Black Holes and Spacetime Physics in String/M Theory

TL;DR

This paper reviews recent advances in black hole physics within string/M theory, highlighting noncommutative horizons, fuzzy AdS2 models, and their implications for understanding quantum gravity's nonperturbative aspects.

Contribution

It introduces a fuzzy AdS2 model as a toy for black hole horizons, capturing key nonperturbative quantum gravity features and discussing noncommutative horizons in string/M theory.

Findings

Fuzzy AdS2 models replicate nonperturbative quantum gravity features

't Hooft's S-matrix ansatz implies noncommutative horizons

Black hole quantum physics insights inform spacetime structure

Abstract

In addition to briefly reviewing recent progress in studying black hole physics in string/M theory, we describe several robust features pertaining to spacetime physics that one can glean by studying quantum physics of black holes. In particular, we review 't Hooft's S-matrix ansatz which results in a noncommutative horizon. A recent construction of fuzzy AdS2 is emphasized, this is a nice toy model for fuzzy black hole horizon. We demonstrate that this model captures some nonperturbative features of quantum gravity.