Deflation at Turnaround for Oscillatory Cosmology

Details Deflation at Turnaround for Oscillatory Cosmology Deflation at Turnaround for Oscillatory Cosmology

2006-08-06

arxiv.org/abs/astro-ph/0608138v1

Astronomy and Astrophysics

Astrophysics

11 pages latex

Scientific paper

It is suggested that dark energy in a brane world can help reconcile an infinitely cyclic cosmology with the second law of thermodynamics. A cyclic cosmology is described, in which dark energy with constant equation of state leads to a turnaround at finite future time, when entropy is decreased by a huge factor equal to the inverse of its enhancement during the initial inflation. Thermodynamic consistency of cyclicity requires the arrow of time to reverse during contraction. Entropy reduction in the contracting phase is infinitesimally smaller than entropy increase during expansion.

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