Walton | Robin W. Tucker and Timothy J. Walton | Scalar Pre-potentials for Spinor and Tensor Fields on Spacetime | 31 pages, 6 figures, written for Tekin Dereli's 70th birthday
Festschrift celebration. arXiv admin note: text overlap with arXiv:1805.08825 | null | 10.1088/1742-6596/2191/1/012020 | null | gr-qc physics.class-ph | http://creativecommons.org/licenses/by/4.0/ | We review a technique for solving a class of classical linear partial
differential systems of relevance to physics in Minkowski spacetime. All the
equations are amenable to analysis in terms of complex solutions in the kernel
of the scalar Laplacian and a complexified Hertz potential. The
complexification prescriptio... | [
{
"created": "Wed, 15 Sep 2021 10:59:07 GMT",
"version": "v1"
}
] | 2022-02-23 | [
[
"Tucker",
"Robin W.",
""
],
[
"Walton",
"Timothy J.",
""
]
] | We review a technique for solving a class of classical linear partial differential systems of relevance to physics in Minkowski spacetime. All the equations are amenable to analysis in terms of complex solutions in the kernel of the scalar Laplacian and a complexified Hertz potential. The complexification prescription ... |
2406.16031 | Bruce Allen | Bruce Allen, Deepali Agarwal, Joseph D. Romano, Serena Valtolina | Source anisotropies and pulsar timing arrays | 16 pages, 3 figures; revised with h=0.68 in Fig. 3 and more detail
added about expected number density of PTA sources | null | null | null | gr-qc astro-ph.CO astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | Pulsar timing arrays (PTA) hunt for gravitational waves (GW) by searching for
the correlations that GWs induce in the time-of-arrival residuals from
different pulsars. If the GW sources are of astrophysical origin, then they are
located at discrete points on the sky. However, PTA data are often modeled, and
subsequen... | [
{
"created": "Sun, 23 Jun 2024 06:44:56 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jul 2024 15:19:11 GMT",
"version": "v2"
}
] | 2024-07-29 | [
[
"Allen",
"Bruce",
""
],
[
"Agarwal",
"Deepali",
""
],
[
"Romano",
"Joseph D.",
""
],
[
"Valtolina",
"Serena",
""
]
] | Pulsar timing arrays (PTA) hunt for gravitational waves (GW) by searching for the correlations that GWs induce in the time-of-arrival residuals from different pulsars. If the GW sources are of astrophysical origin, then they are located at discrete points on the sky. However, PTA data are often modeled, and subsequentl... |
1105.3907 | J. A. de Freitas Pacheco | Tolu Biressa and J.A. de Freitas Pacheco | The Cosmological Constant and the Gravitational Light Bending | Accepted for publication in General Relativity & Gravitation | null | 10.1007/s10714-011-1186-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The solution of the null non-radial geodesic in a Schwarzschild-de Sitter
background is revisited. The gravitational bending of a light ray is affected
by the cosmological constant, in agreement with the findings of some previous
investigations. The present study confirms that the leading correction term
depends dire... | [
{
"created": "Thu, 19 May 2011 15:19:18 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Biressa",
"Tolu",
""
],
[
"Pacheco",
"J. A. de Freitas",
""
]
] | The solution of the null non-radial geodesic in a Schwarzschild-de Sitter background is revisited. The gravitational bending of a light ray is affected by the cosmological constant, in agreement with the findings of some previous investigations. The present study confirms that the leading correction term depends direct... |
1810.07711 | Vasilis Oikonomou | E. Elizalde, S.D. Odintsov, V.K. Oikonomou, Tanmoy Paul | Logarithmic-corrected $R^2$ Gravity Inflation in the Presence of
Kalb-Ramond Fields | JCAP Accepted | null | 10.1088/1475-7516/2019/02/017 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we shall study the inflationary aspects of a logarithmic
corrected $R^2$ Starobinsky inflation model, in the presence of a Kalb-Ramond
field in the gravitational action of $F(R)$ gravity. Our main interest is to
pin down the effect of this rank two antisymmetric tensor field on the
inflationary phenomen... | [
{
"created": "Wed, 17 Oct 2018 18:02:08 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Feb 2019 19:05:29 GMT",
"version": "v2"
}
] | 2019-02-20 | [
[
"Elizalde",
"E.",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | In this paper we shall study the inflationary aspects of a logarithmic corrected $R^2$ Starobinsky inflation model, in the presence of a Kalb-Ramond field in the gravitational action of $F(R)$ gravity. Our main interest is to pin down the effect of this rank two antisymmetric tensor field on the inflationary phenomenol... |
1010.2062 | Ghanashyam Date | Ghanashyam Date | Lectures on Constrained Systems | 28 pages, no figures | null | null | null | gr-qc hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | These lecture notes were prepared as a basic introduction to the theory of
constrained systems which is how the fundamental forces of nature appear in
their Hamiltonian formulation. Only a working knowledge of Lagrangian and
Hamiltonian formulation of mechanics is assumed. These notes are based on the
set of eight le... | [
{
"created": "Mon, 11 Oct 2010 11:04:39 GMT",
"version": "v1"
}
] | 2010-10-12 | [
[
"Date",
"Ghanashyam",
""
]
] | These lecture notes were prepared as a basic introduction to the theory of constrained systems which is how the fundamental forces of nature appear in their Hamiltonian formulation. Only a working knowledge of Lagrangian and Hamiltonian formulation of mechanics is assumed. These notes are based on the set of eight lect... |
1612.06009 | Hristu Culetu | Hristu Culetu | Source with Nonzero Radial Pressure for the Vaidya Metric | 12 pages, four figures, version published in J. Phys. Soc. Jpn., vol.
