Inside the degenerate horizons of regular black holes

TL;DR

This paper analyzes the behavior of the quantized stress-energy tensor of various fields inside the degenerate horizon of regular charged black holes in (anti-)de Sitter space, revealing significant intermediate region effects.

Contribution

It constructs and examines the regularized stress-energy tensor inside degenerate horizons of regular charged black holes in (anti-)de Sitter space, highlighting oscillatory behavior and regional variations.

Findings

Stress-energy tensor components are small near the horizon and center.

Large, oscillatory stress-energy tensor in the intermediate region.

Behavior influenced by higher curvature responses to metric changes.

Abstract

The regularized stress-energy tensor of the quantized massive scalar, spinor and vector fields inside the degenerate horizon of the regular charged black hole in the (anti-)de Sitter universe is constructed and examined. It is shown that although the components of the stress-energy tensor are small in the vicinity of the black hole degenerate horizon and near the regular center, they are quite big in the intermediate region. The oscillatory character of the stress-energy tensor can be ascribed to various responses of the higher curvature terms to the changes of the metric inside the (degenerate) event horizon, especially in the region adjacent to the region described by the nearly flat metric potentials. Special emphasis is put on the stress-energy tensor in the geometries being the product of the constant curvature two-dimensional subspaces.