Entropy Production in the Cosmological Amplification of the Vacuum Fluctuations

TL;DR

This paper estimates the entropy generated by squeezed cosmic gravitons during the universe's expansion, proposing that vacuum pair production could account for the universe's large entropy.

Contribution

It introduces a method to estimate entropy from squeezed gravitons and links vacuum pair production to the universe's entropy.

Findings

Entropy from squeezed gravitons is significant.

Vacuum pair production may explain the universe's large entropy.

Abstract

We estimate the entropy associated to a background of squeezed cosmic gravitons, and we argue that the process of cosmological pair production from the vacuum may explain the large amount of entropy of our present universe.