87, no. 1, article ID: 014002 (2018) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A null fluid with radial pressure is proposed as the source generating Vaidya
spacetime. The fluid is anisotropic with no transversal pressures and $p =
\rho/3$ as its equation of state, where $p$ is the isotropic pressure and
$\rho$ is the energy density. The radial energy flux is inward directed when
$\dot{m} > 0$ ... | [
{
"created": "Sun, 18 Dec 2016 23:03:49 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Feb 2017 19:06:36 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Dec 2017 09:34:36 GMT",
"version": "v3"
}
] | 2017-12-15 | [
[
"Culetu",
"Hristu",
""
]
] | A null fluid with radial pressure is proposed as the source generating Vaidya spacetime. The fluid is anisotropic with no transversal pressures and $p = \rho/3$ as its equation of state, where $p$ is the isotropic pressure and $\rho$ is the energy density. The radial energy flux is inward directed when $\dot{m} > 0$ an... |
1102.4352 | Jorge Rocha | Jorge V. Rocha, Vitor Cardoso | Gravitational perturbation of the BTZ black hole induced by test
particles and weak cosmic censorship in AdS spacetime | 6 pages, no figures; v2: minor corrections and reference added to
match published version | Phys.Rev.D83:104037,2011 | 10.1103/PhysRevD.83.104037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the gravitational perturbations induced by particles falling into
a three dimensional, asymptotically AdS black hole geometry. More specifically,
we solve the linearized perturbation equations obtained from the geodesic
motion of a ring-like distribution of test particles in the BTZ background.
This setup ... | [
{
"created": "Mon, 21 Feb 2011 21:37:22 GMT",
"version": "v1"
},
{
"created": "Fri, 20 May 2011 11:05:53 GMT",
"version": "v2"
}
] | 2011-06-02 | [
[
"Rocha",
"Jorge V.",
""
],
[
"Cardoso",
"Vitor",
""
]
] | We analyze the gravitational perturbations induced by particles falling into a three dimensional, asymptotically AdS black hole geometry. More specifically, we solve the linearized perturbation equations obtained from the geodesic motion of a ring-like distribution of test particles in the BTZ background. This setup en... |
1503.03340 | Shahram Panahiyan | S. H. Hendi, S. Panahiyan and M. Momennia | Extended phase space of AdS Black Holes in Einstein-Gauss-Bonnet gravity
with a quadratic nonlinear electrodynamics | 19 pages, 14 figures and 7 tables. Matched published version in IJMPD | Int. J. Mod. Phys. D 25, 1650063 (2016) | 10.1142/S0218271816500632 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider quadratic Maxwell invariant as a correction to the
Maxwell theory and study thermodynamic behavior of the black holes in Einstein
and Gauss-Bonnet gravities. We consider cosmological constant as a
thermodynamic pressure to extend phase space. Next, we obtain critical values
in case of varia... | [
{
"created": "Tue, 10 Mar 2015 11:22:10 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2016 19:16:04 GMT",
"version": "v2"
}
] | 2016-05-25 | [
[
"Hendi",
"S. H.",
""
],
[
"Panahiyan",
"S.",
""
],
[
"Momennia",
"M.",
""
]
] | In this paper, we consider quadratic Maxwell invariant as a correction to the Maxwell theory and study thermodynamic behavior of the black holes in Einstein and Gauss-Bonnet gravities. We consider cosmological constant as a thermodynamic pressure to extend phase space. Next, we obtain critical values in case of variati... |
1505.05213 | Lydia Bieri | Lydia Bieri, David Garfinkle, Shing-Tung Yau | Gravitational Waves and Their Memory in General Relativity | To be published in the volume "The Centenary of General Relativity",
volume 20 of "Surveys in Differential Geometry" | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity explains gravitational radiation from binary black hole or
neutron star mergers, from core-collapse supernovae and even from the inflation
period in cosmology. These waves exhibit a unique effect called memory or
Christodoulou effect, which in a detector like LIGO or LISA shows as a
permanent displ... | [
{
"created": "Wed, 20 May 2015 00:11:26 GMT",
"version": "v1"
}
] | 2015-05-21 | [
[
"Bieri",
"Lydia",
""
],
[
"Garfinkle",
"David",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | General relativity explains gravitational radiation from binary black hole or neutron star mergers, from core-collapse supernovae and even from the inflation period in cosmology. These waves exhibit a unique effect called memory or Christodoulou effect, which in a detector like LIGO or LISA shows as a permanent displac... |
