Geometric Resolution of Schwarzschild Horizon

TL;DR

This paper presents a geometric transition in eleven-dimensional supergravity that smooths out the Schwarzschild black hole into a microstructured spacetime supported by M2-brane flux, revealing new microstate geometries.

Contribution

It provides the first explicit example of a geometric resolution of Schwarzschild horizon into a smooth microstructure in higher-dimensional supergravity.

Findings

Resolution occurs at an infinitesimal scale above the horizon.

The smooth microstructure is supported by M2-brane flux.

The geometry matches a Schwarzschild scalarwall in four dimensions.

Abstract

We provide the first example of a geometric transition that resolves the Schwarzschild black hole into a smooth microstructure in eleven-dimensional supergravity on a seven-torus. The geometry is indistinguishable from a Schwarzschild black hole dressed with a scalar field in four dimensions, referred to as a Schwarzschild scalarwall. In eleven dimensions, the scalar field arises as moduli of the torus. The resolution occurs at an infinitesimal scale above the horizon, where it transitions to a smooth bubbling spacetime supported by M2-brane flux.