id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0101014 | Janna Levin | John D. Barrow and Janna Levin | The twin paradox in compact spaces | to be published in PRA, 3 pages | Phys.Rev. A63 (2001) 044104 | 10.1103/PhysRevA.63.044104 | null | gr-qc astro-ph math-ph math.MP | null | Twins travelling at constant relative velocity will each see the other's time
dilate leading to the apparent paradox that each twin believes the other ages
more slowly. In a finite space, the twins can both be on inertial, periodic
orbits so that they have the opportunity to compare their ages when their paths
cross.... | [
{
"created": "Tue, 2 Jan 2001 18:58:10 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Barrow",
"John D.",
""
],
[
"Levin",
"Janna",
""
]
] | Twins travelling at constant relative velocity will each see the other's time dilate leading to the apparent paradox that each twin believes the other ages more slowly. In a finite space, the twins can both be on inertial, periodic orbits so that they have the opportunity to compare their ages when their paths cross. A... |
1010.5122 | Hajime Ishimori | Hajime Isimori | Renormalizable Quantum Gravity in Low Energy without Violating Unitarity | 19 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce new techniques that can preserve unitarity of the system
including ghost particles. Negative norms of the particles can be involved in
zero-norm states by constraints of the physical space. These are useful to
apply the higher-derivative propagator for quantum gravity to suppress
divergences of vacuum en... | [
{
"created": "Mon, 25 Oct 2010 13:44:15 GMT",
"version": "v1"
}
] | 2010-10-26 | [
[
"Isimori",
"Hajime",
""
]
] | We introduce new techniques that can preserve unitarity of the system including ghost particles. Negative norms of the particles can be involved in zero-norm states by constraints of the physical space. These are useful to apply the higher-derivative propagator for quantum gravity to suppress divergences of vacuum ener... |
1809.02663 | David Delphenich | D. H. Delphenich | Singular teleparallelism | 19 pages, 6 figures | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the geometry of parallelizable manifolds can be extended to
non-parallelizable ones by extending the connection that a global frame field
would define on a parallelizable manifold to a connection that a singular frame
field would define on a non-parallelizable one. The resulting connection would
typi... | [
{
"created": "Fri, 7 Sep 2018 20:26:00 GMT",
"version": "v1"
}
] | 2018-09-11 | [
[
"Delphenich",
"D. H.",
""
]
] | It is shown that the geometry of parallelizable manifolds can be extended to non-parallelizable ones by extending the connection that a global frame field would define on a parallelizable manifold to a connection that a singular frame field would define on a non-parallelizable one. The resulting connection would typica... |
1410.8503 | Ryan Lynch | Ryan Lynch, Salvatore Vitale, Lisa Barsotti, Matthew Evans, Sheila
Dwyer | Effect of squeezing on parameter estimation of gravitational waves
emitted by compact binary systems | null | Physical Review D 91, 044032 (2015) | 10.1103/PhysRevD.91.044032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LIGO gravitational wave (GW) detectors will begin collecting data in
2015, with Virgo following shortly after. The use of squeezing has been
proposed as a way to reduce the quantum noise without increasing the laser
power, and has been successfully tested at one of the LIGO sites and at GEO in
Germany. When used ... | [
{
"created": "Thu, 30 Oct 2014 19:24:38 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Nov 2014 22:12:29 GMT",
"version": "v2"
}
] | 2015-02-24 | [
[
"Lynch",
"Ryan",
""
],
[
"Vitale",
"Salvatore",
""
],
[
"Barsotti",
"Lisa",
""
],
[
"Evans",
"Matthew",
""
],
[
"Dwyer",
"Sheila",
""
]
] | The LIGO gravitational wave (GW) detectors will begin collecting data in 2015, with Virgo following shortly after. The use of squeezing has been proposed as a way to reduce the quantum noise without increasing the laser power, and has been successfully tested at one of the LIGO sites and at GEO in Germany. When used in... |
0906.2557 | Guillermo A. Gonzalez | Antonio C. Guti\'errez-Pi\~neres, Guillermo A. Gonz\'alez and Viviana
M. Vi\~na-Cervantes | A family of relativistic charged thin disks with an inner edge | 11 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new family of exact solutions of the Einstein-Maxwell equations for static
axially symmetric spacetimes is presented. The metric functions of the
solutions are explicitely computed and are simply written in terms of the
oblate spheroidal coordinates. The solutions, obtained by applying the Ernst
method of complex p... | [
{
"created": "Sun, 14 Jun 2009 16:24:05 GMT",
"version": "v1"
}
] | 2009-06-16 | [
[
"Gutiérrez-Piñeres",
"Antonio C.",
""
],
[
"González",
"Guillermo A.",
""
],
[
"Viña-Cervantes",
"Viviana M.",
""
]
] | A new family of exact solutions of the Einstein-Maxwell equations for static axially symmetric spacetimes is presented. The metric functions of the solutions are explicitely computed and are simply written in terms of the oblate spheroidal coordinates. The solutions, obtained by applying the Ernst method of complex pot... |
2405.10574 | Samuel Shuman | Samuel Shuman | Partial Derivatives on Causal Sets | 8 pages, 9 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We will discuss two approaches to estimating partial derivatives and the
metric components; one utilizing past work describing a causal set $\Box$
operator, and one using a construction from linear algebra called the
Moore-Penrose inverse. After running numerical tests on a causal diamond in
$\mathbb{M}^2$, we find t... | [
{
"created": "Fri, 17 May 2024 06:57:42 GMT",
"version": "v1"
}
] | 2024-05-20 | [
[
"Shuman",
"Samuel",
""
]
] | We will discuss two approaches to estimating partial derivatives and the metric components; one utilizing past work describing a causal set $\Box$ operator, and one using a construction from linear algebra called the Moore-Penrose inverse. After running numerical tests on a causal diamond in $\mathbb{M}^2$, we find tha... |
1008.0171 | Vincenzo Vitagliano | Vincenzo Vitagliano, Thomas P. Sotiriou, Stefano Liberati | The dynamics of metric-affine gravity | 26 pages. v2: some footnotes, references and minor changes added to
match the published version. v3: some equations corrected to account for a
term that had been missed, results unaffected | Annals Phys.326:1259-1273,2011 | 10.1016/j.aop.2011.02.008 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Metric-affine theories of gravity provide an interesting alternative to
General Relativity: in such an approach, the metric and the affine (not
necessarily symmetric) connection are independent quantities. Furthermore, the
action should include covariant derivatives of the matter fields, with the
covariant derivative... | [
{
"created": "Sun, 1 Aug 2010 13:07:57 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2011 12:32:50 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Nov 2012 14:32:16 GMT",
"version": "v3"
}
] | 2012-11-08 | [
[
"Vitagliano",
"Vincenzo",
""
],
[
"Sotiriou",
"Thomas P.",
""
],
[
"Liberati",
"Stefano",
""
]
] | Metric-affine theories of gravity provide an interesting alternative to General Relativity: in such an approach, the metric and the affine (not necessarily symmetric) connection are independent quantities. Furthermore, the action should include covariant derivatives of the matter fields, with the covariant derivative n... |
1611.06902 | Arshdeep Singh Bhatia | Arshdeep Singh Bhatia and Sourav Sur | Phase Plane Analysis of Metric-Scalar Torsion Model for Interacting Dark
Energy | 21 pages, 14 figures, 4 tables | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the phase space dynamics of the non-minimally coupled
Metric-Scalar-Torsion model in both Jordan and Einstein frames. We specifically
check for the existence of critical points which yield stable solutions
representing the current state of accelerated expansion of the universe fuelled
by the Dark Energy. It ... | [
{
"created": "Mon, 21 Nov 2016 17:02:29 GMT",
"version": "v1"
}
] | 2016-11-22 | [
[
"Bhatia",
"Arshdeep Singh",
""
],
[
"Sur",
"Sourav",
""
]
] | We study the phase space dynamics of the non-minimally coupled Metric-Scalar-Torsion model in both Jordan and Einstein frames. We specifically check for the existence of critical points which yield stable solutions representing the current state of accelerated expansion of the universe fuelled by the Dark Energy. It is... |
1109.2189 | Ali Shojai | Fatimah Shojai and Ali Shojai | Non-minimal Quintessence: Dynamics and coincidence problem | To appear in Pramana Journal of Physics, 2011 | null | 10.1007/s12043-011-0146-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Brans--Dicke scalar--tensor theory provides a conformally coupling of the
scalar field with gravity in Einstein's frame. This model is equivalent to an
interacting quintessence in which dark matter is coupled to dark energy. This
provides a natural mechanism to alleviate the coincidence problem. We
investigate the dy... | [
{
"created": "Sat, 10 Sep 2011 03:41:38 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Shojai",
"Fatimah",
""
],
[
"Shojai",
"Ali",
""
]
] | Brans--Dicke scalar--tensor theory provides a conformally coupling of the scalar field with gravity in Einstein's frame. This model is equivalent to an interacting quintessence in which dark matter is coupled to dark energy. This provides a natural mechanism to alleviate the coincidence problem. We investigate the dyna... |
2406.10482 | Susobhan Mandal | Susobhan Mandal | Ward identities under the frame transformations in curved spacetime | 14 pages, Accepted in Communications in Theoretical Physics | null | 10.1088/1572-9494/ad582b | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theories of gravity are considered to be competitors to
Einstein's theory of general relativity for the description of classical
gravity, as they are used to build feasible models for cosmic inflation. These
theories can be formulated both in the Jordan and Einstein frame, which are
related by a Weyl tr... | [
{
"created": "Sat, 15 Jun 2024 03:23:49 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Mandal",
"Susobhan",
""
]
] | Scalar-tensor theories of gravity are considered to be competitors to Einstein's theory of general relativity for the description of classical gravity, as they are used to build feasible models for cosmic inflation. These theories can be formulated both in the Jordan and Einstein frame, which are related by a Weyl tran... |
2403.06819 | Orlando Luongo | Rocco D'Agostino, Orlando Luongo, Stefano Mancini | Geometric and topological corrections to Schwarzschild black hole | 9 pages, 4 figures, minor changes, typos corrected, physical results
unaltered | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we compute departures in the black hole thermodynamics induced
by either geometric or topological corrections to general relativity.
