Soft singularity crossing and transformation of matter properties

Z. Keresztes, L. Gergely, Alexander Yu Kamenshchik, Vittorio Gorini, David Polarski

Research output: Contribution to journalArticle

30 Citations (Scopus)

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.

Original languageEnglish
Article number023535
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume88
Issue number2
DOIs
Publication statusPublished - Jul 31 2013

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tachyons
dust
fluids
gases

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Soft singularity crossing and transformation of matter properties. / Keresztes, Z.; Gergely, L.; Kamenshchik, Alexander Yu; Gorini, Vittorio; Polarski, David.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 88, No. 2, 023535, 31.07.2013.

Research output: Contribution to journalArticle

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