Keresztes, Zoltán and Gergely, Árpád László and AY, Kamenshchik and V, Gorini and D, Polarski (2013) Soft singularity crossing and transformation of matter properties. PHYSICAL REVIEW D, 88 (2). ISSN 2470-0010
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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.
Item Type: | Article |
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Uncontrolled Keywords: | UNIVERSE; HUBBLE-SPACE-TELESCOPE; CHAPLYGIN-GAS; COSMIC STRINGS; |
Subjects: | Q Science / természettudomány > QC Physics / fizika |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 25 Jun 2024 14:11 |
Last Modified: | 25 Jun 2024 14:11 |
URI: | https://real.mtak.hu/id/eprint/198691 |
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