Specifically, we analyze the spherically symmetric spacetime solutions of two
modified gravity scenarios with Lagrangians $\mathcal{L}\sim R^{1+\epsilon}$
and $\mathcal{L... | [
{
"created": "Mon, 11 Mar 2024 15:38:11 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Mar 2024 11:49:44 GMT",
"version": "v2"
}
] | 2024-03-18 | [
[
"D'Agostino",
"Rocco",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Mancini",
"Stefano",
""
]
] | In this paper, we compute departures in the black hole thermodynamics induced by either geometric or topological corrections to general relativity. Specifically, we analyze the spherically symmetric spacetime solutions of two modified gravity scenarios with Lagrangians $\mathcal{L}\sim R^{1+\epsilon}$ and $\mathcal{L}\... |
gr-qc/0405038 | Yihuan Wei | Yi-Huan Wei, Yu Tian | SO(1,1) dark energy model and the universe transition | 12 pages. submitted to CQG | Class.Quant.Grav. 21 (2004) 5347-5353 | 10.1088/0264-9381/21/23/004 | null | gr-qc | null | We suggest a scalar model of dark energy with the SO(1,1) symmetry. The model
may be reformulated in terms of a real scalar field $\Phi$ and the scale factor
$a$ so that the Lagrangian may be decomposed as that of the real quintessence
model plus the negative coupling energy term of $\Phi$ to $a$. The existence of
th... | [
{
"created": "Fri, 7 May 2004 08:57:56 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Jul 2004 11:24:34 GMT",
"version": "v2"
},
{
"created": "Sat, 18 Sep 2004 13:14:53 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Wei",
"Yi-Huan",
""
],
[
"Tian",
"Yu",
""
]
] | We suggest a scalar model of dark energy with the SO(1,1) symmetry. The model may be reformulated in terms of a real scalar field $\Phi$ and the scale factor $a$ so that the Lagrangian may be decomposed as that of the real quintessence model plus the negative coupling energy term of $\Phi$ to $a$. The existence of the ... |
2005.12306 | Shi Pi | Shi Pi and Misao Sasaki | Gravitational Waves Induced by Scalar Perturbations with a Lognormal
Peak | 15 pages, 3 figures. Some figures redrawn. References added and
reorganized. Accepted for JCAP | null | 10.1088/1475-7516/2020/09/037 | YITP-20-75, IPMU20-0054 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stochastic gravitational wave (GW) background induced by the
primordial scalar perturbation with the spectrum having a lognormal peak of
width $\Delta$ at $k=k_*$. We derive an analytical formula for the GW spectrum
$\Omega_\text{GW}$ for both narrow ($\Delta\ll1$) and broad ($\Delta\gtrsim1$)
peaks. In ... | [
{
"created": "Mon, 25 May 2020 18:00:30 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Aug 2020 15:14:44 GMT",
"version": "v2"
}
] | 2020-09-30 | [
[
"Pi",
"Shi",
""
],
[
"Sasaki",
"Misao",
""
]
] | We study the stochastic gravitational wave (GW) background induced by the primordial scalar perturbation with the spectrum having a lognormal peak of width $\Delta$ at $k=k_*$. We derive an analytical formula for the GW spectrum $\Omega_\text{GW}$ for both narrow ($\Delta\ll1$) and broad ($\Delta\gtrsim1$) peaks. In th... |
2104.12633 | Alesandro Santos | A. F. Santos, S. C. Ulhoa, T. F. Furtado and Faqir C. Khanna | On the Temperature of Gravitation in the de Sitter Space-Time | 15 pages, 1 figure, accepted for publication in EPJC | null | 10.1140/epjc/s10052-021-09189-3 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The temperature associated with gravitation as presented in the Unruh effect
and Hawking temperature serves to link different areas of physics, such as
gravity, statistical mechanics, and quantum physics. In this paper,
teleparallel gravity is considered to study temperature effects on the de
Sitter space-time. The e... | [
{
"created": "Mon, 26 Apr 2021 14:59:28 GMT",
"version": "v1"
}
] | 2021-05-19 | [
[
"Santos",
"A. F.",
""
],
[
"Ulhoa",
"S. C.",
""
],
[
"Furtado",
"T. F.",
""
],
[
"Khanna",
"Faqir C.",
""
]
] | The temperature associated with gravitation as presented in the Unruh effect and Hawking temperature serves to link different areas of physics, such as gravity, statistical mechanics, and quantum physics. In this paper, teleparallel gravity is considered to study temperature effects on the de Sitter space-time. The eff... |
2204.00119 | R. R. Cuzinatto | Rodrigo R. Cuzinatto, Rajendra P. Gupta, and Pedro J. Pompeia | Dynamical analysis of the covarying coupling constants in scalar-tensor
gravity | 15 pages, 4 figures. v2: 19 pages, 6 figures; stability analysis
expanded and generalized; discussion improved. v3: 27 pages, 6 figures;
appendix added; abstract edited due to arXiv's policy; content matches the
published version | Symmetry 15, 709 (2023) | 10.3390/sym15030709 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A scalar-tensor theory of gravity is considered wherein the gravitational
coupling $G$ and the speed of light $c$ are admitted as space-time functions
and combine to form the definition of the scalar field $\phi$. The varying $c$
participates in the definition of the variation of the matter part of the
action; it is ... | [
{
"created": "Thu, 31 Mar 2022 22:00:22 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Oct 2022 22:10:37 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Apr 2023 22:21:25 GMT",
"version": "v3"
}
] | 2023-04-05 | [
[
"Cuzinatto",
"Rodrigo R.",
""
],
[
"Gupta",
"Rajendra P.",
""
],
[
"Pompeia",
"Pedro J.",
""
]
] | A scalar-tensor theory of gravity is considered wherein the gravitational coupling $G$ and the speed of light $c$ are admitted as space-time functions and combine to form the definition of the scalar field $\phi$. The varying $c$ participates in the definition of the variation of the matter part of the action; it is re... |
2310.09839 | Keisuke Nakashi | Keisuke Nakashi, Masashi Kimura, Hayato Motohashi, Kazufumi Takahashi | Black hole ringdown from physically sensible initial value problem in
higher-order scalar-tensor theories | 36 pages, 11 figures | Phys. Rev. D109, no.2, 024034 (2024) | 10.1103/PhysRevD.109.024034 | RUP-23-19, YITP-23-118 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study odd-parity perturbations about static and spherically symmetric
black hole solutions with a linearly time-dependent scalar field in
higher-order scalar-tensor theories. In particular, we consider stealth
Schwarzschild and stealth Schwarzschild-de Sitter solutions, where the
deviation from the general relativ... | [
{
"created": "Sun, 15 Oct 2023 13:59:11 GMT",
"version": "v1"
}
] | 2024-03-01 | [
[
"Nakashi",
"Keisuke",
""
],
[
"Kimura",
"Masashi",
""
],
[
"Motohashi",
"Hayato",
""
],
[
"Takahashi",
"Kazufumi",
""
]
] | We study odd-parity perturbations about static and spherically symmetric black hole solutions with a linearly time-dependent scalar field in higher-order scalar-tensor theories. In particular, we consider stealth Schwarzschild and stealth Schwarzschild-de Sitter solutions, where the deviation from the general relativit... |
2103.15437 | Diego Rubiera-Garcia | David Benisty, Gonzalo J. Olmo, Diego Rubiera-Garcia | Singularity-free and cosmologically viable Born-Infeld gravity with
scalar matter | 26 pages, 15 figures. v2: bounds on EiBI parameter significantly
improved. Version accepted for publication | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The early Cosmology driven by a single scalar field, both massless and
massive, in the context of Eddington-inspired Born-Infeld gravity, is explored.
We show the existence of nonsingular solutions of bouncing and loitering type
(depending on the sign of the gravitational theory's parameter, $\epsilon$)
replacing the... | [
{
"created": "Mon, 29 Mar 2021 09:08:43 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Nov 2021 08:33:45 GMT",
"version": "v2"
}
] | 2021-11-15 | [
[
"Benisty",
"David",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"Diego",
""
]
] | The early Cosmology driven by a single scalar field, both massless and massive, in the context of Eddington-inspired Born-Infeld gravity, is explored. We show the existence of nonsingular solutions of bouncing and loitering type (depending on the sign of the gravitational theory's parameter, $\epsilon$) replacing the B... |
1809.02045 | Edward Anderson | Edward Anderson | Specific PDEs for Preserved Quantities in Geometry. I. Similarities and
Subgroups | 30 pages, including 6 figures. References updated, minor typos
removed, and notational changes | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide specific PDEs for preserved quantities $Q$ in Geometry, as well as
a bridge between this and specific PDEs for observables $O$ in Physics. We
furthermore prove versions of four other theorems either side of this bridge:
the below enumerated sentences. For the generic geometry - in the sense of it
possessin... | [
{
"created": "Thu, 6 Sep 2018 15:30:23 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Sep 2018 16:11:39 GMT",
"version": "v2"
}
] | 2018-09-25 | [
[
"Anderson",
"Edward",
""
]
] | We provide specific PDEs for preserved quantities $Q$ in Geometry, as well as a bridge between this and specific PDEs for observables $O$ in Physics. We furthermore prove versions of four other theorems either side of this bridge: the below enumerated sentences. For the generic geometry - in the sense of it possessing ... |
1311.5798 | Andrew Steane | Andrew M. Steane | The non-existence of the self-accelerating dipole, and related questions | 10 pages, 4 figures; improved discussion of pressure; added remarks
on simultaneity and Rindler frame | Phys. Rev. D 89, 125006 (2014) | 10.1103/PhysRevD.89.125006 | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the self-force of a constantly accelerating electric dipole,
showing, in particular, that classical electromagnetism does not predict that
an electric dipole could self-accelerate, nor could it levitate in a
gravitational field. We also resolve a paradox concerning the inertial mass of
a longitudinally a... | [
{
"created": "Fri, 22 Nov 2013 16:29:02 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Dec 2013 17:37:43 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Mar 2014 13:40:01 GMT",
"version": "v3"
}
] | 2015-10-13 | [
[
"Steane",
"Andrew M.",
""
]
] | We calculate the self-force of a constantly accelerating electric dipole, showing, in particular, that classical electromagnetism does not predict that an electric dipole could self-accelerate, nor could it levitate in a gravitational field. We also resolve a paradox concerning the inertial mass of a longitudinally acc... |
2310.15180 | Saumya Ghosh | Saumya Ghosh, Arnab Acharya, Sunandan Gangopadhyay and Prasanta K.
Panigrahi | Lorentzian path integral in Kantowski-Sachs anisotropic cosmology | 9 pages, 4 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | Motivated by the recent development in quantum cosmology, we revisit the
anisotropic Kantowski-Sachs model in the light of a Lorentzian path integral
formalism. Studies so far have considered the Euclidean method where the choice
of the lapse integration contour is constrained by certain physical
considerations rathe... | [
{
"created": "Thu, 19 Oct 2023 18:11:57 GMT",
"version": "v1"
}
] | 2023-10-25 | [
[
"Ghosh",
"Saumya",
""
],
[
"Acharya",
"Arnab",
""
],
[
"Gangopadhyay",
"Sunandan",
""
],
[
"Panigrahi",
"Prasanta K.",
""
]
] | Motivated by the recent development in quantum cosmology, we revisit the anisotropic Kantowski-Sachs model in the light of a Lorentzian path integral formalism. Studies so far have considered the Euclidean method where the choice of the lapse integration contour is constrained by certain physical considerations rather ... |
1908.08739 | Albert Huber | Albert Huber | Null Foliations of Spacetime and the Geometry of Black Hole Horizons | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, a method for constructing null foliations of spacetime is
presented. This method is used to specify equivalence classes of null
generators, whose representatives can be associated lightlike co-normals that
are locally affine geodesic and thus locally orthogonal to embedded null
hypersurfaces of spacetim... | [
{
"created": "Fri, 23 Aug 2019 09:48:39 GMT",
"version": "v1"
}
] | 2019-08-26 | [
[
"Huber",
"Albert",
""
]
] | In this work, a method for constructing null foliations of spacetime is presented. This method is used to specify equivalence classes of null generators, whose representatives can be associated lightlike co-normals that are locally affine geodesic and thus locally orthogonal to embedded null hypersurfaces of spacetime.... |
1703.10057 | Sunandan Gangopadhyay | Biplab Paik, Sunandan Gangopadhyay | Accretion onto a noncommutative inspired Schwarzschild black hole | 16 pages Latex, submitted in journal, comments are welcome | Int.J.Mod.Phys. A 33 (2018) 1850084 | 10.1142/S0217751X18500847 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate the problem of ordinary baryonic matter
accretion onto the noncommutative geometry inspired Schwarzschild black hole.
The fundamental equations governing the spherically symmetric steady state
matter accretion are deduced. These equations are seen to be modified due to
the presence of non... | [
{
"created": "Tue, 28 Mar 2017 14:29:34 GMT",
"version": "v1"
}
] | 2018-05-18 | [
[
"Paik",
"Biplab",
""
],
[
"Gangopadhyay",
"Sunandan",
""
]
] | In this paper we investigate the problem of ordinary baryonic matter accretion onto the noncommutative geometry inspired Schwarzschild black hole. The fundamental equations governing the spherically symmetric steady state matter accretion are deduced. These equations are seen to be modified due to the presence of nonco... |
1512.04580 | Marek Szydlowski | Marek Szydlowski, Aleksander Stachowski, Andrzej Borowiec, Aneta
Wojnar | Do sewn singularities falsify the Palatini cosmology? | 26 pages, 15 figures, v3: change of title, more discussion on
singularities | Eur. Phys. J. C76, 567 (2016) | 10.1140/epjc/s10052-016-4426-9 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate further (cf. arXiv:1512.01199, JCAP01 (2016) 040) Starobinsky
cosmological model $R+\gamma R^2$ in the Palatini formalism with Chaplygin gas
and baryonic matter as a source. For this aim we use dynamical system theory.
