Dynamical Formation of Charged Wormholes

TL;DR

This paper presents a theoretical model for the formation of charged traversable wormholes from black holes, involving Einstein-Maxwell equations and null dust, with implications for understanding wormhole genesis.

Contribution

It introduces a new dynamical scenario for charged wormhole formation from black holes using impulsive null shells and null dust support.

Findings

Wormhole throat radius depends on initial black hole and shell parameters.

The spacetime transitions from black hole to wormhole via Vaidya regions.

The model demonstrates a plausible formation process for charged wormholes.

Abstract

We construct static, spherically symmetric, charged traversable wormhole solutions to the Einstein--Maxwell equations, supported by bidirectional (ingoing and outgoing) null dust with negative energy, and discuss a scenario for their dynamical formation from a black hole. Our solution contains a traversable throat, where the areal radius takes a minimum, although the spacetime is not asymptotically flat. In our formation scenario, the spacetime evolves sequentially from a black hole to Vaidya regions and finally to a wormhole, with each transition mediated by an impulsive null shell. We find that the radius of the wormhole throat is determined by the mass and charge of the initial black hole as well as those of the injected shell.