1708.03944 | Sergey Paston | S.A. Paston | Forms of action for perfect fluid in General Relativity and mimetic
gravity | LaTeX, 14 pages. Some discussions and references were added in this
version | Phys. Rev. D 96, 084059 (2017) | 10.1103/PhysRevD.96.084059 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider various forms of action allowing us to describe a perfect fluid
in the framework of General Relativity. First we consider a potential motion
without pressure. Starting from an action in terms of the current density
vector built similarly to the action of a single particle, we build a series of
equivalent ... | [
{
"created": "Sun, 13 Aug 2017 17:44:14 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Oct 2017 12:19:56 GMT",
"version": "v2"
}
] | 2017-11-01 | [
[
"Paston",
"S. A.",
""
]
] | We consider various forms of action allowing us to describe a perfect fluid in the framework of General Relativity. First we consider a potential motion without pressure. Starting from an action in terms of the current density vector built similarly to the action of a single particle, we build a series of equivalent ac... |
2307.00860 | Grigory Volovik | G.E. Volovik | Analog Sommerfeld law in quantum vacuum | 8 pages, no figures, title changed, version accepted in JETP Letters | null | null | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The activation temperature $T$ in the de Sitter environment is twice larger
than the Gibbons-Hawking temperature, related to the cosmological horizon. We
consider the activation temperature as the local temperature of the de Sitter
vacuum, and construct the local thermodynamics of the de Sitter state. This
thermodyna... | [
{
"created": "Mon, 3 Jul 2023 09:00:08 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jul 2023 07:20:39 GMT",
"version": "v2"
},
{
"created": "Sun, 9 Jul 2023 14:29:54 GMT",
"version": "v3"
},
{
"created": "Mon, 17 Jul 2023 14:26:02 GMT",
"version": "v4"
}
] | 2023-07-18 | [
[
"Volovik",
"G. E.",
""
]
] | The activation temperature $T$ in the de Sitter environment is twice larger than the Gibbons-Hawking temperature, related to the cosmological horizon. We consider the activation temperature as the local temperature of the de Sitter vacuum, and construct the local thermodynamics of the de Sitter state. This thermodynami... |
1207.1943 | Archana Pai | Archana Pai and K. G. Arun | Singular value decomposition in parametrised tests of post-Newtonian
theory | 17 pages, 6 figures, Accepted for publication in Classical and
Quantum Gravity (Matches with the published version) | Class.Quant.Grav. 30 (2013) 025011 | 10.1088/0264-9381/30/2/025011 | LIGO Document P1200075 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Various coefficients of the 3.5 post-Newtonian (PN) phasing formula of
non-spinning compact binaries moving in circular orbits is fully characterized
by the two component masses. If two of these coefficients are independently
measured, the masses can be estimated. Future gravitational wave observations
could measure ... | [
{
"created": "Mon, 9 Jul 2012 04:25:17 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Apr 2013 11:43:16 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Pai",
"Archana",
""
],
[
"Arun",
"K. G.",
""
]
] | Various coefficients of the 3.5 post-Newtonian (PN) phasing formula of non-spinning compact binaries moving in circular orbits is fully characterized by the two component masses. If two of these coefficients are independently measured, the masses can be estimated. Future gravitational wave observations could measure ma... |
2306.07592 | Motohiko Yoshimura | Kunio Kaneta, Kin-ya Oda, and Motohiko Yoshimura | Gravitational and dark wave emission at binary merger | 9 pages, 2 figures | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | The recently proposed formalism of extended Jordan-Brans-Dicke gravity makes
it possible to calculate energy loss rate due to both gravitational wave and
scalar field (giving the origin of dark energy) wave emission at merger of a
black hole and a neutron star; a binary system of no scalar hair and a star
with the sc... | [
{
"created": "Tue, 13 Jun 2023 07:38:27 GMT",
"version": "v1"
}
] | 2023-06-14 | [
[
"Kaneta",
"Kunio",
""
],
[
"Oda",
"Kin-ya",
""
],
[
"Yoshimura",
"Motohiko",
