If you want to cross singularity, wrap it!

TL;DR

This paper explores how wrapping membranes or strings around black hole singularities in higher dimensions can effectively 'wrap' or bypass the singularity, suggesting a potential mechanism for singularity resolution in string theory.

Contribution

It proposes a novel mechanism where wrapped membranes or strings can extend beyond black hole singularities, offering insights into singularity resolution in higher-dimensional string theory.

Findings

Wrapped membranes appear to disappear into the singularity from an external observer's perspective.

The continuation of trajectories beyond the singularity suggests a re-emergence as space-like strings.

Effective strings from wrapped membranes can extend beyond the classical singularity, indicating a possible resolution mechanism.

Abstract

In two-dimensional string theory, a probe D0-brane does not see the black hole singularity due to a cancellation between its metric coupling and the dilaton coupling. A similar mechanism may work in the Schwarzschild black hole in large $D$ dimensions by considering a suitable wrapped membrane. From the asymptotic observer, the wrapped membrane looks disappearing into nothing while the continuation of the time-like trajectory beyond the singularity suggests that it would reappear as an instantaneous space-like string stretching from the singularity. A null trajectory can be extended to a null trajectory beyond the singularity. Not only the effective particle but an effective string from the wrapped membrane can exhibit the same feature.