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Phase space analysis of the accelerating multifluid Universe

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dc.contributor.author Odintsov S.
dc.contributor.author Oikonomou V.
dc.contributor.author Tretyakov P.
dc.date.accessioned 2018-04-05T07:10:44Z
dc.date.available 2018-04-05T07:10:44Z
dc.date.issued 2017
dc.identifier.issn 2470-0010
dc.identifier.uri http://dspace.kpfu.ru/xmlui/handle/net/130646
dc.description.abstract © 2017 American Physical Society. We study in detail the phase space of a Friedmann-Robertson-Walker universe filled with various cosmological fluids that may or may not interact. We use various expressions for the equation of state, and we analyze the physical significance of the resulting fixed points. In addition, we discuss the effects of the stability or an instability of some fixed points. Moreover, we study an interesting phenomenological scenario for which there is an oscillating interaction between the dark energy and dark matter fluid. As we demonstrate, in the context of the model we use, at early times the interaction is negligible, and it starts to grow as the cosmic time approaches the late-time era. Also the cosmological dynamical system is split into two distinct dynamical systems that have two distinct de Sitter fixed points, with the early-time de Sitter point being unstable. This framework gives an explicit example of the unification of the early-time with late-time acceleration. Finally, we discuss in some detail the physical interpretation of the various models we present in this work.
dc.relation.ispartofseries Physical Review D
dc.title Phase space analysis of the accelerating multifluid Universe
dc.type Article
dc.relation.ispartofseries-issue 4
dc.relation.ispartofseries-volume 96
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS24700010-2017-96-4-SID85029127595

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  • Публикации сотрудников КФУ Scopus [17617]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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