""
]
] | The recently proposed formalism of extended Jordan-Brans-Dicke gravity makes it possible to calculate energy loss rate due to both gravitational wave and scalar field (giving the origin of dark energy) wave emission at merger of a black hole and a neutron star; a binary system of no scalar hair and a star with the scal... |
1603.01763 | Edward Malec | Wojciech Kulczycki, Edward Malec | Gravitational waves in Friedman-Lemaitre-Robertson-Walker cosmology,
material perturbations and cosmological rotation, and the Huygens principle | misprints corrected, matches version published in Classical and
Quantum Gravity | Class. Quantum Grav. 34, 135014 (2017) | 10.1088/1361-6382/aa7361 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze propagation equations for the polar modes of gravitational waves
in cosmological space-times. We prove that polar gravitational waves must
perturb the density and non-azimuthal components of the velocity of material
medium of the Friedman-Lemaitre-Robertson-Walker spacetimes. Axial
gravitational waves can ... | [
{
"created": "Sat, 5 Mar 2016 22:18:02 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Mar 2017 16:09:11 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Jun 2017 13:59:51 GMT",
"version": "v3"
}
] | 2017-06-26 | [
[
"Kulczycki",
"Wojciech",
""
],
[
"Malec",
"Edward",
""
]
] | We analyze propagation equations for the polar modes of gravitational waves in cosmological space-times. We prove that polar gravitational waves must perturb the density and non-azimuthal components of the velocity of material medium of the Friedman-Lemaitre-Robertson-Walker spacetimes. Axial gravitational waves can in... |
0707.3790 | Frank Reifler | Frank Reifler and Randall Morris | Conditions for exact equivalence of Kaluza-Klein and Yang-Mills theories | null | null | null | null | gr-qc math-ph math.MP quant-ph | null | Although it is well known that Kaluza-Klein and Yang-Mills theories define
equivalent structures on principal bundles, the general conditions for
equivalence of their Lagrangians have not been explicitly stated. In this paper
we address the conditions for equivalence. The formulation of these conditions
is based on p... | [
{
"created": "Wed, 25 Jul 2007 17:43:53 GMT",
"version": "v1"
}
] | 2007-07-26 | [
[
"Reifler",
"Frank",
""
],
[
"Morris",
"Randall",
""
]
] | Although it is well known that Kaluza-Klein and Yang-Mills theories define equivalent structures on principal bundles, the general conditions for equivalence of their Lagrangians have not been explicitly stated. In this paper we address the conditions for equivalence. The formulation of these conditions is based on pre... |
1306.6223 | H{\aa}kan Andr\'easson | H{\aa}kan Andr\'easson and Hans Ringstr\"om | Proof of the cosmic no-hair conjecture in the T^3-Gowdy symmetric
Einstein-Vlasov setting | 72 pages. Revised version to appear in JEMS | null | 10.4171/JEMS/623 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The currently preferred models of the universe undergo accelerated expansion
induced by dark energy. One model for dark energy is a positive cosmological
constant. It is consequently of interest to study Einstein's equations with a
positive cosmological constant coupled to matter satisfying the ordinary energy
condit... | [
{
"created": "Wed, 26 Jun 2013 12:37:02 GMT",
"version": "v1"
},
{
"created": "Mon, 16 May 2016 07:31:36 GMT",
"version": "v2"
}
] | 2021-01-13 | [
[
"Andréasson",
"Håkan",
""
],
[
"Ringström",
"Hans",
""
]
] | The currently preferred models of the universe undergo accelerated expansion induced by dark energy. One model for dark energy is a positive cosmological constant. It is consequently of interest to study Einstein's equations with a positive cosmological constant coupled to matter satisfying the ordinary energy conditio... |
2212.01276 | Jaume Haro | Jaume de Haro and Llibert Arest\'e Sal\'o | An analytic formula to calculate the reheating temperature via
gravitational particle production | 18 pages, 15 figures. Version accepted for publication in PRD | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present for smooth non-oscillating backgrounds an analytic formula which
calculates the energy density of massive and massless particles created via
gravitational particle production, thus giving the corresponding reheating
temperature. It can be applied to models of Quintessential Inflation such as
$\alpha$-attra... | [
{
