Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Georgia Kittou"'
Autor:
John D. Barrow, Georgia Kittou
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 2, Pp 1-8 (2020)
Abstract We investigate the case of two interacting fluids in homogeneous and isotropic cosmologies with a non-linear interaction term. The interaction term avoids the unrealistic form generally used in the literature, beginning with Tolman, in which
Externí odkaz:
https://doaj.org/article/45834d17238345b1b46bfb4918dcb247
Autor:
Georgia Kittou
Publikováno v:
Physics Letters B, Vol 785, Iss , Pp 621-625 (2018)
We study the asymptotic dynamics of dark energy as a mixture of presssureless matter and an interacting vacuum component. We find that the only dynamics compatible with current observational data favours an asymptotically vanishing matter-vacuum ener
Externí odkaz:
https://doaj.org/article/5a2ee33c512a4b8a8b927891e6a088ef
Publikováno v:
Filomat. 35:1915-1925
Oscillation and nonoscillation theories play very important roles in gaining information about the long-time behavior of solutions of a system. Therefore, we investigate the asymptotic behavior of nonoscillatory solutions as well as the existence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74eb0504775de45fdc3b871c1d590ae9
https://doi.org/10.2298/fil2106915o
https://doi.org/10.2298/fil2106915o
Autor:
Georgia Kittou
Σε αυτή την εργασία εξετάζουμε τον δυναμικό χαρακτήρα κοσμολογικών ιδιομορφιών που αναφύονται σε επίπεδους και καμπυλωμένους χωροχρόν
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14b35278f1bfb19baca016dd788af49b
https://doi.org/10.12681/eadd/36172
https://doi.org/10.12681/eadd/36172
Autor:
John D. Barrow, Georgia Kittou
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 2, Pp 1-8 (2020)
European Physical Journal
European Physical Journal
Funder: Science and Technology Facilities Council; doi: http://dx.doi.org/10.13039/501100000271
We investigate the case of two interacting fluids in homogeneous and isotropic cosmologies with a non-linear interaction term. The interaction term a
We investigate the case of two interacting fluids in homogeneous and isotropic cosmologies with a non-linear interaction term. The interaction term a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2df3cc4165b8a6b0e36978a04c2c3eb
http://arxiv.org/abs/1907.06410
http://arxiv.org/abs/1907.06410
Autor:
Georgia Kittou
We apply the central extension technique of Poincare to dynamics involving an interacting mixture of pressureless matter and vacuum near a finite-time singularity. We show that the only attractor solution on the circle of infinity is the one describi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::886b4cbaa8c8b73d0fc0cb6daacd0f47
Autor:
Georgia Kittou, Spiros Cotsakis
Publikováno v:
Physical Review D. 88
We study curved isotropic cosmologies filled with two interacting fluids near their time singularities. We find that a number of these universes asymptote to flat limits in the sense that their asymptotic properties become indistinguishable from thos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adbcde6ef91b60a3349f3a7ef88b7c92
https://doi.org/10.1103/physrevd.88.083514
https://doi.org/10.1103/physrevd.88.083514
Autor:
Spiros Cotsakis, Georgia Kittou
We find various asymptotic limits of universes containing two interacting fluids which interact and exchange energy. We study the finite-time singularities that may develop in these cosmologies and obtain the asymptotic behaviours of the solutions ne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4569e925f92b57210b376d1e0676fe8