The entropy of Hawking radiation

In this review, we describe recent progress on the black hole information\nproblem that involves a new understanding of how to calculate the entropy of\nHawking radiation. We show how the method for computing gravitational\nfine-grained entropy, developed over the past 15 years, can be extended to\ncapture the entropy of Hawking radiation. This technique reveals large\ncorrections needed for the entropy to be consistent with unitary black hole\nevaporation.\n