"created": "Fri, 2 Dec 2022 16:11:20 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Dec 2022 16:37:17 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Jan 2023 08:54:00 GMT",
"version": "v3"
},
{
"created": "Wed, 8 Mar 2023 05:18:52 GMT",
"version": "v4"
}
] | 2023-03-09 | [
[
"de Haro",
"Jaume",
""
],
[
"Saló",
"Llibert Aresté",
""
]
] | We present for smooth non-oscillating backgrounds an analytic formula which calculates the energy density of massive and massless particles created via gravitational particle production, thus giving the corresponding reheating temperature. It can be applied to models of Quintessential Inflation such as $\alpha$-attract... |
1107.1892 | Radouane Gannouji | Radouane Gannouji, M. Sami | Vainshtein mechanism in Gauss-Bonnet gravity and Galileon aether | 9 pages, 5 figures, references added, more details on the
cosmological analysis included, results and conclusions unchanged, final
version to appear in PRD | null | 10.1103/PhysRevD.85.024019 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive field equations of Gauss-Bonnet gravity in 4 dimensions after
dimensional reduction of the action and demonstrate that in this scenario
Vainshtein mechanism operates in the flat spherically symmetric background. We
show that inside this Vainshtein sphere the fifth force is negligibly small
compared to the g... | [
{
"created": "Sun, 10 Jul 2011 20:01:58 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Dec 2011 08:14:12 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Gannouji",
"Radouane",
""
],
[
"Sami",
"M.",
""
]
] | We derive field equations of Gauss-Bonnet gravity in 4 dimensions after dimensional reduction of the action and demonstrate that in this scenario Vainshtein mechanism operates in the flat spherically symmetric background. We show that inside this Vainshtein sphere the fifth force is negligibly small compared to the gra... |
gr-qc/9312011 | Masaru Siino | Masaru Siino | Compact Three Dimensional Black Hole: Topology Change and Closed
Timelike Curve (minor changes) | 20 pages revtex.sty 8 figures contained, TIT/HEP-245/COSMO-40 | Class.Quant.Grav.11:1995-2006,1994 | 10.1088/0264-9381/11/8/007 | null | gr-qc hep-th | null | We present a compactified version of the 3-dimensional black hole recently
found by considering extra identifications and determine the analytical
continuation of the solution beyond its coordinate singularity by extending the
identifications to the extended region of the spacetime. In the extended region
of the spac... | [
{
"created": "Sat, 4 Dec 1993 07:54:08 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Dec 1993 06:20:37 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Siino",
"Masaru",
""
]
] | We present a compactified version of the 3-dimensional black hole recently found by considering extra identifications and determine the analytical continuation of the solution beyond its coordinate singularity by extending the identifications to the extended region of the spacetime. In the extended region of the spacet... |
gr-qc/9903018 | Keith Anguige | K. Anguige (Max Planck Institut fuer Gravitationsphysik, Potsdam) | Isotropic cosmological singularities 3: The Cauchy problem for the
inhomogeneous conformal Einstein-Vlasov equations | LaTeX, 29 pages, no figures | Annals Phys.282:395-419,2000 | 10.1006/aphy.2000.6037 | null | gr-qc | null | We consider the conformal Einstein equations for massless collisionless gas
cosmologies which admit an isotropic singularity. It is shown that the Cauchy
problem for these equations is well-posed with data consisting of the limiting
particle distribution function at the singularity.
| [
{
"created": "Fri, 5 Mar 1999 10:33:12 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Sep 1999 13:36:29 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Anguige",
"K.",
"",
"Max Planck Institut fuer Gravitationsphysik, Potsdam"
]
] | We consider the conformal Einstein equations for massless collisionless gas cosmologies which admit an isotropic singularity. It is shown that the Cauchy problem for these equations is well-posed with data consisting of the limiting particle distribution function at the singularity. |
gr-qc/9706007 | Giovanni Amelino-Camelia | G. Amelino-Camelia (Oxford University) | Classicality, Matter-Antimatter Asymmetry, and Quantum-Gravity Deformed
Uncertainty Relations | 7 pages, LaTex. Accepted for publication in Modern Physics Letters A.
