Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Ifigeneia Klaoudatou"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 8, Pp 1-15 (2021)
Abstract We construct a regular five-dimensional brane-world with localised gravity on a flat 3-brane. The matter content in the bulk is parametrised by an analog of a non-linear fluid with equation of state $$p=\gamma \rho ^\lambda $$ p = γ ρ λ b
Externí odkaz:
https://doaj.org/article/2c3f4a70e1354a6998635faa6eea22a5
Publikováno v:
Astronomy. 1:17-35
We discuss qualitative features of the conformal relation between certain classes of gravity theories and general relativity, common to different themes such as $f(R)$, Brans-Dicke-type, and string theories. We focus primarily on the frame relations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd47d018b22bdf1dd1e1834b08b25e63
https://doi.org/10.3390/astronomy1010004
https://doi.org/10.3390/astronomy1010004
Publikováno v:
European Physical Journal C: Particles and Fields
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2021, 81 (8), pp.771. ⟨10.1140/epjc/s10052-021-09558-y⟩
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 81, Iss 8, Pp 1-15 (2021)
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2021, 81 (8), pp.771. ⟨10.1140/epjc/s10052-021-09558-y⟩
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 81, Iss 8, Pp 1-15 (2021)
We construct a regular five-dimensional brane-world with localised gravity on a flat 3-brane. The matter content in the bulk is parametrised by an analog of a non-linear fluid with equation of state $p=\gamma\rho^\lambda$ between the `pressure' $p$ a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c02fe7485dd4e43f0ee18db3b49c7f8
https://hal.archives-ouvertes.fr/hal-03286855
https://hal.archives-ouvertes.fr/hal-03286855
Publikováno v:
European Physical Journal C
Eur.Phys.J.C
Eur.Phys.J.C, 2016, 76 (9), pp.511. ⟨10.1140/epjc/s10052-016-4353-9⟩
Eur.Phys.J.C, 2016, 76 (9), pp.511. 〈10.1140/epjc/s10052-016-4353-9〉
Antoniadis, Ignatios; Cotsakis, Spiros; Klaoudatou, Ifigeneia (2016). Curved branes with regular support. European physical journal. C-particles and fields, 76(9), p. 511. EDP Sciences 10.1140/epjc/s10052-016-4353-9
European Physical Journal C: Particles and Fields
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2016, 76 (9), pp.511. ⟨10.1140/epjc/s10052-016-4353-9⟩
Eur.Phys.J.C
Eur.Phys.J.C, 2016, 76 (9), pp.511. ⟨10.1140/epjc/s10052-016-4353-9⟩
Eur.Phys.J.C, 2016, 76 (9), pp.511. 〈10.1140/epjc/s10052-016-4353-9〉
Antoniadis, Ignatios; Cotsakis, Spiros; Klaoudatou, Ifigeneia (2016). Curved branes with regular support. European physical journal. C-particles and fields, 76(9), p. 511. EDP Sciences 10.1140/epjc/s10052-016-4353-9
European Physical Journal C: Particles and Fields
European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2016, 76 (9), pp.511. ⟨10.1140/epjc/s10052-016-4353-9⟩
We study spacetime singularities in a general five-dimensional braneworld with curved branes satisfying four-dimensional maximal symmetry. The bulk is supported by an analog of perfect fluid with the time replaced by the extra coordinate. We show tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfc77bc639c08eadc46390e8db61073e
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Autor:
Spiros Cotsakis, Ifigeneia Klaoudatou
Publikováno v:
Journal of Geometry and Physics. 57:1303-1312
We consider the problem of describing the asymptotic behaviour of \textsc{FRW} universes near their spacetime singularities in general relativity. We find that the Bel-Robinson energy of these universes in conjunction with the Hubble expansion rate a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9de70eefd850b4cf901fd1b777cd38bc
https://doi.org/10.1016/j.geomphys.2006.10.007
https://doi.org/10.1016/j.geomphys.2006.10.007
Publikováno v:
The Thirteenth Marcel Grossmann Meeting.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d8872db8870090e4c234917c989a813
https://doi.org/10.1142/9789814623995_0299
https://doi.org/10.1142/9789814623995_0299
Autor:
Spiros Cotsakis, Ifigeneia Klaoudatou
Publikováno v:
Journal of Geometry and Physics. 55:306-315
We show that globally and regularly hyperbolic future geodesically incomplete isotropic universes, except for the standard all-encompassing `big crunch', can accommodate singularities of only one kind, namely, those having a non-integrable Hubble par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfbb625918043f540adbbf2f2ec52cf6
https://doi.org/10.1016/j.geomphys.2004.12.012
https://doi.org/10.1016/j.geomphys.2004.12.012
Publikováno v:
The European Physical Journal. C, Particles and Fields
European Physical Journal C
European Physical Journal C
The existence of envelopes is studied for systems of differential equations in connection with the method of asymptotic splittings which allows to determine the singularity structure of the solutions. The result is applied to braneworlds consisting o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::934ee40439a4672cc1338c58de9f0da7
By extending previous analysis of the authors, a systematic study of the singularity structure and possible asymptotic behaviors of five-dimensional braneworld solutions is performed in the case where the bulk is a mixture of an analog of perfect flu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e503957efc8a89eec79455d93166af8
http://arxiv.org/abs/1206.0090
http://arxiv.org/abs/1206.0090
Publikováno v:
Class. Quantum Gravity, (2010) pp. 235018
The singularity structure and the corresponding asymptotic behavior of a 3-brane coupled to a scalar field or to a perfect fluid in a five-dimensional bulk is analyzed in full generality using the method of asymptotic splittings. In the case of the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abf53861245ba00bc1b709554383ca2e