The dynamics is reduced to the 2D sewn dynamical system of a Newtonian type (a
piece... | [
{
"created": "Thu, 10 Dec 2015 16:22:59 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Dec 2015 18:06:00 GMT",
"version": "v2"
},
{
"created": "Sun, 20 Mar 2016 13:17:05 GMT",
"version": "v3"
}
] | 2017-09-29 | [
[
"Szydlowski",
"Marek",
""
],
[
"Stachowski",
"Aleksander",
""
],
[
"Borowiec",
"Andrzej",
""
],
[
"Wojnar",
"Aneta",
""
]
] | We investigate further (cf. arXiv:1512.01199, JCAP01 (2016) 040) Starobinsky cosmological model $R+\gamma R^2$ in the Palatini formalism with Chaplygin gas and baryonic matter as a source. For this aim we use dynamical system theory. The dynamics is reduced to the 2D sewn dynamical system of a Newtonian type (a piecewi... |
2107.14115 | Tuan Do | Duy H. Nguyen, Tuyen M. Pham, Tuan Q. Do | Anisotropic constant-roll inflation for the Dirac-Born-Infeld model | 14 pages, 14 figures. Matches the published version. All results are
not changed. Comments are welcome | Eur. Phys. J. C 81, 839 (2021) | 10.1140/epjc/s10052-021-09652-1 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study a non-canonical extension of a supergravity-motivated
model acting as a vivid counterexample to the cosmic no-hair conjecture due to
its unusual coupling between scalar and electromagnetic fields. In particular,
a canonical scalar field is replaced by the string-inspired Dirac-Born-Infeld
one ... | [
{
"created": "Thu, 29 Jul 2021 15:38:25 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Aug 2021 11:13:32 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Sep 2021 09:31:50 GMT",
"version": "v3"
}
] | 2021-09-23 | [
[
"Nguyen",
"Duy H.",
""
],
[
"Pham",
"Tuyen M.",
""
],
[
"Do",
"Tuan Q.",
""
]
] | In this paper, we study a non-canonical extension of a supergravity-motivated model acting as a vivid counterexample to the cosmic no-hair conjecture due to its unusual coupling between scalar and electromagnetic fields. In particular, a canonical scalar field is replaced by the string-inspired Dirac-Born-Infeld one in... |
1505.07080 | Roberto Ivan Cabrera Munguia Dr. | I. Cabrera-Munguia | Binary system of unequal counterrotating Kerr-Newman sources | 11 pages, 7 figures, 1 table, typos corrected | Phys. Rev. D 91: 044005 (2015) | 10.1103/PhysRevD.91.044005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stationary axisymmetric binary systems of unequal counterrotating Kerr-Newman
sources with a massless strut in between are studied. By means of the choice of
a suitable parametrization, the axis conditions and the absence of individual
magnetic charges are fulfilled; thus, the entire metric reduces to a
6-parametric ... | [
{
"created": "Tue, 26 May 2015 19:07:21 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jun 2017 09:13:56 GMT",
"version": "v2"
}
] | 2017-07-03 | [
[
"Cabrera-Munguia",
"I.",
""
]
] | Stationary axisymmetric binary systems of unequal counterrotating Kerr-Newman sources with a massless strut in between are studied. By means of the choice of a suitable parametrization, the axis conditions and the absence of individual magnetic charges are fulfilled; thus, the entire metric reduces to a 6-parametric as... |
gr-qc/0111069 | Yuan-Zhong Zhang | J. Luo, Y.X. Nie, Y.Z. Zhang, Z.B. Zhou | Null Result for the Violation of Equivalence Principle with Free-Fall
Rotating Gyroscopes | REVTeX 3.0, 7 pages with 4 Postscript figures | Phys.Rev. D65 (2002) 042005 | 10.1103/PhysRevD.65.042005 | null | gr-qc | null | The differential acceleration between a rotating mechanical gyroscope and a
non-rotating one is directly measured by using a double free-fall
interferometer, and no apparent differential acceleration has been observed at
the relative level of 2x10{-6}. It means that the equivalence principle is
still valid for rotati... | [
{
"created": "Wed, 21 Nov 2001 04:43:38 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Luo",
"J.",
""
],
[
"Nie",
"Y. X.",
""
],
[
"Zhang",
"Y. Z.",
""
],
[
"Zhou",
"Z. B.",
""
]
] | The differential acceleration between a rotating mechanical gyroscope and a non-rotating one is directly measured by using a double free-fall interferometer, and no apparent differential acceleration has been observed at the relative level of 2x10{-6}. It means that the equivalence principle is still valid for rotating... |
2007.12686 | Christian Salas | Christian P. H. Salas | Proving the Relativistic Rotation Paradox | 5 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An apparent paradox in Einstein's Special Theory of Relativity, known as a
Thomas precession rotation in atomic physics, has been verified experimentally
in a number of ways. However, somewhat surprisingly, it has not yet been
demonstrated algebraically in a straightforward manner using
Lorentz-matrix-algebra. Author... | [
{
"created": "Fri, 24 Jul 2020 05:49:45 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jul 2020 18:06:57 GMT",
"version": "v2"
}
] | 2020-07-30 | [
[
"Salas",
"Christian P. H.",
""
]
] | An apparent paradox in Einstein's Special Theory of Relativity, known as a Thomas precession rotation in atomic physics, has been verified experimentally in a number of ways. However, somewhat surprisingly, it has not yet been demonstrated algebraically in a straightforward manner using Lorentz-matrix-algebra. Authors ... |
1208.5869 | Francesco Pannarale | Francesco Pannarale | The Black Hole Remnant of Black Hole-Neutron Star Coalescing Binaries | 16 pages, 11 figures, 5 tables; matches published version | Phys. Rev. D 88, 104025 (2013) | 10.1103/PhysRevD.88.104025 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a model for determining the dimensionless spin parameter and mass
of the black hole remnant of black hole-neutron star mergers with parallel
orbital angular momentum and initial black hole spin. This approach is based on
the Buonanno, Kidder, and Lehner method for binary black holes, and it is
successfully... | [
{
"created": "Wed, 29 Aug 2012 09:27:59 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Nov 2013 23:07:19 GMT",
"version": "v2"
}
] | 2013-11-26 | [
[
"Pannarale",
"Francesco",
""
]
] | We present a model for determining the dimensionless spin parameter and mass of the black hole remnant of black hole-neutron star mergers with parallel orbital angular momentum and initial black hole spin. This approach is based on the Buonanno, Kidder, and Lehner method for binary black holes, and it is successfully t... |
2012.14720 | Massimo Giovannini | Massimo Giovannini | Inflationary magnetogenesis in the perturbative regime | 41 pages; 10 figures | Class.Quant.Grav. 38 (2021) 13, 135018 | 10.1088/1361-6382/abf899 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | While during inflation a phase of increasing gauge coupling allows for a
scale-invariant hyperelectric spectrum, when the coupling decreases a flat
hypermagnetic spectrum can be generated for typical wavelengths larger than the
effective horizon. After the gauge coupling flattens out the late-time
hypermagnetic power... | [
{
"created": "Tue, 29 Dec 2020 12:03:33 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Jun 2021 20:54:43 GMT",
"version": "v2"
}
] | 2021-06-08 | [
[
"Giovannini",
"Massimo",
""
]
] | While during inflation a phase of increasing gauge coupling allows for a scale-invariant hyperelectric spectrum, when the coupling decreases a flat hypermagnetic spectrum can be generated for typical wavelengths larger than the effective horizon. After the gauge coupling flattens out the late-time hypermagnetic power s... |
2308.12368 | Petr Jizba | Petr Jizba, Gaetano Lambiase, Giuseppe Gaetano Luciano and Luciano
Petruzziello | Coherent states for generalized uncertainty relations as Tsallis
probability amplitudes: new route to non-extensive thermostatistics | 25 pages, 4 figures, accepted to Physical Review D | Phys. Rev. D 108, 064024 (2023) | 10.1103/PhysRevD.108.064024 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | We study coherent states associated to a generalized uncertainty principle
(GUP). We separately analyze the cases of positive and negative deformation
parameter $\beta$, showing that the ensuing probability distribution is a
Tsallis distribution whose non-extensivity parameter $q$ is monotonically
related to $\beta$.... | [
{
"created": "Wed, 23 Aug 2023 18:16:15 GMT",
"version": "v1"
}
] | 2023-09-13 | [
[
"Jizba",
"Petr",
""
],
[
"Lambiase",
"Gaetano",
""
],
[
"Luciano",
"Giuseppe Gaetano",
""
],
[
"Petruzziello",
"Luciano",
""
]
] | We study coherent states associated to a generalized uncertainty principle (GUP). We separately analyze the cases of positive and negative deformation parameter $\beta$, showing that the ensuing probability distribution is a Tsallis distribution whose non-extensivity parameter $q$ is monotonically related to $\beta$. M... |
gr-qc/0503022 | Steven Carlip | S. Carlip | Conformal Field Theory, (2+1)-Dimensional Gravity, and the BTZ Black
Hole | 50 pages, LaTeX; draft of review article -- comments, corrections,
additions, complaints welcomed; v2: more and better references, minor
additions; v3: more references; v4: minor typos corrected to match published
version | Class.Quant.Grav.22:R85-R124,2005 | 10.1088/0264-9381/22/12/R01 | UCD-05-02 | gr-qc hep-th | null | In three spacetime dimensions, general relativity becomes a topological field
theory, whose dynamics can be largely described holographically by a
two-dimensional conformal field theory at the ``boundary'' of spacetime. I
review what is known about this reduction--mainly within the context of pure
(2+1)-dimensional g... | [
{
"created": "Fri, 4 Mar 2005 22:56:40 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Mar 2005 01:04:28 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Mar 2005 18:59:47 GMT",
"version": "v3"
},
{
"created": "Mon, 6 Jun 2005 20:59:34 GMT",
"version": "v4"
}
] | 2010-04-28 | [
[
"Carlip",
"S.",
""
]
] | In three spacetime dimensions, general relativity becomes a topological field theory, whose dynamics can be largely described holographically by a two-dimensional conformal field theory at the ``boundary'' of spacetime. I review what is known about this reduction--mainly within the context of pure (2+1)-dimensional gra... |
1211.5957 | Harvey S. Reall | Harvey S. Reall, Alexander A. H. Graham and Carl P. Turner | On algebraically special vacuum spacetimes in five dimensions | 25 pages. v2: typos corrected | null | 10.1088/0264-9381/30/5/055004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vacuum solutions admitting a hypersurface-orthogonal repeated principal null
direction are an important class of 4d algebraically special spacetimes. We
investigate the 5d analogues of such solutions: vacuum spacetimes admitting a
hypersurface-orthogonal multiple Weyl aligned null direction (WAND). Such
spacetimes fa... | [
{
"created": "Mon, 26 Nov 2012 14:10:23 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Jan 2013 11:02:16 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Reall",
"Harvey S.",
""
],
[
"Graham",
"Alexander A. H.",
""
],
[
"Turner",
"Carl P.",
""
]
] | Vacuum solutions admitting a hypersurface-orthogonal repeated principal null direction are an important class of 4d algebraically special spacetimes. We investigate the 5d analogues of such solutions: vacuum spacetimes admitting a hypersurface-orthogonal multiple Weyl aligned null direction (WAND). Such spacetimes fall... |
1702.01593 | Andronikos Paliathanasis | Andronikos Paliathanasis and P.G.L. Leach | Symmetries and Singularities of the Szekeres System | 6 pages, to be published in Phys. Lett. A | Phys. Lett. A 381, 1277 (2017) | 10.1016/j.physleta.2017.02.009 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Szekeres system is studied with two methods for the determination of
conservation laws. Specifically we apply the theory of group invariant
transformations and the method of singularity analysis. We show that the
Szekeres system admits a Lagrangian and the conservation laws that we find can
be derived by the appl... | [
{
"created": "Mon, 6 Feb 2017 12:32:19 GMT",
"version": "v1"
}
] | 2017-03-09 | [
[
"Paliathanasis",
"Andronikos",
""
],
[
"Leach",
"P. G. L.",
""
]
] | The Szekeres system is studied with two methods for the determination of conservation laws. Specifically we apply the theory of group invariant transformations and the method of singularity analysis. We show that the Szekeres system admits a Lagrangian and the conservation laws that we find can be derived by the applic... |
2312.16804 | Daniel R Terno | Pravin K. Dahal, Swayamsiddha Maharana, Fil Simovic, Ioannis
Soranidis, and Daniel R. Terno | Models of cosmological black holes | 8 pages, 2 figures. Comments welcome! | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study various aspects of modeling astrophysical black holes using the
recently introduced semiclassical formalism of physical black holes (PBHs).
This approach is based on the minimal requirements of observability and
regularity of the horizons. We demonstrate that PBHs do not directly couple to
the cosmological b... | [
{
"created": "Thu, 28 Dec 2023 03:18:54 GMT",
"version": "v1"
}
] | 2023-12-29 | [
[
"Dahal",
"Pravin K.",
""
],
[
"Maharana",
"Swayamsiddha",
""
],
[
"Simovic",
"Fil",
""
],
[
"Soranidis",
"Ioannis",
""
],
[
"Terno",
"Daniel R.",
""
]
] | We study various aspects of modeling astrophysical black holes using the recently introduced semiclassical formalism of physical black holes (PBHs). This approach is based on the minimal requirements of observability and regularity of the horizons. We demonstrate that PBHs do not directly couple to the cosmological bac... |
2107.02386 | Mohammad Ali Gorji | Jibril Ben Achour, Antonio De Felice, Mohammad Ali Gorji, Shinji
Mukohyama, Masroor C. Pookkillath | Disformal map and Petrov classification in modified gravity | 26+11 pages, 2 tables, matches the published version | null | 10.1088/1475-7516/2021/10/067 | YITP-21-72, IPMU21-0046 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Disformal transformation provides a map relating different scalar-tensor and
vector-tensor theories and gives access to a powerful solution-generating
method in modified gravity. In view of the vast family of new solutions one can
achieve, it is crucial to design suitable tools to guide their construction. In
this wo... | [
{
"created": "Tue, 6 Jul 2021 04:52:08 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Feb 2022 00:58:23 GMT",
"version": "v2"
}
] | 2022-02-09 | [
[
"Achour",
"Jibril Ben",
""
],
[
"De Felice",
"Antonio",
""
],
[
"Gorji",
"Mohammad Ali",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Pookkillath",
"Masroor C.",
""
]
] | Disformal transformation provides a map relating different scalar-tensor and vector-tensor theories and gives access to a powerful solution-generating method in modified gravity. In view of the vast family of new solutions one can achieve, it is crucial to design suitable tools to guide their construction. In this work... |
