Minimal conditions for the creation of a Friedman-Robertson-Walker universe from a "bounce"

Details Minimal conditions for the creation of a Friedman-Robertson-Walker universe from a "bounce" Minimal conditions for the creation of a Friedman-Robertson-Walker universe from a "bounce"

1998-10-07

arxiv.org/abs/gr-qc/9810023v1

Phys.Lett. B455 (1999) 90-95

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, ReV-TeX 3.1

Scientific paper

10.1016/S0370-2693(99)00469-4

We investigate the minimal conditions under which the creation of our universe might arise due to a "bounce" from a previous collapse, rather than an explosion from a big-bang singularity. Such a bounce is sometimes referred to as a Tolman wormhole. We subject the bounce to a general model-independent analysis along the lines of that applied to the Morris-Thorne traversable wormholes, and show that there is always an open temporal region surrounding the bounce over which the strong energy condition (SEC) must be violated. On the other hand, all the other energy conditions can easily be satisfied. In particular, we exhibit an inflation-inspired model in which a big bounce is "natural".

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