This essay received ``honorable mention'' at the 1997 Gravity Research
Foundation Essay Competition | Mod.Phys.Lett. A12 (1997) 1387-1392 | 10.1142/S0217732397001412 | OUTP-97-26P | gr-qc | null | Some of the recent work on quantum gravity has involved modified uncertainty
relations such that the products of the uncertainties of certain pairs of
observables increase with time. It is here observed that this type of modified
uncertainty relations would lead to quantum decoherence, which could explain
the classic... | [
{
"created": "Tue, 3 Jun 1997 11:45:51 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Amelino-Camelia",
"G.",
"",
"Oxford University"
]
] | Some of the recent work on quantum gravity has involved modified uncertainty relations such that the products of the uncertainties of certain pairs of observables increase with time. It is here observed that this type of modified uncertainty relations would lead to quantum decoherence, which could explain the classical... |
gr-qc/0305024 | Mark A. Miller | Mark Miller | On the Circular Orbit Approximation for Binary Compact Objects In
General Relativity | 10 pages, 12 figures, revtex4 | Phys.Rev. D69 (2004) 124013 | 10.1103/PhysRevD.69.124013 | null | gr-qc astro-ph | null | One often-used approximation in the study of binary compact objects (i.e.,
black holes and neutron stars) in general relativity is the instantaneously
circular orbit assumption. This approximation has been used extensively, from
the calculation of innermost circular orbits to the construction of initial
data for nume... | [
{
"created": "Tue, 6 May 2003 01:26:27 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Miller",
"Mark",
""
]
] | One often-used approximation in the study of binary compact objects (i.e., black holes and neutron stars) in general relativity is the instantaneously circular orbit assumption. This approximation has been used extensively, from the calculation of innermost circular orbits to the construction of initial data for numeri... |
0709.3674 | Takahiro Tanaka | Takahiro Tanaka | Implication of Classical Black Hole Evaporation Conjecture to Floating
Black Holes | 4 pages, 4 figures, Removed ambiguous discussions and corrected
errors. Added references | Prog. Theor. Phys. 121 (2009) 1133 | 10.1143/PTP.121.1133 | KUNS-2097 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Randall-Sundrum single-brane (RS-II) model, it was conjectured that there
is no static large black hole localized on the brane based on adS/CFT
correspondence. Here we consider the phase diagram of black objects in the
models extended from the RS-II model. We propose a scenario for the phase
diagram consistent wit... | [
{
"created": "Sun, 23 Sep 2007 23:48:24 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Mar 2009 09:52:34 GMT",
"version": "v2"
}
] | 2009-08-19 | [
[
"Tanaka",
"Takahiro",
""
]
] | In Randall-Sundrum single-brane (RS-II) model, it was conjectured that there is no static large black hole localized on the brane based on adS/CFT correspondence. Here we consider the phase diagram of black objects in the models extended from the RS-II model. We propose a scenario for the phase diagram consistent with ... |
gr-qc/9912057 | Andri M. Gretarsson | Andri M. Gretarsson, Sheila Rowan, Geppo Cagnoli, Gregory M. Harry,
Jim Hough, Steven D. Penn, Peter R. Saulson, William J. Startin | Pendulum Mode Thermal Noise in Advanced Interferometers: A comparison of
Fused Silica Fibers and Ribbons in the Presence of Surface Loss | Submitted to Physics Letters A (Dec. 14, 1999). Resubmitted to
Physics Letters A (Apr. 3, 2000) after internal (LSC) review process. PACS -
04.80.Nn, 95.55.Ym, 05.40.Ca | Phys.Lett. A270 (2000) 108-114 | 10.1016/S0375-9601(00)00295-4 | null | gr-qc | null | The use of fused-silica ribbons as suspensions in gravitational wave
interferometers can result in significant improvements in pendulum mode thermal
noise. Surface loss sets a lower bound to the level of noise achievable, at
what level depends on the dissipation depth and other physical parameters. For
LIGO II, the h... | [
{
"created": "Wed, 15 Dec 1999 00:05:32 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Apr 2000 20:50:37 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Gretarsson",
"Andri M.",
""
],
[
"Rowan",
"Sheila",
""
],
[
"Cagnoli",
"Geppo",
""
],
[
"Harry",
"Gregory M.",
""
],
[
"Hough",
"Jim",
""
],
[
"Penn",
"Steven D.",
""
],
[
"Saulson",
"Peter R.",
""
],
... | The use of fused-silica ribbons as suspensions in gravitational wave interferometers can result in significant improvements in pendulum mode thermal noise. Surface loss sets a lower bound to the level of noise achievable, at what level depends on the dissipation depth and other physical parameters. For LIGO II, the hig... |
2104.01651 | A. Yu. Petrov | J. R. Nascimento, A. Yu. Petrov, A. R. Vieira | On plane wave solutions in Lorentz-violating extensions of gravity | 14 pages, version accepted to Galaxies | Galaxies, 9(2), 32 (2021) | 10.3390/galaxies9020032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we obtain dispersion relations corresponding to plane wave
solutions in various Lorentz-breaking extensions of gravity with dimensions 3,
4, 5 and 6. We demonstrate that these dispersion relations display an usual
Lorentz-invariant mode when the corresponding additive term involves higher
derivatives.