1611.05326 | Julio Cesar Fabris | J\'ulio C. Fabris, Tays Miranda, Oliver F. Piattella | An exponential correction to Starobinsky's inflationary model | Latex file, 6 pages, 2 figures. For the Proceedings of the
International Conference on Particle Physics and Astrophysics, ICPPA 2016,
October 10-14 2016, Moscow, Russia | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse $f(R)$ theories of gravity from a dynamical system perspective,
showing how the $R^2$ correction in Starobinsky's model plays a crucial role
from the viewpoint of the inflationary paradigm. Then, we propose a
modification of Starobinsky's model by adding an exponential term in the $f(R)$
Lagrangian. We sho... | [
{
"created": "Tue, 15 Nov 2016 13:08:29 GMT",
"version": "v1"
}
] | 2016-11-17 | [
[
"Fabris",
"Júlio C.",
""
],
[
"Miranda",
"Tays",
""
],
[
"Piattella",
"Oliver F.",
""
]
] | We analyse $f(R)$ theories of gravity from a dynamical system perspective, showing how the $R^2$ correction in Starobinsky's model plays a crucial role from the viewpoint of the inflationary paradigm. Then, we propose a modification of Starobinsky's model by adding an exponential term in the $f(R)$ Lagrangian. We show ... |
2205.10566 | Luciano Petruzziello | Luciano Petruzziello | Equivalence principle violation from large scale structure | null | null | 10.1016/j.physletb.2022.137293 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | We explore the interplay between the equivalence principle and a
generalization of the Heisenberg uncertainty relations known as extended
uncertainty principle, that comprises the effects of spacetime curvature at
large distances. Specifically, we observe that, when the modified uncertainty
relations hold, the weak f... | [
{
"created": "Sat, 21 May 2022 11:17:15 GMT",
"version": "v1"
}
] | 2022-07-27 | [
[
"Petruzziello",
"Luciano",
""
]
] | We explore the interplay between the equivalence principle and a generalization of the Heisenberg uncertainty relations known as extended uncertainty principle, that comprises the effects of spacetime curvature at large distances. Specifically, we observe that, when the modified uncertainty relations hold, the weak for... |
1004.5435 | Kiyoshi Shiraishi | Teruki Hanada, Koichiro Kobayashi, Kazuhiko Shinoda and Kiyoshi
Shiraishi (Yamaguchi University) | Classical and Quantum Cosmology of Multigravity | 17 pages, 15 figures, RevTeX4.1, revised version | Class.Quant.Grav.27:225010,2010 | 10.1088/0264-9381/27/22/225010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a multigraviton theory on a simple closed circuit graph
corresponding to the discretization of $S^1$ compactification of the
Kaluza-Klein (KK) theory has been considered. In the present paper, we extend
this theory to that on a general graph and study what modes of particles are
included. Furthermore, we ge... | [
{
"created": "Fri, 30 Apr 2010 02:27:44 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Aug 2010 10:32:01 GMT",
"version": "v2"
}
] | 2011-01-27 | [
[
"Hanada",
"Teruki",
"",
"Yamaguchi University"
],
[
"Kobayashi",
"Koichiro",
"",
"Yamaguchi University"
],
[
"Shinoda",
"Kazuhiko",
"",
"Yamaguchi University"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi University"
]
] | Recently, a multigraviton theory on a simple closed circuit graph corresponding to the discretization of $S^1$ compactification of the Kaluza-Klein (KK) theory has been considered. In the present paper, we extend this theory to that on a general graph and study what modes of particles are included. Furthermore, we gene... |
2312.06618 | Sergey L Cherkas | Sergey L. Cherkas and Vladimir L. Kalashnikov | Scalar Product for a Version of Minisuperspace Model with Grassmann
Variables | 20 pages, 3 figures | Universe 2023, 9(12), 508 | 10.3390/universe9120508 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Grassmann variables are used to formally transform a system with constraints
into an unconstrained system. As a result, the Schr\"{o}dinger equation arises
instead of the Wheeler-DeWitt one. The Schr\"{o}dinger equation describes a
system's evolution, but a definition of the scalar product is needed to
calculate the ... | [
{
"created": "Fri, 8 Dec 2023 11:35:08 GMT",
"version": "v1"
}
] | 2023-12-12 | [
[
"Cherkas",
"Sergey L.",
""
],
[
"Kalashnikov",
"Vladimir L.",
""
]
] | Grassmann variables are used to formally transform a system with constraints into an unconstrained system. As a result, the Schr\"{o}dinger equation arises instead of the Wheeler-DeWitt one. The Schr\"{o}dinger equation describes a system's evolution, but a definition of the scalar product is needed to calculate the me... |
2202.04323 | Luisa Jaime | Luisa G. Jaime and Gustavo Arciniega | A unified geometric description of the Universe: from inflation to
late-time acceleration without an inflaton nor a cosmological constant | Accepted in Physics Letters B. 13 pages, 4 figures | null | 10.1016/j.physletb.2022.136939 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a cosmological model arising from a gravitational theory with an
infinite tower of higher-order curvature invariants that can reproduce the
entire evolution of the Universe: from inflation to late-time acceleration,
without invoking an inflaton nor a cosmological constant. The theory is
Einsteinian-like. T... | [
{
"created": "Wed, 9 Feb 2022 08:07:49 GMT",
"version": "v1"
}
] | 2022-02-10 | [
[
"Jaime",
"Luisa G.",
""
],
[
"Arciniega",
"Gustavo",
""
]
] | We present a cosmological model arising from a gravitational theory with an infinite tower of higher-order curvature invariants that can reproduce the entire evolution of the Universe: from inflation to late-time acceleration, without invoking an inflaton nor a cosmological constant. The theory is Einsteinian-like. The... |
2206.07066 | Gianluca Calcagni | Gianluca Calcagni, Leonardo Modesto | Testing quantum gravity with primordial gravitational waves | 1+33 pages, 2 figures. v2: nature of beta coefficients clarified. v3:
expanded version, new introduction and summary of setting, derivation of
cosmological spectra moved from companion paper arXiv:2206.06384 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a testable alternative to inflation directly built in a very
general class of ultraviolet complete theories of quantum gravity enjoying Weyl
conformal invariance. After the latter is spontaneously broken, logarithmic
quantum corrections to the action make both the primordial tensor spectrum
(from graviton ... | [
{
"created": "Tue, 14 Jun 2022 18:00:03 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jul 2022 02:43:23 GMT",
"version": "v2"
},
{
"created": "Wed, 29 May 2024 11:02:21 GMT",
"version": "v3"
}
] | 2024-05-30 | [
[
"Calcagni",
"Gianluca",
""
],
[
"Modesto",
"Leonardo",
""
]
] | We propose a testable alternative to inflation directly built in a very general class of ultraviolet complete theories of quantum gravity enjoying Weyl conformal invariance. After the latter is spontaneously broken, logarithmic quantum corrections to the action make both the primordial tensor spectrum (from graviton fl... |
1010.0878 | Sasa Ilijic | Dubravko Horvat, Sasa Ilijic, Anja Marunovic | Radial pulsations and stability of anisotropic stars with quasi-local
equation of state | 15 pages, 3 figures, v2: very minor changes, matches published
version | Class.Quant.Grav.28:025009,2011 | 10.1088/0264-9381/28/2/025009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasi-local variables, i.e. quantities whose values can be derived from
physics accessible within an arbitrarily small neighborhood of a spacetime
point, are used to construct the equation of state (EoS) for the anisotropic
fluid in the spherical symmetry. One parameter families of equilibrium
solutions are obtained ... | [
{
"created": "Tue, 5 Oct 2010 13:30:10 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jan 2011 08:03:05 GMT",
"version": "v2"
}
] | 2011-01-20 | [
[
"Horvat",
"Dubravko",
""
],
[
"Ilijic",
"Sasa",
""
],
[
"Marunovic",
"Anja",
""
]
] | Quasi-local variables, i.e. quantities whose values can be derived from physics accessible within an arbitrarily small neighborhood of a spacetime point, are used to construct the equation of state (EoS) for the anisotropic fluid in the spherical symmetry. One parameter families of equilibrium solutions are obtained ma... |
gr-qc/0408093 | Yuri Shtanov | Dmytro Iakubovskyi and Yuri Shtanov | Braneworld cosmological solutions and their stability | 23 pages, 2 figures, sections 3 and 4 revised, matches the version to
be published | Class.Quant.Grav. 22 (2005) 2415-2432 | 10.1088/0264-9381/22/12/008 | null | gr-qc | null | We consider cosmological solutions and their stability with respect to
homogeneous and isotropic perturbations in the braneworld model with the
scalar-curvature term in the action for the brane. Part of the results are
similar to those obtained by Campos and Sopuerta for the Randall-Sundrum
braneworld model. Specific... | [
{
"created": "Mon, 30 Aug 2004 14:10:46 GMT",
"version": "v1"
},
{
"created": "Sat, 7 May 2005 15:57:18 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Iakubovskyi",
"Dmytro",
""
],
[
"Shtanov",
"Yuri",
""
]
] | We consider cosmological solutions and their stability with respect to homogeneous and isotropic perturbations in the braneworld model with the scalar-curvature term in the action for the brane. Part of the results are similar to those obtained by Campos and Sopuerta for the Randall-Sundrum braneworld model. Specifical... |
1106.1448 | Seth A. Major | Franz Hinterleitner and Seth Major | Towards Loop Quantization of Plane Gravitational Waves | 14 pages | null | 10.1088/0264-9381/29/6/065019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The polarized Gowdy model in terms of Ashtekar-Barbero variables is further
reduced by including the Killing equations for plane-fronted parallel
gravitational waves with parallel rays. The resulting constraint algebra,
including one constraint derived from the Killing equations in addition to the
standard ones of Ge... | [
{
"created": "Tue, 7 Jun 2011 20:22:25 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Hinterleitner",
"Franz",
""
],
[
"Major",
"Seth",
""
]
] | The polarized Gowdy model in terms of Ashtekar-Barbero variables is further reduced by including the Killing equations for plane-fronted parallel gravitational waves with parallel rays. The resulting constraint algebra, including one constraint derived from the Killing equations in addition to the standard ones of Gene... |
2403.17457 | Shunsuke Fujii | Akio Hosoya, Shunsuke Fujii | Energy-momentum Tensor: Noether vs Hilbert | After further confirmation of other published papers, we found that
our paper is not new. Thus we are going to withdraw our paper from arXiv | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the old problem of the energy-momentum tensor in general
relativistic field theories. On the basis of the general covariance we derive a
simple equation for the Hilbert and Noether energy-momentum tensors for the
scalar and electromagnetic field theories. We see that the two definitions of
energy-momentum ... | [
{
"created": "Tue, 26 Mar 2024 07:46:26 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Apr 2024 05:57:23 GMT",
"version": "v2"
}
] | 2024-05-01 | [
[
"Hosoya",
"Akio",
""
],
[
"Fujii",
"Shunsuke",
""
]
] | We revisit the old problem of the energy-momentum tensor in general relativistic field theories. On the basis of the general covariance we derive a simple equation for the Hilbert and Noether energy-momentum tensors for the scalar and electromagnetic field theories. We see that the two definitions of energy-momentum te... |
1906.11311 | Jorge Ernesto Horvath | L. S. Rocha (IAG - USP, Brazil), A. Bernardo (IAG - USP, Brazil), M.
G. B. de Avellar (UNIFESP - Diadema and ITA - S\~ao Jos\'e dos Campos,
Brazil), J. E. Horvath (IAG - USP, Brazil) | Exact solutions for compact stars with CFL quark matter | Submitted to IJMPD on January 2020, 13 pages, 6 figures, anisotropy
discussion enlarged and clarified | null | 10.1142/S0218271820500443 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The search for the true ground state of the dense matter remains open since
Bodmer, Terazawa and other raised the possibility of stable quarks, boosted by
Witten's $strange$ $matter$ hypothesis in 1984. Within this proposal, the
strange matter is assumed to be composed of $strange$ quarks in addition to the
usual $up... | [
{
"created": "Wed, 26 Jun 2019 19:38:30 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jun 2019 03:42:19 GMT",
"version": "v2"
},
{
"created": "Sat, 9 Nov 2019 16:07:19 GMT",
"version": "v3"
},
{
"created": "Fri, 17 Jan 2020 15:34:17 GMT",
"version": "v4"
}
] | 2020-07-15 | [
[
"Rocha",
"L. S.",
"",
"IAG - USP, Brazil"
],
[
"Bernardo",
"A.",
"",
"IAG - USP, Brazil"
],
[
"de Avellar",
"M. G. B.",
"",
"UNIFESP - Diadema and ITA - São José dos Campos,\n Brazil"
],
[
"Horvath",
"J. E.",
"",
"IAG - USP, Brazil"
]
... | The search for the true ground state of the dense matter remains open since Bodmer, Terazawa and other raised the possibility of stable quarks, boosted by Witten's $strange$ $matter$ hypothesis in 1984. Within this proposal, the strange matter is assumed to be composed of $strange$ quarks in addition to the usual $up$s... |
1009.3427 | Thomas M\"uller | Sebastian Boblest, Thomas M\"uller, G\"unter Wunner | Twin Paradox in de Sitter Spacetime | 15 pages, 19 figures, 5 tables | Eur.J.Phys.32:1117-1142,2011 | 10.1088/0143-0807/32/5/001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The "twin paradox" of special relativity offers the possibility to make
interstellar flights within a lifetime. For very long journeys with velocities
close to the speed of light, however, we have to take into account the
expansion of the universe. Inspired by the work of Rindler on hyperbolic motion
in curved spacet... | [
{
"created": "Wed, 1 Sep 2010 17:05:16 GMT",
"version": "v1"
}
] | 2011-07-28 | [
[
"Boblest",
"Sebastian",
""
],
[
"Müller",
"Thomas",
""
],
[
"Wunner",
"Günter",
""
]
] | The "twin paradox" of special relativity offers the possibility to make interstellar flights within a lifetime. For very long journeys with velocities close to the speed of light, however, we have to take into account the expansion of the universe. Inspired by the work of Rindler on hyperbolic motion in curved spacetim... |
gr-qc/0408025 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Consistent discretizations and quantum gravity | 7 pages, to appear in the proceedings of The II International
Conference on > Fundamental Interactions, O. Piguet (editor), Editora UNESP,
Sao Paulo | null | null | LSU-REL-080904 | gr-qc | null | We review a recent proposal for the construction of a quantum theory of the
gravitational field. The proposal is based on approximating the continuum
theory by a discrete theory that has several attractive properties, among them,
the fact that in its canonical formulation it is free of constraints. This
