Quantum Squeezing and Cosmological Entropy Production

TL;DR

This paper links quantum squeezing during cosmological pair production to entropy growth, suggesting that early universe processes could account for a significant portion of current cosmic entropy.

Contribution

It demonstrates that entropy production in cosmology is governed by squeezing parameters and is largely independent of initial particle numbers.

Findings

Entropy growth is determined by squeezing parameters.

Total entropy can match current cosmic entropy levels.

Entropy production is linked to Planck-scale metric changes.

Abstract

The entropy growth in a cosmological process of pair production is completely determined by the associated squeezing parameter, and is insensitive to the number of particles in the initial state. The total produced entropy may represent a significant fraction of the entropy stored today in the cosmic black-body radiation, provided pair production originates from a change in the background metric at a curvature scale of the Planck order.