Black Holes of Negative Mass

TL;DR

This paper explores the theoretical possibility that negative energy regions can collapse into black holes with negative mass, involving complex topology changes in quantum gravity.

Contribution

It introduces the concept that negative energy density regions can form black holes with negative mass, highlighting the role of topology change in quantum gravity.

Findings

Negative energy regions can undergo gravitational collapse.

Resultant black holes can have negative mass.

Topology-changing processes are relevant in quantum gravity.

Abstract

I demonstrate that, under certain circumstances, regions of negative energy density can undergo gravitational collapse into a black hole. The resultant exterior black hole spacetimes necessarily have negative mass and non-trivial topology. A full theory of quantum gravity, in which topology-changing processes take place, could give rise to such spacetimes.