allows to byp... | [
{
"created": "Mon, 9 Aug 2004 21:52:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We review a recent proposal for the construction of a quantum theory of the gravitational field. The proposal is based on approximating the continuum theory by a discrete theory that has several attractive properties, among them, the fact that in its canonical formulation it is free of constraints. This allows to bypas... |
1608.03489 | Adrian Melissinos | Adrian Melissinos | Use of the gravitational-wave interferometers to test Lorentz invariance
violation | Presented at the Seventh Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, June 20-24, 2016 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Currently operating gravitational-wave interferometers are Michelson
interferometers with effective arm length L ~ 4x10e5 m. While the
interferometer remains in lock, data at the fsr sideband frequency encode
information on slow phase changes in the f ~ 10e-5 Hz range, with a fringe
sensitivity ~ 10e-10. Preliminary ... | [
{
"created": "Wed, 10 Aug 2016 19:27:23 GMT",
"version": "v1"
}
] | 2016-08-12 | [
[
"Melissinos",
"Adrian",
""
]
] | Currently operating gravitational-wave interferometers are Michelson interferometers with effective arm length L ~ 4x10e5 m. While the interferometer remains in lock, data at the fsr sideband frequency encode information on slow phase changes in the f ~ 10e-5 Hz range, with a fringe sensitivity ~ 10e-10. Preliminary LI... |
1105.4434 | Carlos A. R. Herdeiro | P.P. Avelino, A.J.S. Hamilton, C.A.R. Herdeiro and M. Zilhao | Mass inflation in a D dimensional Reissner-Nordstrom black hole: a
hierarchy of particle accelerators ? | 8 pages, 6 figures | Phys.Rev.D84:024019,2011 | 10.1103/PhysRevD.84.024019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geometry inside the event horizon of perturbed D dimensional
Reissner-Nordstrom-(A)dS type black holes showing that, similarly to the four
dimensional case, mass inflation also occurs for D>4. First, using the
homogeneous approximation, we show that an increase of the number of spatial
dimensions contrib... | [
{
"created": "Mon, 23 May 2011 08:41:30 GMT",
"version": "v1"
}
] | 2015-03-19 | [
[
"Avelino",
"P. P.",
""
],
[
"Hamilton",
"A. J. S.",
""
],
[
"Herdeiro",
"C. A. R.",
""
],
[
"Zilhao",
"M.",
""
]
] | We study the geometry inside the event horizon of perturbed D dimensional Reissner-Nordstrom-(A)dS type black holes showing that, similarly to the four dimensional case, mass inflation also occurs for D>4. First, using the homogeneous approximation, we show that an increase of the number of spatial dimensions contribut... |
1803.01204 | Rafael Bernar | Rafael P. Bernar, Lu\'is C. B. Crispino, Atsushi Higuchi | The Gibbons-Hawking radiation of gravitons in the Poincar\'e and static
patches of de Sitter spacetime | 10 pages, no figures. Accepted for publication in Physical Review D | Phys. Rev. D 97, 085005 (2018) | 10.1103/PhysRevD.97.085005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the quantization of linearized gravity in the background de Sitter
spacetime using a gauge-invariant formalism to write the perturbed
gravitational field in the static patch. This field is quantized after fixing
the gauge completely. The response rate of this field to monochromatic
multipole sources is the... | [
{
"created": "Sat, 3 Mar 2018 17:21:27 GMT",
"version": "v1"
}
] | 2018-04-11 | [
[
"Bernar",
"Rafael P.",
""
],
[
"Crispino",
"Luís C. B.",
""
],
[
"Higuchi",
"Atsushi",
""
]
] | We discuss the quantization of linearized gravity in the background de Sitter spacetime using a gauge-invariant formalism to write the perturbed gravitational field in the static patch. This field is quantized after fixing the gauge completely. The response rate of this field to monochromatic multipole sources is then ... |
2112.11676 | Rubab Manzoor | Rubab Manzoor and Wasee Shahid | Evolution of Cluster of Stars in f(R) Gravity | null | Physics of the Dark Universe: Volume 33, September 2021, 100844 | 10.1016/j.dark.2021.100844 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper explores the dynamics of evolving cluster of stars in the
presences of exotic matter. The $f(R)$ theory is used to presume exotic terms
for evolution scenario. We use structure scalars as evolution parameters to
explore dynamics of spherically symmetric distribution of evolving cluster of
stars. We conside... | [
{
"created": "Wed, 22 Dec 2021 05:55:56 GMT",
"version": "v1"
}
] | 2021-12-23 | [
[
"Manzoor",
"Rubab",
""
],
[
"Shahid",
"Wasee",
""
]
] | This paper explores the dynamics of evolving cluster of stars in the presences of exotic matter. The $f(R)$ theory is used to presume exotic terms for evolution scenario. We use structure scalars as evolution parameters to explore dynamics of spherically symmetric distribution of evolving cluster of stars. We consider ... |
1907.09902 | Hossein Mohseni Sadjadi | H. Mohseni Sadjadi and M. Khodaei | Regular scalar field around reflecting stars and black holes, and
reflecting star polarization | 14 pages, references updated | J. Cosmol. Astropart. Phys. 12 , 005 (2019) | 10.1088/1475-7516/2019/12/005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of a regular non-trivial scalar field in the background of an
asymptotically flat static reflecting star is discussed. The scalar field is
assumed to be conformally coupled to the outside matter. The induced scalar
charge is determined and the required conditions to have regular field are
obtained. The ... | [
{
"created": "Mon, 15 Jul 2019 12:20:25 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Aug 2019 08:10:09 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Dec 2019 14:20:58 GMT",
"version": "v3"
},
{
"created": "Sat, 7 Dec 2019 19:39:01 GMT",
"version": "v4"
}
] | 2020-10-02 | [
[
"Sadjadi",
"H. Mohseni",
""
],
[
"Khodaei",
"M.",
""
]
] | The existence of a regular non-trivial scalar field in the background of an asymptotically flat static reflecting star is discussed. The scalar field is assumed to be conformally coupled to the outside matter. The induced scalar charge is determined and the required conditions to have regular field are obtained. The re... |
1007.1662 | Pierre-Philippe Dechant | Pierre-Philippe Dechant and Anthony N. Lasenby and Michael P. Hobson | Cracking the Taub-NUT | 39 pages, 15 figures, accepted by Classical and Quantum Gravity | Class.Quant.Grav.27:185010,2010 | 10.1088/0264-9381/27/18/185010 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present further analysis of an anisotropic, non-singular early universe
model that leads to the viable cosmology presented in Dechant et al
(arXiv:0809.4335). Although this model (the DLH model) contains scalar field
matter, it is reminiscent of the Taub-NUT vacuum solution in that it has
biaxial Bianchi IX geomet... | [
{
"created": "Fri, 9 Jul 2010 20:04:55 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Dechant",
"Pierre-Philippe",
""
],
[
"Lasenby",
"Anthony N.",
""
],
[
"Hobson",
"Michael P.",
""
]
] | We present further analysis of an anisotropic, non-singular early universe model that leads to the viable cosmology presented in Dechant et al (arXiv:0809.4335). Although this model (the DLH model) contains scalar field matter, it is reminiscent of the Taub-NUT vacuum solution in that it has biaxial Bianchi IX geometry... |
0911.5051 | Christian R\"over | Christian R\"over | Random template placement and prior information | Proceedings of the 8th Edoardo Amaldi Conference on Gravitational
Waves. 7 pages, 4 figures | J.Phys.Conf.Ser.228:012008,2010 | 10.1088/1742-6596/228/1/012008 | AEI-2009-115 | gr-qc physics.data-an | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In signal detection problems, one is usually faced with the task of searching
a parameter space for peaks in the likelihood function which indicate the
presence of a signal. Random searches have proven to be very efficient as well
as easy to implement, compared e.g. to searches along regular grids in
parameter space.... | [
{
"created": "Thu, 26 Nov 2009 10:46:07 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Dec 2009 19:29:23 GMT",
"version": "v2"
}
] | 2010-10-08 | [
[
"Röver",
"Christian",
""
]
] | In signal detection problems, one is usually faced with the task of searching a parameter space for peaks in the likelihood function which indicate the presence of a signal. Random searches have proven to be very efficient as well as easy to implement, compared e.g. to searches along regular grids in parameter space. K... |
0808.1083 | Robert T. Jantzen | Donato Bini, Robert T. Jantzen, Luigi Stella | The general relativistic Poynting-Robertson effect | 19 pages iop style, 8 eps figure files for 5 figures | Class.Quant.Grav.26:055009,2009 | 10.1088/0264-9381/26/5/055009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general relativistic version is developed for Robertson's discussion of
the Poynting-Robertson effect that he based on special relativity and Newtonian
gravity for point radiation sources like stars. The general relativistic model
uses a test radiation field of photons in outward radial motion with zero
angular m... | [
{
"created": "Thu, 7 Aug 2008 18:00:36 GMT",
"version": "v1"
}
] | 2009-02-20 | [
[
"Bini",
"Donato",
""
],
[
"Jantzen",
"Robert T.",
""
],
[
"Stella",
"Luigi",
""
]
] | The general relativistic version is developed for Robertson's discussion of the Poynting-Robertson effect that he based on special relativity and Newtonian gravity for point radiation sources like stars. The general relativistic model uses a test radiation field of photons in outward radial motion with zero angular mom... |
1403.7559 | Marcello Ortaggio | Marcello Ortaggio and Alena Pravdov\'a | Asymptotic behaviour of the Weyl tensor in higher dimensions | 32 pages. v2: added refs., corrected ref. [2] and a few typos (but
equations unchanged), added 2 summarizing tables, minor changes to match the
published version | Phys. Rev. D. 90, 104011 (2014) | 10.1103/PhysRevD.90.104011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the leading order fall-off behaviour of the Weyl tensor in
higher dimensional Einstein spacetimes (with and without a cosmological
constant) as one approaches infinity along a congruence of null geodesics. The
null congruence is assumed to "expand" in all directions near infinity (but it
is otherwise gen... | [
{
"created": "Fri, 28 Mar 2014 22:26:26 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Nov 2014 10:35:12 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Ortaggio",
"Marcello",
""
],
[
"Pravdová",
"Alena",
""
]
] | We determine the leading order fall-off behaviour of the Weyl tensor in higher dimensional Einstein spacetimes (with and without a cosmological constant) as one approaches infinity along a congruence of null geodesics. The null congruence is assumed to "expand" in all directions near infinity (but it is otherwise gener... |
1008.3670 | Joshua C. Long | D. Bennett, V. Skavysh, and J. Long | Search for Lorentz Violation in a Short-Range Gravity Experiment | Presented at the Fifth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, June 28-July 2, 2010 | null | 10.1142/9789814327688_0051 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An experimental test of the Newtonian inverse square law at short range has
been used to set limits on Lorentz violation in the pure gravity sector of the
Standard-Model Extension. On account of the planar test mass geometry,
nominally null with respect to inverse square forces, the limits derived for
the SME coeffic... | [
{
"created": "Sun, 22 Aug 2010 00:01:52 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Bennett",
"D.",
""
],
[
"Skavysh",
"V.",
""
],
[
"Long",
"J.",
""
]
] | An experimental test of the Newtonian inverse square law at short range has been used to set limits on Lorentz violation in the pure gravity sector of the Standard-Model Extension. On account of the planar test mass geometry, nominally null with respect to inverse square forces, the limits derived for the SME coefficie... |
2406.11564 | Carlos O. Lousto | Alessandro Ciarfella, James Healy, Carlos O. Lousto and Hiroyuki
Nakano | Quasicircular Orbital Parameters for Numerical Relativity Revisited | 13 pages, 4 figures, 3 tables | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the post-Newtonian (PN) expansion, we extend the determination of
quasicircular orbital parameters to be used by subsequent full numerical
simulations to the 3.5PN order, and find that this leads to lower
eccentricities, $e$, than with our previous method that used up to 3PN order.
We also supplement the computati... | [
{
"created": "Mon, 17 Jun 2024 14:02:00 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Ciarfella",
"Alessandro",
""
],
[
"Healy",
"James",
""
],
[
"Lousto",
"Carlos O.",
""
],
[
"Nakano",
"Hiroyuki",
""
]
] | In the post-Newtonian (PN) expansion, we extend the determination of quasicircular orbital parameters to be used by subsequent full numerical simulations to the 3.5PN order, and find that this leads to lower eccentricities, $e$, than with our previous method that used up to 3PN order. We also supplement the computation... |
0906.1551 | Yu-Huei Wu | Yu-Huei Wu and Chih-Hung Wang | Gravitational radiations of generic isolated horizons and non-rotating
dynamical horizons from asymptotic expansions | PRD, 15 pages | Phys.Rev.D80:063002,2009 | 10.1103/PhysRevD.80.063002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Instead of using a three dimensional analysis on quasi-local horizons, we
adopt a four dimensional asymptotic expansion analysis to study the next order
contributions from the nonlinearity of general relativity. From the similarity
between null infinity and horizons, the proper reference frames are chosen from
the co... | [
{
"created": "Mon, 8 Jun 2009 18:07:46 GMT",
"version": "v1"
}
] | 2009-10-02 | [
[
"Wu",
"Yu-Huei",
""
],
[
"Wang",
"Chih-Hung",
""
]
] | Instead of using a three dimensional analysis on quasi-local horizons, we adopt a four dimensional asymptotic expansion analysis to study the next order contributions from the nonlinearity of general relativity. From the similarity between null infinity and horizons, the proper reference frames are chosen from the comp... |
1912.12359 | Riccardo Sturani | Luc Blanchet, Stefano Foffa, Fran\c{c}ois Larrouturou, Riccardo
Sturani | Logarithmic tail contributions to the energy function of circular
compact binaries | 17 pages, 1 figure. 2 paragraphs added to sec. IV A in v2 | Phys. Rev. D 101, 084045 (2020) | 10.1103/PhysRevD.101.084045 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We combine different techniques to extract information about the logarithmic
contributions to the two-body conservative dynamics within the post-Newtonian
(PN) approximation of General Relativity. The logarithms come from the
conservative part of non linear gravitational-wave tails and their iterations.
