Semiclassical zero temperature black holes in spherically reduced theories

TL;DR

This paper numerically investigates semiclassical zero temperature black hole solutions in spherically symmetric Einstein-Maxwell-dilaton theories, analyzing their near-horizon structure and comparing with minimally coupled cases.

Contribution

It provides the first detailed numerical analysis of zero temperature black holes in spherically reduced Einstein-Maxwell-dilaton models, highlighting differences from minimally coupled scenarios.

Findings

Zero temperature solutions exist in the studied models.

Near-horizon behavior differs from minimally coupled cases.

Numerical methods effectively analyze semiclassical black holes.

Abstract

We numerically integrate the semiclassical equations of motion for spherically symmetric Einstein-Maxwell theory with a dilaton coupled scalar field and look for zero temperature configurations. The solution we find is studied in detail close to the horizon and comparison is made with the corresponding one in the minimally coupled case.