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. We discuss and compare also different approaches to the problem of crossing of the Big Bang–Big Crunch singularities.
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This work was partially supported by the RFBR Grant No. 17-02-01008.
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Kamenshchik, A.Y. Singularity Crossing, Transformation of Matter Properties and the Problem of Parametrization in Field Theories. Found Phys 48, 1159–1176 (2018). https://doi.org/10.1007/s10701-018-0161-4
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DOI: https://doi.org/10.1007/s10701-018-0161-4