Explicit, ori... | [
{
"created": "Fri, 27 Dec 2019 22:53:39 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jul 2020 02:57:33 GMT",
"version": "v2"
}
] | 2020-07-09 | [
[
"Blanchet",
"Luc",
""
],
[
"Foffa",
"Stefano",
""
],
[
"Larrouturou",
"François",
""
],
[
"Sturani",
"Riccardo",
""
]
] | We combine different techniques to extract information about the logarithmic contributions to the two-body conservative dynamics within the post-Newtonian (PN) approximation of General Relativity. The logarithms come from the conservative part of non linear gravitational-wave tails and their iterations. Explicit, origi... |
2310.06492 | Anisur Rahaman | Sohan Kumar Jha, Anisur Rahaman | Study of quasinormal modes, greybody bounds, and sparsity of Hawking
radiation within the metric-affine bumblebee gravity framework | 14 pages latex with 10 figures, few new amendment | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a static and spherically symmetric black hole metric that emerges
from the vacuum solution of the traceless metric-affine bumblebee model. Our
study focuses on the possible implications of the modifications induced by the
model on various astrophysical observables that include quasinormal modes,
ringdown ... | [
{
"created": "Tue, 10 Oct 2023 10:02:19 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Feb 2024 17:28:23 GMT",
"version": "v2"
}
] | 2024-02-05 | [
[
"Jha",
"Sohan Kumar",
""
],
[
"Rahaman",
"Anisur",
""
]
] | We consider a static and spherically symmetric black hole metric that emerges from the vacuum solution of the traceless metric-affine bumblebee model. Our study focuses on the possible implications of the modifications induced by the model on various astrophysical observables that include quasinormal modes, ringdown wa... |
2310.00884 | Ryuya Kudo | Kaisei Takahashi, Ryuya Kudo, Keita Takizawa, Hideki Asada | Equivalence between definitions of the gravitational deflection angle of
light for a stationary spacetime | 4 pages, 1 figure, text improved, accepted for PRD | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Gibbons-Werner-Ono-Ishihara-Asada method for gravitational lensing in a
stationary spacetime has been recently reexamined [Huang and Cao,
arXiv:2306.04145], in which the gravitational deflection angle of light based
on the Gauss-Bonnet theorem can be rewritten as a line integral of two
functions $H$ and $T$. The ... | [
{
"created": "Mon, 2 Oct 2023 04:00:27 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Nov 2023 06:03:25 GMT",
"version": "v2"
}
] | 2023-11-20 | [
[
"Takahashi",
"Kaisei",
""
],
[
"Kudo",
"Ryuya",
""
],
[
"Takizawa",
"Keita",
""
],
[
"Asada",
"Hideki",
""
]
] | The Gibbons-Werner-Ono-Ishihara-Asada method for gravitational lensing in a stationary spacetime has been recently reexamined [Huang and Cao, arXiv:2306.04145], in which the gravitational deflection angle of light based on the Gauss-Bonnet theorem can be rewritten as a line integral of two functions $H$ and $T$. The pr... |
1103.1597 | Muxin Han | You Ding, Muxin Han | On the Asymptotics of Quantum Group Spinfoam Model | 25 pages, 1 figure | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently a quantum group deformation of EPRL spinfoam model was proposed in
arXiv:1012.4216 by one of the authors, and in arXiv:1012.4784 by Fairbairn and
Meusburger. It is interesting to study the high spin asymptotics of the quantum
group spinfoam model, to see if it gives the discrete Einstein gravity with
cosmolo... | [
{
"created": "Tue, 8 Mar 2011 18:40:39 GMT",
"version": "v1"
}
] | 2011-03-09 | [
[
"Ding",
"You",
""
],
[
"Han",
"Muxin",
""
]
] | Recently a quantum group deformation of EPRL spinfoam model was proposed in arXiv:1012.4216 by one of the authors, and in arXiv:1012.4784 by Fairbairn and Meusburger. It is interesting to study the high spin asymptotics of the quantum group spinfoam model, to see if it gives the discrete Einstein gravity with cosmologi... |
1810.10657 | Mohammad Bagher Jahani Poshteh | Mohammad Bagher Jahani Poshteh, Robert B. Mann | Gravitational Lensing by Black Holes in Einsteinian Cubic Gravity | This is the final version that appeared in Phys. Rev. D | Phys. Rev. D 99, 024035 (2019) | 10.1103/PhysRevD.99.024035 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the predictions of Einsteinian Cubic Gravity (ECG) for the
lensing effects due to supermassive black holes at the center of Milky Way and
other galaxies. Working in the context of spherical symmetry, we obtain the
metric function from a continued fraction method and find that both time delays
and the a... | [
{
"created": "Thu, 25 Oct 2018 00:03:43 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jan 2019 15:54:11 GMT",
"version": "v2"
}
] | 2019-02-01 | [
[
"Poshteh",
"Mohammad Bagher Jahani",
""
],
[
"Mann",
"Robert B.",
""
]
] | We investigate the predictions of Einsteinian Cubic Gravity (ECG) for the lensing effects due to supermassive black holes at the center of Milky Way and other galaxies. Working in the context of spherical symmetry, we obtain the metric function from a continued fraction method and find that both time delays and the ang... |
1809.00259 | Shammi Tahura | Sharaban Tahura and Kent Yagi | Parameterized Post-Einsteinian Gravitational Waveforms in Various
Modified Theories of Gravity | 20 pages, 2 tables; v2: matches published version, updated abstract,
updated references; v3: PPE parameters in dCS gravity corrected | Phys. Rev. D 98, 084042 (2018) | 10.1103/PhysRevD.98.084042 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite the tremendous success of general relativity so far, modified
theories of gravity have received increased attention lately, motivated from
both theoretical and observational aspects. Gravitational wave observations
opened new possibilities for testing the viability of such theories in the
strong-field regime.... | [
{
"created": "Sat, 1 Sep 2018 22:15:25 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Nov 2018 04:56:41 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Dec 2019 22:32:11 GMT",
"version": "v3"
}
] | 2020-01-01 | [
[
"Tahura",
"Sharaban",
""
],
[
"Yagi",
"Kent",
""
]
] | Despite the tremendous success of general relativity so far, modified theories of gravity have received increased attention lately, motivated from both theoretical and observational aspects. Gravitational wave observations opened new possibilities for testing the viability of such theories in the strong-field regime. O... |
1707.08414 | Akira Matsumura | Akira Matsumura, Yasusada Nambu | Large scale quantum entanglement in de Sitter spacetime | 20 pages, 11 figures | Phys. Rev. D 98, 025004 (2018) | 10.1103/PhysRevD.98.025004 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate quantum entanglement between two symmetric spatialregions in
de Sitter space with the Bunch-Davies vacuum. As a discretized model of the
scalar field for numerical simulation, we consider a harmonic chain model.
Using the coarse-grained variables for the scalar field, it is shown that the
multipartite ... | [
{
"created": "Wed, 26 Jul 2017 12:55:22 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jul 2018 17:01:42 GMT",
"version": "v2"
}
] | 2018-07-12 | [
[
"Matsumura",
"Akira",
""
],
[
"Nambu",
"Yasusada",
""
]
] | We investigate quantum entanglement between two symmetric spatialregions in de Sitter space with the Bunch-Davies vacuum. As a discretized model of the scalar field for numerical simulation, we consider a harmonic chain model. Using the coarse-grained variables for the scalar field, it is shown that the multipartite en... |
1902.09643 | Damianos Iosifidis | Damianos Iosifidis | Metric-Affine Gravity and Cosmology/Aspects of Torsion and non-Metricity
in Gravity Theories | PhD Thesis, 270 pages, 1 figure | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This Thesis is devoted to the study of Metric-Affine Theories of Gravity and
Applications to Cosmology. The thesis is organized as follows. In the first
Chapter we define the various geometrical quantities that characterize a
non-Riemannian geometry. In the second Chapter we explore the MAG model
building. In Chapter... | [
{
"created": "Mon, 25 Feb 2019 22:26:53 GMT",
"version": "v1"
}
] | 2019-02-27 | [
[
"Iosifidis",
"Damianos",
""
]
] | This Thesis is devoted to the study of Metric-Affine Theories of Gravity and Applications to Cosmology. The thesis is organized as follows. In the first Chapter we define the various geometrical quantities that characterize a non-Riemannian geometry. In the second Chapter we explore the MAG model building. In Chapter 3... |
0904.4184 | Thomas M\"uller | Thomas Mueller, Frank Grave | Catalogue of Spacetimes | several new metrics added, introduction enhanced, Euler-Lagrangian
calculations added for some metrics | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Catalogue of Spacetimes is a collection of four-dimensional Lorentzian
spacetimes in the context of the General Theory of Relativity (GR). The aim of
the catalogue is to give a quick reference for students who need some basic
facts of the most well-known spacetimes in GR.
| [
{
"created": "Mon, 27 Apr 2009 15:40:14 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Nov 2009 16:43:32 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Nov 2010 15:19:57 GMT",
"version": "v3"
}
] | 2010-11-13 | [
[
"Mueller",
"Thomas",
""
],
[
"Grave",
"Frank",
""
]
] | The Catalogue of Spacetimes is a collection of four-dimensional Lorentzian spacetimes in the context of the General Theory of Relativity (GR). The aim of the catalogue is to give a quick reference for students who need some basic facts of the most well-known spacetimes in GR. |
2207.10096 | Johannes Noller | Ian Harry, Johannes Noller | Probing the speed of gravity with LVK, LISA, and joint observations | 12 pages + appendices and references, 5 figures; v3: minor
clarifications added, matches published version | GRG 54, 133 (2022) | 10.1007/s10714-022-03016-0 | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Theories of dark energy that affect the speed of gravitational waves $c_{\rm
GW}$ on cosmological scales naturally lead to a frequency-dependent transition
of that speed close to the LIGO/Virgo/KAGRA (LVK) band. While observations such
as GW170817 assure us that $c_{\rm GW}$ is extremely close to the speed of
light i... | [
{
"created": "Wed, 20 Jul 2022 18:00:02 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2022 15:33:08 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Oct 2022 16:41:23 GMT",
"version": "v3"
}
] | 2022-10-27 | [
[
"Harry",
"Ian",
""
],
[
"Noller",
"Johannes",
""
]
] | Theories of dark energy that affect the speed of gravitational waves $c_{\rm GW}$ on cosmological scales naturally lead to a frequency-dependent transition of that speed close to the LIGO/Virgo/KAGRA (LVK) band. While observations such as GW170817 assure us that $c_{\rm GW}$ is extremely close to the speed of light in ... |
2102.10483 | Subham Roy Mr. | Avijit Mukherjee, Subham B Roy | Birkhoffs Theorem and Lie Symmetry Analysis | null | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Three dimensional space is said to be spherically symmetric if it admits
SO(3) as the group of isometries. Under this symmetry condition, the Einsteins
Field equations for vacuum, yields the Schwarzschild Metric as the unique
solution, which essentially is the statement of the well known Birkhoffs
Theorem. Geometrica... | [
{
"created": "Sun, 21 Feb 2021 00:47:22 GMT",
"version": "v1"
}
] | 2021-02-23 | [
[
"Mukherjee",
"Avijit",
""
],
[
"Roy",
"Subham B",
""
]
] | Three dimensional space is said to be spherically symmetric if it admits SO(3) as the group of isometries. Under this symmetry condition, the Einsteins Field equations for vacuum, yields the Schwarzschild Metric as the unique solution, which essentially is the statement of the well known Birkhoffs Theorem. Geometricall... |
gr-qc/0508082 | Fabrizio Canfora | F. Canfora | A note on Tachyon dynamics | 11 pages, no figures, to be published on Physics Letters B | Phys.Lett. B625 (2005) 277-284 | 10.1016/j.physletb.2005.08.063 | null | gr-qc hep-th | null | A suitable splitting of tachyon field equation is able to disclose non
trivial properties of Born-Infeld (some known, some unexpected) and Polyakov
actions; the tachyon equation also can be analyzed in some detail. The analysis
displays an intriguing connection between sine-Gordon theory and some crucial
issues such ... | [
{
"created": "Sat, 20 Aug 2005 06:32:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Canfora",
"F.",
""
]
] | A suitable splitting of tachyon field equation is able to disclose non trivial properties of Born-Infeld (some known, some unexpected) and Polyakov actions; the tachyon equation also can be analyzed in some detail. The analysis displays an intriguing connection between sine-Gordon theory and some crucial issues such as... |
1705.09047 | Chongoh Lee | Chong Oh Lee | Configurational entropy of charged AdS black holes | 6 pages, 4 figures, typos corrected, version to appear in PLB | null | 10.1016/j.physletb.2017.07.013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When we consider charged AdS black holes in higher dimensional spacetime and
a molecule number density along coexistence curves is numerically extended to
higher dimensional cases. It is found that a number density difference of a
small and large black holes decrease as a total dimension grows up. In
particular, we f... | [
{
"created": "Thu, 25 May 2017 05:05:10 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Jul 2017 07:29:21 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Lee",
"Chong Oh",
""
]
] | When we consider charged AdS black holes in higher dimensional spacetime and a molecule number density along coexistence curves is numerically extended to higher dimensional cases. It is found that a number density difference of a small and large black holes decrease as a total dimension grows up. In particular, we fin... |
gr-qc/9910005 | Chris Isham | C.J. Isham and J.Butterfield | Some Possible Roles for Topos Theory in Quantum Theory and Quantum
Gravity | Submitted to {\em Foundations of Physics} for an issue in honour of
Marisa Dalla Chiara.} Based on a lecture given by CJI at the conference {\em
Towards a New Understanding of Space, Time and Matter}, University of British
Columbia, Canada (1999) | Found.Phys.30:1707-1735,2000 | 10.1023/A:1026406502316 | Imperial/TP/98-99/76 | gr-qc quant-ph | null | We discuss some ways in which topos theory (a branch of category theory) can
be applied to interpretative problems in quantum theory and quantum gravity. In
Section 1, we introduce these problems. In Section 2, we introduce topos
theory, especially the idea of a topos of presheaves. In Section 3, we discuss
several p... | [
{
"created": "Sat, 2 Oct 1999 13:39:57 GMT",
"version": "v1"
}
] | 2011-04-20 | [
[
"Isham",
"C. J.",
""
],
[
"Butterfield",
"J.",
""
]
] | We discuss some ways in which topos theory (a branch of category theory) can be applied to interpretative problems in quantum theory and quantum gravity. In Section 1, we introduce these problems. In Section 2, we introduce topos theory, especially the idea of a topos of presheaves. In Section 3, we discuss several pos... |
gr-qc/9304026 | John D. Brown | David Brown | Action functionals for relativistic perfect fluids | 40 pages, plain TeX | Class.Quant.Grav.10:1579-1606,1993 | 10.1088/0264-9381/10/8/017 | null | gr-qc | null | Action functionals describing relativistic perfect fluids are presented. Two
of these actions apply to fluids whose equations of state are specified by
giving the fluid energy density as a function of particle number density and
entropy per particle. Other actions apply to fluids whose equations of state
are specifie... | [
{
"created": "Mon, 19 Apr 1993 19:44:44 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Brown",
"David",
""
]
] | Action functionals describing relativistic perfect fluids are presented. Two of these actions apply to fluids whose equations of state are specified by giving the fluid energy density as a function of particle number density and entropy per particle. Other actions apply to fluids whose equations of state are specified ... |
1108.2009 | Yosef Zlochower | Carlos O. Lousto, Yosef Zlochower | Hangup Kicks: Still Larger Recoils by Partial Spin/Orbit Alignment of
Black-Hole Binaries | 4 pages, 3 figures, revtex 4, references fixed. To appear in PRL | Phys. Rev. Lett. 107, 231102 (2011) | 10.1103/PhysRevLett.107.231102 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the scenario of the gravitational radiation recoil acquired by the
final remnant of a black-hole-binary merger by studying a set of configurations
that have components of the spin both aligned with the orbital angular momentum
and in the orbital plane. We perform a series of 42 new full numerical
simulatio... | [
{
"created": "Tue, 9 Aug 2011 18:51:41 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Sep 2011 17:58:43 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Sep 2011 22:28:20 GMT",
"version": "v3"
},
{
"created": "Fri, 18 Nov 2011 12:45:53 GMT",
"version": "v4"
}
] | 2011-12-13 | [
[
"Lousto",
"Carlos O.",
""
],
[
"Zlochower",
"Yosef",
""
]
] | We revisit the scenario of the gravitational radiation recoil acquired by the final remnant of a black-hole-binary merger by studying a set of configurations that have components of the spin both aligned with the orbital angular momentum and in the orbital plane. We perform a series of 42 new full numerical simulations... |
2003.10331 | Grigory Volovik | G.E. Volovik | Varying Newton constant and black hole to white hole quantum tunneling | 5 pages, no figures, revised after referee report, new section is
added | Universe 6, 133 (2020) | 10.3390/universe6090133 | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamics of black holes is discussed for the case, when the Newton
constant $G$ is not a constant, but is the thermodynamic variable. This gives
for the first law of the Schwarzschild black hole thermodynamics:
$dS_\text{BH}= -AdK + \frac{dM}{T_\text{BH}}$, where the gravitational coupling
$K=1/4G$, $M$ is ... | [
{
"created": "Mon, 23 Mar 2020 15:29:02 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Mar 2020 19:02:20 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Apr 2020 07:40:35 GMT",
"version": "v3"
},
{
"created": "Sat, 25 Apr 2020 10:38:18 GMT",
"version": "v4"
},
{
"cr... | 2020-09-02 | [
[
"Volovik",
"G. E.",
""
]
] | The thermodynamics of black holes is discussed for the case, when the Newton constant $G$ is not a constant, but is the thermodynamic variable. This gives for the first law of the Schwarzschild black hole thermodynamics: $dS_\text{BH}= -AdK + \frac{dM}{T_\text{BH}}$, where the gravitational coupling $K=1/4G$, $M$ is th... |
1109.3177 | Orlando Luongo | Alejandro Aviles, Luca Bonanno, Orlando Luongo, Hernando Quevedo | Holographic dark matter and dark energy with second order invariants | 12 figures, revtex style | Phys. Rev. D 84, 103520, (2011) | 10.1103/PhysRevD.84.103520 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the main goals of modern cosmology remains to summon up a self
consistent policy, able to explain, in the framework of the Einstein's theory,
the cosmic speed up and the presence of Dark Matter in the Universe.
