Spectroscopy of a weakly isolated horizon

TL;DR

This paper investigates the spectral properties of weakly isolated horizons, revealing a universal, equally spaced entropy spectrum linked to Hawking temperature, applicable across various spacetimes.

Contribution

It demonstrates that entropy and area quantization is a universal feature of horizons, extending previous results to weakly isolated horizons in diverse spacetimes.

Findings

Entropy spectrum is equally spaced with quantum matching Bekenstein's prediction.

Quantization of entropy and area is a generic property of horizons.

Entropy quantum is closely related to Hawking temperature.

Abstract

The spectroscopy of a weakly isolated horizon (WIH) has been investigated. We obtain an equally spaced entropy spectrum with its quantum equal to the one given by Bekenstein [5]. We demonstrate that the quantization of entropy and area is a generic property of horizon, and the results exit in a wide class of spacetimes admitting weakly isolated horizons. Our results also indicate that the entropy quantum of the black hole horizon is closely related to Hawking temperature.