Counterrotational effects on stability of 2+1-dimensional thin-shell wormholes

TL;DR

This paper investigates how counterrotation affects the stability of 2+1-dimensional rotating thin-shell wormholes, finding that counterrotation can enhance stability under certain conditions but may lead to instability under perturbations.

Contribution

It provides new insights into the stability of rotating thin-shell wormholes with counterrotating shells, highlighting the stabilizing effect of counterrotation in this context.

Findings

Counterrotation increases stability of the wormhole.

Small velocity perturbations can destabilize the wormhole.

Counterrotating shells support the wormhole structure more effectively.

Abstract

The role of angular momentum in a 2+1-dimensional rotating thin-shell wormhole (TSW) is considered. Particular emphasis is made on stability when the shells (rings) are counterrotating. We find that counter-rotating halves make the TSW supported by the equation of state of a linear gas more stable. Under a small velocity dependent perturbation, however, it becomes unstable.