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23 April 2024 |
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Article overview
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Soft singularity crossing and transformation of matter properties | | Zoltán Keresztes
; László Á. Gergely
; Alexander Yu. Kamenshchik
; Vittorio Gorini
; David Polarski
; | | Date: |
23 Apr 2013 | | Abstract: | We investigate particular cosmological models, based either on tachyon fields
or on perfect fluids, for which soft future singularities arise in a natural
way. Our main result is the description of a smooth crossing of the soft
singularity in models with an anti-Chaplygin gas or with a particular tachyon
field in the presence of dust. Such a crossing is made possible by certain
transformations of matter properties. Some of these cosmological evolutions
involving tachyons are compatible with SNIa data. We compute numerically their
dynamics involving a first soft singularity crossing, a turning point and a
second soft singulatity crossing during recollapse, ending in a Big Crunch
singularity. | | Source: | arXiv, 1304.6355 | | Services: | Forum | Review | PDF | Favorites | |
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