Accordingly to the Holographic principle, which postulates the existence of a
minimal size of a phys... | [
{
"created": "Wed, 14 Sep 2011 19:38:03 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Nov 2011 18:06:50 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Aviles",
"Alejandro",
""
],
[
"Bonanno",
"Luca",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Quevedo",
"Hernando",
""
]
] | One of the main goals of modern cosmology remains to summon up a self consistent policy, able to explain, in the framework of the Einstein's theory, the cosmic speed up and the presence of Dark Matter in the Universe. Accordingly to the Holographic principle, which postulates the existence of a minimal size of a physic... |
1408.3111 | Sajid Ali | Ibrar Hussain, Sajid Ali | Effect of quintessence on the energy of the Reissner-Nordstrom black
hole | 12 pages, 2 figures | General Relativity and Gravitation March 2015, 47:34 | 10.1007/s10714-015-1883-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy content of the Reissner-Nordstrom black hole surrounded by
quintessence is investigated using approximate Lie symmetry methods. It is
mainly done by assuming mass and charge of the black hole as small quantities
($\epsilon$), and by retaining its second power in the perturbed geodesic
equations for such bl... | [
{
"created": "Wed, 13 Aug 2014 07:10:04 GMT",
"version": "v1"
}
] | 2015-03-23 | [
[
"Hussain",
"Ibrar",
""
],
[
"Ali",
"Sajid",
""
]
] | The energy content of the Reissner-Nordstrom black hole surrounded by quintessence is investigated using approximate Lie symmetry methods. It is mainly done by assuming mass and charge of the black hole as small quantities ($\epsilon$), and by retaining its second power in the perturbed geodesic equations for such blac... |
2302.07250 | Cillian Rew | C.Rew and W.E.V. Barker | The effective inflationary potential of constant-torsion emergent
gravity | 15 pages, 7 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Constant-torsion emergent gravity (CTEG) has a Lagrangian quadratic in
curvature and torsion, but without any Einstein--Hilbert term. CTEG is
motivated by a unitary, power-counting renormalisable particle spectrum. The
timelike axial torsion adopts a vacuum expectation value, and the Friedmann
cosmology emerges dynam... | [
{
"created": "Tue, 14 Feb 2023 18:46:01 GMT",
"version": "v1"
}
] | 2023-02-15 | [
[
"Rew",
"C.",
""
],
[
"Barker",
"W. E. V.",
""
]
] | Constant-torsion emergent gravity (CTEG) has a Lagrangian quadratic in curvature and torsion, but without any Einstein--Hilbert term. CTEG is motivated by a unitary, power-counting renormalisable particle spectrum. The timelike axial torsion adopts a vacuum expectation value, and the Friedmann cosmology emerges dynamic... |
gr-qc/9611005 | Marco `BRONI` Bruni | M. Bruni, H. van Elst, C. Uggla | Singularities in Silent Universes: State of the Art | 6 papes, Proceedings of the 12th Italian Conference of General
Relativity and Gravitational Physics, style included | null | null | IC/96/223, SISSA--160/96/A | gr-qc astro-ph | null | After a brief overview of the so-called silent models and their present
status, we consider the subclass of Bianchi Type--I models with a magnetic
field source. Due to the presence of the magnetic field, the initial
singularity shows ``oscillatory'' features reminiscent of the Bianchi Type--IX
case. The Bianchi Type-... | [
{
"created": "Mon, 4 Nov 1996 17:11:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bruni",
"M.",
""
],
[
"van Elst",
"H.",
""
],
[
"Uggla",
"C.",
""
]
] | After a brief overview of the so-called silent models and their present status, we consider the subclass of Bianchi Type--I models with a magnetic field source. Due to the presence of the magnetic field, the initial singularity shows ``oscillatory'' features reminiscent of the Bianchi Type--IX case. The Bianchi Type--I... |
2012.02548 | Valeriy Obukhov | V. V. Obukhov | Separation of variables in Hamilton-Jacobi and Klein-Gordon-Fock
equations for a charged test particle in the Stackel spaces of type (1.1) | The article will be published in IJGMMP | null | 10.1142/S0219887821500365 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All equivalence classes for electromagnetic potentials and space-time metrics
of Stackel spaces, provided that Hamilton-Jacobi equation and Klein-Gordon-Fock
equation for a charged test particle can be integrated by the method of
complete separation of variables are found. The separation is carried out using
the comp... | [
{
"created": "Fri, 4 Dec 2020 12:07:53 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Dec 2020 10:14:15 GMT",
"version": "v2"
}
] | 2021-03-31 | [
[
"Obukhov",
"V. V.",
""
]
] | All equivalence classes for electromagnetic potentials and space-time metrics of Stackel spaces, provided that Hamilton-Jacobi equation and Klein-Gordon-Fock equation for a charged test particle can be integrated by the method of complete separation of variables are found. The separation is carried out using the comple... |
1908.05707 | Stephen Fairhurst | Stephen Fairhurst, Rhys Green, Charlie Hoy, Mark Hannam, Alistair Muir | Two-harmonic approximation for gravitational waveforms from precessing
binaries | 23 pages, 9 figures. Accepted for publication in PRD | Phys. Rev. D 102, 024055 (2020) | 10.1103/PhysRevD.102.024055 | LIGO-P1900225 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary-black-hole orbits precess when the black-hole spins are mis-aligned
with the binary's orbital angular momentum. The apparently complicated dynamics
can in most cases be described as simple precession of the orbital angular
momentum about an approximately fixed total angular momentum. However, the
imprint of th... | [
{
"created": "Thu, 15 Aug 2019 18:54:37 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jul 2020 09:46:17 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"Fairhurst",
"Stephen",
""
],
[
"Green",
"Rhys",
""
],
[
"Hoy",
"Charlie",
""
],
[
"Hannam",
"Mark",
""
],
[
"Muir",
"Alistair",
""
]
] | Binary-black-hole orbits precess when the black-hole spins are mis-aligned with the binary's orbital angular momentum. The apparently complicated dynamics can in most cases be described as simple precession of the orbital angular momentum about an approximately fixed total angular momentum. However, the imprint of the ... |
gr-qc/0506029 | Matt Visser | Matt Visser (Victoria University of Wellington) and Silke Weinfurtner
(Victoria University of Wellington) | Massive Klein--Gordon equation from a BEC-based analogue spacetime | V1: 10 pages; uses revtex4; V2: two references and brief comments
added | Phys.Rev. D72 (2005) 044020 | 10.1103/PhysRevD.72.044020 | null | gr-qc | null | We extend the "analogue spacetime" programme by investigating a
condensed-matter system that is in principle capable of simulating the massive
Klein--Gordon equation in curved spacetime. Since many elementary particles
have mass, this is an essential step in building realistic analogue models, and
a first step toward... | [
{
"created": "Mon, 6 Jun 2005 07:28:13 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jun 2005 08:48:39 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
],
[
"Weinfurtner",
"Silke",
"",
"Victoria University of Wellington"
]
] | We extend the "analogue spacetime" programme by investigating a condensed-matter system that is in principle capable of simulating the massive Klein--Gordon equation in curved spacetime. Since many elementary particles have mass, this is an essential step in building realistic analogue models, and a first step towards ... |
0811.2524 | Hernando Quevedo | Hernando Quevedo and Alberto Sanchez | Geometric description of BTZ black holes thermodynamics | null | Phys.Rev.D79:024012,2009 | 10.1103/PhysRevD.79.024012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the properties of the space of thermodynamic equilibrium states of
the Ba\~nados-Teitelboim-Zanelli (BTZ) black hole in (2+1)-gravity. We use the
formalism of geometrothermodynamics to introduce in the space of equilibrium
states a $2-$dimensional thermodynamic metric whose curvature is non-vanishing,
indica... | [
{
"created": "Sat, 15 Nov 2008 20:08:03 GMT",
"version": "v1"
}
] | 2009-01-21 | [
[
"Quevedo",
"Hernando",
""
],
[
"Sanchez",
"Alberto",
""
]
] | We study the properties of the space of thermodynamic equilibrium states of the Ba\~nados-Teitelboim-Zanelli (BTZ) black hole in (2+1)-gravity. We use the formalism of geometrothermodynamics to introduce in the space of equilibrium states a $2-$dimensional thermodynamic metric whose curvature is non-vanishing, indicati... |
1004.4549 | Yi Xie | Xin Wu (Nanchang University) and Yi Xie (Nanjing University) | Symplectic structure of post-Newtonian Hamiltonian for spinning compact
binaries | 7 pages, no fig. | Phys.Rev.D81:084045,2010 | 10.1103/PhysRevD.81.084045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The phase space of a Hamiltonian system is symplectic. However, the
post-Newtonian Hamiltonian formulation of spinning compact binaries in existing
publications does not have this property, when position, momentum and spin
variables $[X, P, S_1, S_2]$ compose its phase space. This may give a
convenient application of... | [
{
"created": "Mon, 26 Apr 2010 15:14:42 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Wu",
"Xin",
"",
"Nanchang University"
],
[
"Xie",
"Yi",
"",
"Nanjing University"
]
] | The phase space of a Hamiltonian system is symplectic. However, the post-Newtonian Hamiltonian formulation of spinning compact binaries in existing publications does not have this property, when position, momentum and spin variables $[X, P, S_1, S_2]$ compose its phase space. This may give a convenient application of p... |
1501.01749 | Taeyoon Moon | Yun Soo Myung and Taeyoon Moon | Scale-invariant tensor spectrum from conformal gravity | 1+9 pages, no figure, version to appear in Mod. Phys. Lett. A | null | 10.1142/S0217732315501722 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study cosmological tensor perturbations generated during de Sitter
inflation in the conformal gravity with mass parameter $m^2=2H^2$. It turns out
that tensor power spectrum is scale-invariant.
