Instability of nonminimally coupled scalar fields in the spacetime of thin charged shells

Understand

We investigate the stability of a free scalar field nonminimally coupled to gravity under linear perturbations in the spacetime of a charged spherical shell.

• Our analysis is performed in the context of quantum field theory in curved spacetimes.
• This paper completes previous analyses which considered the exponential enhancement of vacuum fluctuations in the spacetime of massive shells.