Remarks on Black Hole Degrees of Freedom in String Theory

TL;DR

This paper discusses how black hole entropy can be understood as quantum degrees of freedom on the horizon, providing evidence within string theory that infalling strings contribute to horizon degrees of freedom.

Contribution

It offers new insights into black hole entropy by linking quantum degrees of freedom to horizon projections in string theory.

Findings

Infalling strings increase quantum entropy at the horizon.

Black hole entropy can be interpreted as horizon degrees of freedom.

Supports the idea that horizon states encode black hole microstates.

Abstract

The Bekenstein-Hawking black hole area entropy law suggests that the quantum degrees of freedom of black holes may be realized as projections of quantum states unto the event horizon of the black hole. In this paper, we provide further evidence for this interpretation in the context of string theory. In particular, we argue that increase in the quantum entropy due to the capture of infalling fundamental strings appears in the form of horizon degrees of freedom.