| [
{
"created": "Thu, 8 Jan 2015 07:30:13 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jul 2015 08:45:05 GMT",
"version": "v2"
}
] | 2015-10-21 | [
[
"Myung",
"Yun Soo",
""
],
[
"Moon",
"Taeyoon",
""
]
] | We study cosmological tensor perturbations generated during de Sitter inflation in the conformal gravity with mass parameter $m^2=2H^2$. It turns out that tensor power spectrum is scale-invariant. |
2105.00965 | Vittorio De Falco Dr | Vittorio De Falco, William Borrelli | Timescales of the chaos onset in the general relativistic
Poynting-Robertson effect | 11 pages; 4 figures; 3 tables; accepted for publication on PRD | null | 10.1103/PhysRevD.103.124012 | null | gr-qc astro-ph.HE hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | It has been proved that the general relativistic Poynting-Robertson effect in
the equatorial plane of Kerr metric shows a chaotic behavior for a suitable
range of parameters. As a further step, we calculate the timescale for the
onset of chaos through the Lyapunov exponents, estimating how this trend
impacts on the o... | [
{
"created": "Mon, 3 May 2021 16:01:22 GMT",
"version": "v1"
}
] | 2021-06-16 | [
[
"De Falco",
"Vittorio",
""
],
[
"Borrelli",
"William",
""
]
] | It has been proved that the general relativistic Poynting-Robertson effect in the equatorial plane of Kerr metric shows a chaotic behavior for a suitable range of parameters. As a further step, we calculate the timescale for the onset of chaos through the Lyapunov exponents, estimating how this trend impacts on the obs... |
1109.4377 | Jorma Louko | Lee Hodgkinson, Jorma Louko | How often does the Unruh-DeWitt detector click beyond four dimensions? | 30 pages. v3: presentational improvement. Published version | J. Math. Phys. 53, 082301 (2012) | 10.1063/1.4739453 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the response of an arbitrarily-accelerated Unruh-DeWitt detector
coupled to a massless scalar field in Minkowski spacetimes of dimensions up to
six, working within first-order perturbation theory and assuming a smooth
switch-on and switch-off. We express the total transition probability as a
manifestly fin... | [
{
"created": "Tue, 20 Sep 2011 17:42:30 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Oct 2011 17:42:56 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Aug 2012 15:57:22 GMT",
"version": "v3"
}
] | 2012-08-07 | [
[
"Hodgkinson",
"Lee",
""
],
[
"Louko",
"Jorma",
""
]
] | We analyse the response of an arbitrarily-accelerated Unruh-DeWitt detector coupled to a massless scalar field in Minkowski spacetimes of dimensions up to six, working within first-order perturbation theory and assuming a smooth switch-on and switch-off. We express the total transition probability as a manifestly finit... |
gr-qc/9605001 | Euejin Jeong | Eue Jin Jeong | Extracting Gravitational Energy From The Homogeneous Isotropic Universe | Latex, 6 pages | null | null | null | gr-qc | null | The kinetic energy of a local system of objects placed in a curved spacetime
is gained by the subsequent acceleration of the object following the more
contracted region of spacetime. Normally this happens near massive gravitating
stars. However, the gravitational dipole moment has been shown to be capable of
self cre... | [
{
"created": "Wed, 1 May 1996 09:10:46 GMT",
"version": "v1"
},
{
"created": "Sat, 4 May 1996 08:38:33 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Jeong",
"Eue Jin",
""
]
] | The kinetic energy of a local system of objects placed in a curved spacetime is gained by the subsequent acceleration of the object following the more contracted region of spacetime. Normally this happens near massive gravitating stars. However, the gravitational dipole moment has been shown to be capable of self creat... |
2307.13255 | Omar Mustafa | Omar. Mustafa, Faizuddin Ahmed | A note on "The Klein-Gordon oscillator in (1+2)-dimensions G\"urses
space-time backgrounds (Ann. Phys. (N. Y.) 404 (2019) 1)" | 4 pages | Ann. Phys. 457 (2023) 169424 | 10.1016/j.aop.2023.169424 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revisit and discuss the KG-oscillator in the $(1+2)$-dimensional
G\"{u}rses space-time studied in (F. Ahmed, Ann. Phys. (N. Y.) 404 (2019) 1).
The modified oscillator frequency {\it i.e.,}
$\tilde{\omega}^{2}=(\Omega^{2}\,E^{2}+\eta^{2})$ appeared in the eigenvalue
equation is an energy-dependent parameter, and co... | [
{
"created": "Tue, 25 Jul 2023 04:53:44 GMT",
"version": "v1"
}
] | 2023-07-26 | [
[
"Mustafa",
"Omar.",
""
],
[
"Ahmed",
"Faizuddin",
""
]
] | We revisit and discuss the KG-oscillator in the $(1+2)$-dimensional G\"{u}rses space-time studied in (F. Ahmed, Ann. Phys. (N. Y.) 404 (2019) 1). The modified oscillator frequency {\it i.e.,} $\tilde{\omega}^{2}=(\Omega^{2}\,E^{2}+\eta^{2})$ appeared in the eigenvalue equation is an energy-dependent parameter, and cons... |
2003.10969 | David Kofro\v{n} | David Kofro\v{n} | Point particles and Appell's solutions on the axis of Kerr black hole
for arbitrary spin in terms of the Debye potentials | 11 pages | Search Results Web results Phys. Rev. D 101, 064027 (2020) | 10.1103/PhysRevD.101.064027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Teukolsky master equation -- a fundamental equation for test fields of
any spin, or perturbations, in type D spacetimes -- is classically treated in
its separated form. Then the solutions representing even the simplest sources
-- point particles -- are expressed in terms of series. The only known
exception is a s... | [
{
"created": "Tue, 24 Mar 2020 16:54:52 GMT",
"version": "v1"
}
] | 2020-04-01 | [
[
"Kofroň",
"David",
""
]
] | The Teukolsky master equation -- a fundamental equation for test fields of any spin, or perturbations, in type D spacetimes -- is classically treated in its separated form. Then the solutions representing even the simplest sources -- point particles -- are expressed in terms of series. The only known exception is a sta... |
gr-qc/0504012 | Edward Porter | Neil J. Cornish and Edward K. Porter | Detecting Galactic Binaries with LISA | 7 pages-2 figures. One figure added and typos corrected. Accepted for
the proceedings of GWDAW 9, special edition of Classical and Quantum Gravity | Class.Quant.Grav. 22 (2005) S927-S934 | 10.1088/0264-9381/22/18/S06 | null | gr-qc | null | One of the main sources of gravitational waves for the LISA space-borne
interferometer are galactic binary systems. The waveforms for these sources are
represented by eight parameters, of which four are extrinsic, and four are
intrinsic to the system. Geometrically, these signals exist in an 8-d parameter
space. By c... | [
{
"created": "Mon, 4 Apr 2005 18:41:16 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Aug 2005 21:07:22 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Cornish",
"Neil J.",
""
],
[
"Porter",
"Edward K.",
""
]
] | One of the main sources of gravitational waves for the LISA space-borne interferometer are galactic binary systems. The waveforms for these sources are represented by eight parameters, of which four are extrinsic, and four are intrinsic to the system. Geometrically, these signals exist in an 8-d parameter space. By cal... |
1911.12329 | Michael Coughlin | M. Coughlin, J. Harms, D.C. Bowden, P. Meyers, V.C. Tsai, V. Mandic,
G. Pavlis, and T. Prestegard | Coherence-based approaches for estimating the composition of the seismic
wavefield | null | Journal of Geophysical Research: Solid Earth, 124, 2941-2956, 2019 | 10.1029/2018JB016608 | null | gr-qc physics.geo-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As new techniques exploiting the Earth's ambient seismic noise field are
developed and applied, such as for the observation of temporal changes in
seismic velocity structure, it is crucial to quantify the precision with which
wave-type measurements can be made. This work uses array data at the Homestake
mine in Lead,... | [
{
"created": "Wed, 27 Nov 2019 18:15:05 GMT",
"version": "v1"
}
] | 2019-11-28 | [
[
"Coughlin",
"M.",
""
],
[
"Harms",
"J.",
""
],
[
"Bowden",
"D. C.",
""
],
[
"Meyers",
"P.",
""
],
[
"Tsai",
"V. C.",
""
],
[
"Mandic",
"V.",
""
],
[
"Pavlis",
"G.",
""
],
[
"Prestegard",
"T.",
... | As new techniques exploiting the Earth's ambient seismic noise field are developed and applied, such as for the observation of temporal changes in seismic velocity structure, it is crucial to quantify the precision with which wave-type measurements can be made. This work uses array data at the Homestake mine in Lead, S... |
gr-qc/0302034 | Nikolaos Stergioulas | Nikolaos Stergioulas | Rotating Stars in Relativity | 101 pages, 18 figures. The full online-readable version of this
article, including several animations, will be published in Living Reviews in
Relativity at http://www.livingreviews.org/ | LivingRev.Rel.6:3,2003 | 10.12942/lrr-2003-3 | AUTH-LR2003 | gr-qc astro-ph | null | Rotating relativistic stars have been studied extensively in recent years,
both theoretically and observationally, because of the information one could
obtain about the equation of state of matter at extremely high densities and
because they are considered to be promising sources of gravitational waves. The
latest th... | [
{
"created": "Mon, 10 Feb 2003 16:14:57 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Stergioulas",
"Nikolaos",
""
]
] | Rotating relativistic stars have been studied extensively in recent years, both theoretically and observationally, because of the information one could obtain about the equation of state of matter at extremely high densities and because they are considered to be promising sources of gravitational waves. The latest theo... |
1204.3421 | Stefan Hollands | Stefan Hollands | Black hole uniqueness theorems and new thermodynamic identities in
eleven dimensional supergravity | 50pp, 3 figures, v2: references added, correction in appendix B,
conclusions added, v3: reference section edited, typos removed, minor changes
in appendix D | null | 10.1088/0264-9381/29/20/205009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider stationary, non-extremal black holes in 11-dimensional
supergravity having isometry group $\mathbb{R} \times U(1)^8$. We prove that
such a black hole is uniquely specified by its angular momenta, its electric
charges associated with the various 7-cycles in the manifold, together with
certain moduli and ve... | [
{
"created": "Mon, 16 Apr 2012 09:37:31 GMT",
"version": "v1"
},
{
"created": "Thu, 24 May 2012 09:48:19 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Aug 2012 11:59:23 GMT",
"version": "v3"
}
] | 2015-06-04 | [
[
"Hollands",
"Stefan",
""
]
] | We consider stationary, non-extremal black holes in 11-dimensional supergravity having isometry group $\mathbb{R} \times U(1)^8$. We prove that such a black hole is uniquely specified by its angular momenta, its electric charges associated with the various 7-cycles in the manifold, together with certain moduli and vect... |
2308.05197 | Juan M. Z\'arate Pretel | Juan M. Z. Pretel, Takol Tangphati and Ayan Banerjee | Relativistic structure of charged quark stars in energy-momentum squared
gravity | 15 pages, 6 figures, 2 tables. Version accepted in Annals of Physics | Ann. Phys. 458 (2023) 169440 | 10.1016/j.aop.2023.169440 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the context of energy-momentum squared gravity (EMSG), where
non-linear matter contributions appear in the gravitational action, we derive
the modified TOV equations describing the hydrostatic equilibrium of charged
compact stars. We adopt two different choices for the matter Lagrangian density
($\mathcal{L}_m... | [
{
"created": "Wed, 9 Aug 2023 19:34:41 GMT",
"version": "v1"
}
] | 2023-08-21 | [
[
"Pretel",
"Juan M. Z.",
""
],
[
"Tangphati",
"Takol",
""
],
[
"Banerjee",
"Ayan",
""
]
] | Within the context of energy-momentum squared gravity (EMSG), where non-linear matter contributions appear in the gravitational action, we derive the modified TOV equations describing the hydrostatic equilibrium of charged compact stars. We adopt two different choices for the matter Lagrangian density ($\mathcal{L}_m= ... |
gr-qc/9906045 | Arbab I. Arbab | Arbab I. Arbab | FRW-Type Universe With Vacuum Energy Density | A revised version, 8 pages Latex, submitted to Gravitation and
Cosmology | Grav.Cosmol. 8 (2002) 227-231 | null | null | gr-qc | null | We have considered a cosmological model with a cosmological constant of the
form $\Lambda=3\alpha\frac{\dot R^2}{R^2}+\bt\frac{\ddot R}{R} \alpha, \bt=\rm
const.$ The cosmological constant is found to decrease as $t^{-2}$ and the rate
of particle creation is smaller than the Steady State value. We have found that
thi... | [
{
"created": "Mon, 14 Jun 1999 22:06:05 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jun 1999 16:03:32 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Oct 1999 13:01:34 GMT",
"version": "v3"
},
{
"created": "Thu, 24 May 2001 13:39:30 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Arbab",
"Arbab I.",
""
]
] | We have considered a cosmological model with a cosmological constant of the form $\Lambda=3\alpha\frac{\dot R^2}{R^2}+\bt\frac{\ddot R}{R} \alpha, \bt=\rm const.$ The cosmological constant is found to decrease as $t^{-2}$ and the rate of particle creation is smaller than the Steady State value. We have found that this ... |
1812.00435 | Tosaporn Angsachon | T.Angsachon, P.Cheewaphutthisakun, R.Dhanawittayapol, S.N.Manida | The Killing vectors and symmetry in $R$-spacetime | Latex, 13 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the Killing vector will be constructed for the $R$-spacetime
metric. The symmetry transformations corresponding to this vectors are obtained
explicitly. Their coincidence with the transformations of the Poincar\'e group
in a small neighborhood of the world point is shown.
| [
{
"created": "Sun, 2 Dec 2018 17:56:08 GMT",
"version": "v1"
}
] | 2018-12-04 | [
[
"Angsachon",
"T.",
""
],
[
"Cheewaphutthisakun",
"P.",
""
],
[
"Dhanawittayapol",
"R.",
""
],
[
"Manida",
"S. N.",
""
]
] | In this paper, the Killing vector will be constructed for the $R$-spacetime metric. The symmetry transformations corresponding to this vectors are obtained explicitly. Their coincidence with the transformations of the Poincar\'e group in a small neighborhood of the world point is shown. |
1603.07360 | Hyerim Noh | Jai-chan Hwang, Hyerim Noh, J'ulio Fabris, Oliver F. Piattella,
Winfried Zimdahl | Newtonian hydrodynamic equations with relativistic pressure and velocity | 4 pages, no figure | null | 10.1088/1475-7516/2016/07/046 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new approximation to include fully general relativistic pressure
and velocity in Newtonian hydrodynamics. The energy conservation, momentum
conservation and two Poisson's equations are consistently derived from
Einstein's gravity in the zero-shear gauge assuming weak gravity and
action-at-a-distance limi... | [
{
"created": "Wed, 16 Mar 2016 08:44:03 GMT",
"version": "v1"
}
] | 2016-08-03 | [
[
"Hwang",
"Jai-chan",
""
],
[
"Noh",
"Hyerim",
""
],
[
"Fabris",
"J'ulio",
""
],
[
"Piattella",
"Oliver F.",
""
],
[
"Zimdahl",
"Winfried",
""
]
] | We present a new approximation to include fully general relativistic pressure and velocity in Newtonian hydrodynamics. The energy conservation, momentum conservation and two Poisson's equations are consistently derived from Einstein's gravity in the zero-shear gauge assuming weak gravity and action-at-a-distance limit.... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.