Comment on "Quantum versus classical instability of scalar fields in curved backgrounds"

TL;DR

This paper critiques a previous claim by demonstrating that the assertion of no instability for a minimally coupled scalar field in a static spherically symmetric background is incorrect, highlighting the need for reevaluation of that claim.

Contribution

It provides a counterargument to prior work, showing that the previous conclusion about the stability of scalar fields in such backgrounds is flawed.

Findings

The previous claim of no instability is incorrect.

Scalar fields can exhibit instability in static spherically symmetric backgrounds.

Reevaluation of stability conditions is necessary for accurate physical models.

Abstract

I show that the claim of the paper [arXiv:1310.2185] on the absence of instability for a minimally coupled scalar field on a static spherically symmetric gravitational background is incorrect.