From wormhole to black hole with negative mass
Phys. Rev. D 113, 044032 – Published 10 February, 2026
DOI: https://doi.org/10.1103/9h7h-686p
Abstract
We construct new black holes using the curvature-induced scalarization mechanism in Einstein gravity coupled to a massless phantom scalar. We find that the general wormhole solutions with independent scalar charge can turn into a black hole with secondary scalar hair that is a function of the mass only. The long-range force between the two identical black holes can be attractive, zero, or repulsive, depending on the mass/scalar charge relation. Furthermore, the black hole mass can be negative. Our finding suggests that exotic matter responsible for wormholes can also lead to exotic black holes.
