Entropy, Black holes, and the New Cyclic Universe

TL;DR

This paper explores a cyclic universe model where entropy and black holes evolve through non-singular bounces, allowing for endless cycles without chaotic behavior, and aligning with observed cosmological conditions.

Contribution

It introduces a cyclic universe scenario with smooth bounces that prevent singularities and explain entropy partitioning consistent with cosmological observations.

Findings

Entropy partitions into matter-radiation and gravitational sectors after each bounce.

The universe can undergo infinite cycles without chaotic mixmaster behavior.

The model aligns with Weyl curvature conditions for observational consistency.

Abstract

We track the evolution of entropy and black holes in a cyclic universe that undergoes repeated intervals of expansion followed by slow contraction and a smooth (non-singular) bounce. In this kind of cyclic scenario, there is no big crunch and no chaotic mixmaster behavior. We explain why the entropy following each bounce is naturally partitioned into near-maximal entropy in the matter-radiation sector and near-minimal in the gravitational sector, satisfying the Weyl curvature conditions conjectured to be essential for a cosmology consistent with observations. As a result, this kind of cyclic universe can undergo an unbounded number of cycles in the past and/or the future.