The entropy of Hawking radiation

TL;DR

This paper reviews recent advances in calculating the entropy of Hawking radiation, highlighting how new methods reveal corrections necessary for consistent, unitary black hole evaporation.

Contribution

It extends gravitational fine-grained entropy techniques to accurately compute Hawking radiation entropy, addressing the black hole information paradox.

Findings

Large corrections are required for entropy to match unitarity

The method improves understanding of black hole evaporation

Progress in resolving the black hole information problem

Abstract

In this review, we describe recent progress on the black hole information problem that involves a new understanding of how to calculate the entropy of Hawking radiation. We show how the method for computing gravitational fine-grained entropy, developed over the past 15 years, can be extended to capture the entropy of Hawking radiation. This technique reveals large corrections needed for the entropy to be consistent with unitary black hole evaporation.