Stress tensor for extreme 2D dilatonic Reissner-Nordstrom black holes

TL;DR

This paper computes the stress-energy tensor for a massless scalar field in a 2D extremal Reissner-Nordstrom black hole spacetime, demonstrating its regularity at the horizon, which is significant for understanding quantum effects in black hole physics.

Contribution

It provides the first explicit calculation of the stress tensor for a dilaton-coupled scalar field on an extremal black hole formed by collapse, confirming regularity at the horizon.

Findings

Stress tensor is regular at the horizon.

Supports the stability of extremal black holes.

Advances understanding of quantum fields in black hole backgrounds.

Abstract

We calculate the expectation value of the stress energy tensor for a massless dilaton-coupled 2D scalar field propagating on an extremal Reissner-Nordstrom black hole formed by the collapse of a timelike shell, showing its regularity on the horizon.