From pre- to post-big bang: an (almost) self-dual cosmological history

M. Gasperini

From pre- to post-big bang: an (almost) self-dual cosmological history

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arxiv 2106.12865 v1 pith:LRICBDPO submitted 2021-06-24 hep-th astro-ph.COgr-qc

M. Gasperini This is my paper · ORCID

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keywords bangcosmologicalstringalmostapproachingasymptoticallybouncebouncing

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We present a short introduction to a non-standard cosmological scenario motivated by the duality symmetries of string theory, in which the big bang singularity is replaced with a "big bounce" at high but finite curvature. The bouncing epoch is prepared by a long (possibly infinitely extended) phase of cosmic evolution, starting from an initial state asymptotically approaching the string perturbative vacuum.

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Pre-Big-Bang Cosmology Cannot Explain NANOGrav 15-year Signal
astro-ph.CO 2024-11 conditional novelty 4.0 of 10

Pre-Big Bang string cosmology cannot explain the NANOGrav 15-year signal; a power-law spectrum is preferred by a Bayes factor of about 468.

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