dc.contributor.author |
Balakin A. |
|
dc.contributor.author |
Bochkarev V. |
|
dc.date.accessioned |
2018-09-18T20:23:31Z |
|
dc.date.available |
2018-09-18T20:23:31Z |
|
dc.date.issued |
2011 |
|
dc.identifier.issn |
1550-7998 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/139390 |
|
dc.description.abstract |
We establish a new self-consistent model in order to explain from a unified viewpoint two key features of the cosmological evolution: the inflation in the early Universe and the late-time accelerated expansion. The key element of this new model is the Archimedean-type coupling of the dark matter with dark energy, which form the so-called cosmic dark fluid. We suppose that dark matter particles immersed into the dark energy reservoir are affected by the force proportional to the four-gradient of the dark energy pressure. The Archimedean-type coupling is shown to play a role of effective energy-momentum redistributor between the dark matter and the dark energy components of the dark fluid, thus providing the Universe evolution to be a quasiperiodic and/or multistage process. In the first part of the work we discuss a theoretical base and new exact solutions of the model master equations. Special attention is focused on the exact solutions, for which the scale factor is presented by the anti-Gaussian function: these solutions describe the late-time acceleration and are characterized by a nonsingular behavior in the early Universe. The second part contains qualitative and numerical analysis of the master equations; we focus there on the solutions describing a multi-inflationary Universe. © 2011 The American Physical Society. |
|
dc.relation.ispartofseries |
Physical Review D - Particles, Fields, Gravitation and Cosmology |
|
dc.title |
Archimedean-type force in a cosmic dark fluid. I. Exact solutions for the late-time accelerated expansion |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
2 |
|
dc.relation.ispartofseries-volume |
83 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.source.id |
SCOPUS15507998-2011-83-2-SID79551538228 |
|