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Sailing through the big crunch-big bang transition

Author(s): Bars, Itzhak; Steinhardt, Paul J.; Turok, Neil

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Abstract: In a recent series of papers, we have shown that theories with scalar fields coupled to gravity (e.g., the standard model) can be lifted to a Weyl-invariant equivalent theory in which it is possible to unambiguously trace the classical cosmological evolution through the transition from big crunch to big bang. The key was identifying a sufficient number of finite, Weyl-invariant conserved quantities to uniquely match the fundamental cosmological degrees of freedom across the transition. In doing so we had to account for the well-known fact that many Weyl-invariant quantities diverge at the crunch and bang. Recently, some authors rediscovered a few of these divergences and concluded based on their existence alone that the theories cannot be geodesically complete. In this paper, we show that this conclusion is invalid. Using conserved quantities we explicitly construct the complete set of geodesics and show that they pass continuously through the big crunch-big bang transition.
Publication Date: 15-Mar-2014
Electronic Publication Date: 5-Mar-2014
Citation: Bars, Itzhak, Steinhardt, Paul, Turok, Neil. (2014). Sailing through the big crunch-big bang transition. PHYSICAL REVIEW D, 89, doi:10.1103/PhysRevD.89.061302
DOI: doi:10.1103/PhysRevD.89.061302
ISSN: 1550-7998
EISSN: 1550-2368
Type of Material: Journal Article
Journal/Proceeding Title: PHYSICAL REVIEW D
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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