| [
{
"created": "Sun, 4 Apr 2021 17:41:02 GMT",
"version": "v1"
},
{
"created": "Mon, 10 May 2021 16:52:53 GMT",
"version": "v2"
}
] | 2021-05-11 | [
[
"Nascimento",
"J. R.",
""
],
[
"Petrov",
"A. Yu.",
""
],
[
"Vieira",
"A. R.",
""
]
] | In this paper, we obtain dispersion relations corresponding to plane wave solutions in various Lorentz-breaking extensions of gravity with dimensions 3, 4, 5 and 6. We demonstrate that these dispersion relations display an usual Lorentz-invariant mode when the corresponding additive term involves higher derivatives. |
1707.03189 | Mushtaq Ahmad Sial | M. Farasat Shamir, Mushtaq Ahmad | Some Exact Solutions in $f(\mathcal{G},T)$ Gravity via Noether
Symmetries | 21 pages, 8 figures | Mod. Phys. Lett. A 32(2017)1750086 | 10.1142/S0217732317500869 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to investigate the recently proposed modified
Gauss-Bonnet $f(\mathcal{G},T)$ gravity, with $\mathcal{G}$, the Gauss-Bonnet
term, coupled with ${T}$, the trace of energy-momentum tensor. We have used the
Noether symmetry methodology to discuss some cosmologically important
$f(\mathcal{G},T)$ gra... | [
{
"created": "Tue, 11 Jul 2017 09:28:45 GMT",
"version": "v1"
}
] | 2017-07-12 | [
[
"Shamir",
"M. Farasat",
""
],
[
"Ahmad",
"Mushtaq",
""
]
] | This paper is devoted to investigate the recently proposed modified Gauss-Bonnet $f(\mathcal{G},T)$ gravity, with $\mathcal{G}$, the Gauss-Bonnet term, coupled with ${T}$, the trace of energy-momentum tensor. We have used the Noether symmetry methodology to discuss some cosmologically important $f(\mathcal{G},T)$ gravi... |
1608.08624 | Abril Su\'arez | Abril Su\'arez, Pierre-Henri Chavanis | Cosmological evolution of a complex scalar field with repulsive or
attractive self-interaction | 42 pages, 23 figures. Accepted for publication in Phys. Rev. D | Phys. Rev. D 95, 063515 (2017) | 10.1103/PhysRevD.95.063515 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological evolution of a complex scalar field with a
self-interaction potential $V(|\varphi|^2)$, possibly describing
self-gravitating Bose-Einstein condensates, using a fully general relativistic
treatment. We generalize the hydrodynamic representation of the
Klein-Gordon-Einstein equations in the we... | [
{
"created": "Tue, 30 Aug 2016 21:25:32 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Feb 2017 02:44:36 GMT",
"version": "v2"
}
] | 2017-03-22 | [
[
"Suárez",
"Abril",
""
],
[
"Chavanis",
"Pierre-Henri",
""
]
] | We study the cosmological evolution of a complex scalar field with a self-interaction potential $V(|\varphi|^2)$, possibly describing self-gravitating Bose-Einstein condensates, using a fully general relativistic treatment. We generalize the hydrodynamic representation of the Klein-Gordon-Einstein equations in the weak... |
gr-qc/0202055 | Luis Lehner | Luis Lehner | Numerical Relativity: Status and Prospects | 18 pages, 6 figures, report of the plenary talk at the 16th
International Conference on General Relativity and Gravitation, held at
Durban, S. Africa in July 2001 Corrected 1 figure from previous version | null | 10.1142/9789812776556_0010 | null | gr-qc | null | We are entering an era where the numerical construction of generic spacetimes
is becoming a reality. The use of computer simulations, in principle, allows us
to solve Einstein equations in their full generality and unravel important
messages so far hidden in the theory. Despite the problems still found in
present app... | [
{
"created": "Fri, 15 Feb 2002 00:14:58 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Feb 2002 19:24:34 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Lehner",
"Luis",
""
]
] | We are entering an era where the numerical construction of generic spacetimes is becoming a reality. The use of computer simulations, in principle, allows us to solve Einstein equations in their full generality and unravel important messages so far hidden in the theory. Despite the problems still found in present appli... |
2304.07229 | Shahram Jalalzadeh | R. Jalalzadeh, S. Jalalzadeh, and B. Malekolkalami | Probing extra dimensions through cosmological observations of dark
energy | 18 pages, 2 figures, to appear in Physics of the Dark Univers | Phys. Dark Universe, 41 (2023) 101235 | 10.1016/j.dark.2023.101235 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the isometrically embedded Bianchi type-V cosmology braneworld
model in a $D$-dimensional bulk space. The model provides a fluid of geometric
dark energy (GDE) and unification of fundamental forces similar to the
Kaluza--Klein (KK) theory. The Planck energy density, the fine structure
constant, the muo... | [
{
"created": "Fri, 14 Apr 2023 16:27:11 GMT",
"version": "v1"
}
] | 2023-05-02 | [
[
"Jalalzadeh",
