On the Entropy Increase in the Black Hole Formation

TL;DR

This paper explores the entropy increase during black hole formation, interpreting it as a temperature decrease linked to volume expansion, and relates black hole entropy to microscopic statistical states.

Contribution

It provides a new interpretation of black hole entropy increase as a consequence of volume expansion and connects microscopic states to an enlarged phase space.

Findings

Entropy increases significantly during collapse

Black hole entropy relates to microscopic statistical states

Temperature decreases as volume increases

Abstract

The entropy increases enormously when a star collapses into a black hole. This entropy increase is interpreted as the decrease of the temperature due to the increase of the volume. Through these investigation the microscopic states of the black hole entropy is naturally understood as the statistical states of the enlarged phase space.