The Origin of Black Hole Entropy in String Theory

TL;DR

This paper reviews recent progress in string theory where the quantum states associated with black holes are counted, providing a statistical explanation for black hole entropy consistent with thermodynamics.

Contribution

It identifies and counts the quantum states of string theory related to black holes, establishing a direct link between microscopic states and macroscopic entropy.

Findings

Number of quantum states matches exponential of Bekenstein-Hawking entropy

Provides statistical origin for black hole thermodynamics

Supports string theory as a candidate for quantum gravity

Abstract

I review some recent work in which the quantum states of string theory which are associated with certain black holes have been identified and counted. For large black holes, the number of states turns out to be precisely the exponential of the Bekenstein-Hawking entropy. This provides a statistical origin for black hole thermodynamics in the context of a potential quantum theory of gravity.