Charged BTZ-like Black Holes in Higher Dimensions

TL;DR

This paper generalizes (2+1)-dimensional BTZ black holes to higher dimensions, analyzing their geometric, thermodynamic, and stability properties, and finds they exhibit similar features and stability across the phase space.

Contribution

It introduces higher-dimensional BTZ-like solutions, demonstrating their similarities to original BTZ black holes and analyzing their thermodynamic stability.

Findings

BTZ-like solutions have similar electric fields and lapse functions as (2+1)D BTZ black holes

These solutions can be black holes, extremal, or naked singularities depending on parameters

They satisfy the first law of thermodynamics and are stable in the canonical ensemble

Abstract

Motivated by many worthwhile paper about (2 + 1)-dimensional BTZ black holes, we generalize them to to (n + 1)-dimensional solutions, so called BTZ-like solutions. We show that the electric field of BTZ-like solutions is the same as (2 + 1)-dimensional BTZ black holes, and also their lapse functions are approximately the same, too. By these similarities, it is also interesting to investigate the geometric and thermodynamics properties of the BTZ-like solutions. We find that, depending on the metric parameters, the BTZ-like solutions may be interpreted as black hole solutions with inner (Cauchy) and outer (event) horizons, an extreme black hole or naked singularity. Then, we calculate thermodynamics quantities and conserved quantities, and show that they satisfy the first law of thermodynamics. Finally, we perform a stability analysis in the canonical ensemble and show that the BTZ-like solutions are stable in the whole phase space.