"R.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Malekolkalami",
"B.",
""
]
] | We investigate the isometrically embedded Bianchi type-V cosmology braneworld model in a $D$-dimensional bulk space. The model provides a fluid of geometric dark energy (GDE) and unification of fundamental forces similar to the Kaluza--Klein (KK) theory. The Planck energy density, the fine structure constant, the muon ... |
2301.00698 | Soumitra SenGupta | Arko Bhaumik and Soumitra SenGupta | Nested warped geometry in a non-flat braneworld scenario | 28 Pages, 4 figures | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize nested multiply warped braneworld models by incorporating
non-zero brane curvature caused by an effective cosmological constant {\Omega}
induced on the 3-branes. Starting with the doubly warped model, we first
analyze the case where the maximally warped brane is identified as the visible
brane. For {\Om... | [
{
"created": "Mon, 2 Jan 2023 14:24:21 GMT",
"version": "v1"
}
] | 2023-01-03 | [
[
"Bhaumik",
"Arko",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | We generalize nested multiply warped braneworld models by incorporating non-zero brane curvature caused by an effective cosmological constant {\Omega} induced on the 3-branes. Starting with the doubly warped model, we first analyze the case where the maximally warped brane is identified as the visible brane. For {\Omeg... |
gr-qc/0109096 | Roman A. Konoplya | R.A.Konoplya | Quasinormal modes of the electrically charged dilaton black hole | 7 pages, LaTeX, 8 figures | Gen.Rel.Grav. 34 (2002) 329-335 | 10.1023/A:1015347628961 | null | gr-qc | null | We sketch the results of calculations of the quasinormal frequencies of the
electrically charged dilaton black hole. At the earlier phase of evaporation (Q
is less than 0.7-0.8M), the dilaton black hole "rings" with the complex
frequencies which differ negligibly from those of the Reissner-Nordstrom black
hole. The s... | [
{
"created": "Fri, 28 Sep 2001 15:40:24 GMT",
"version": "v1"
}
] | 2021-10-20 | [
[
"Konoplya",
"R. A.",
""
]
] | We sketch the results of calculations of the quasinormal frequencies of the electrically charged dilaton black hole. At the earlier phase of evaporation (Q is less than 0.7-0.8M), the dilaton black hole "rings" with the complex frequencies which differ negligibly from those of the Reissner-Nordstrom black hole. The spe... |
gr-qc/9607016 | Robert Mann | R.B. Mann and T. Ohta | Exact Solution for Relativistic Two-Body Motion in Dilaton Gravity | 6 pages, latex, 3 figures | Class.Quant.Grav. 14 (1997) 1259-1266 | 10.1088/0264-9381/14/5/027 | WATPHYS-TH96/08 | gr-qc | null | We present an exact solution to the problem of the relativistic motion of 2
point masses in $(1+1)$ dimensional dilaton gravity. The motion of the bodies
is governed entirely by their mutual gravitational influence, and the spacetime
metric is likewise fully determined by their stress-energy. A Newtonian limit
exists... | [
{
"created": "Fri, 5 Jul 1996 19:00:53 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Mann",
"R. B.",
""
],
[
"Ohta",
"T.",
""
]
] | We present an exact solution to the problem of the relativistic motion of 2 point masses in $(1+1)$ dimensional dilaton gravity. The motion of the bodies is governed entirely by their mutual gravitational influence, and the spacetime metric is likewise fully determined by their stress-energy. A Newtonian limit exists, ... |
2202.11707 | H\'ector Vargas-Rodr\'iguez | H. Vargas-Rodr\'iguez, H. C. Rosu, M. G. Medina-Guevara, A. Gallegos,
M.A. Mu\~niz-Torres | Vanishing Poynting observers and electromagnetic field classification in
Kerr and Kerr-Newman spacetimes | 30 pages, 18 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We consider electromagnetic fields having an angular momentum density in a
locally non-rotating reference frame in Schwarzschild, Kerr, and Kerr-Newman
spacetimes. The nature of such fields is assessed with two families of
observers, the locally non-rotating ones and those of vanishing Poynting flux.
The velocity fie... | [
{
"created": "Wed, 23 Feb 2022 02:17:14 GMT",
"version": "v1"
},
{
"created": "Mon, 2 May 2022 00:04:41 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Jun 2022 01:33:09 GMT",
"version": "v3"
}
] | 2022-06-02 | [
[
"Vargas-Rodríguez",
"H.",
""
],
[
"Rosu",
"H. C.",
""
],
[
"Medina-Guevara",
"M. G.",
""
],
[
"Gallegos",
"A.",
""
],
[
"Muñiz-Torres",
"M. A.",
""
]
] | We consider electromagnetic fields having an angular momentum density in a locally non-rotating reference frame in Schwarzschild, Kerr, and Kerr-Newman spacetimes. The nature of such fields is assessed with two families of observers, the locally non-rotating ones and those of vanishing Poynting flux. The velocity field... |
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