Hawking temperature in the eternal BTZ black hole: an example of Holography in AdS spacetime

TL;DR

This paper explores the holographic relationship between AdS spacetime and the BTZ black hole, demonstrating how thermal states and effects like Unruh and Hawking are interconnected in this context.

Contribution

It provides a detailed analysis of the thermal nature of the BTZ black hole within the holographic framework using Algebraic Holography and quantum field models.

Findings

Ground state in AdS becomes thermal in BTZ black hole

Unruh effect in AdS corresponds to Hawking effect in BTZ

Holographic correspondence links bulk and boundary observables

Abstract

We review the relation between AdS spacetime in 1+2 dimensions and the BTZ black hole. Later we show that a ground state in AdS spacetime becomes a thermal state in the BTZ black hole. We show that this is true in the bulk and in the boundary of AdS spacetime. The existence of this thermal state is tantamount to say that the Unruh effect exists in AdS spacetime and becomes the Hawking effect for an eternal BTZ black hole. In order to make this we use the correspondence introduced in Algebraic Holography between algebras of quasi-local observables associated to wedges and doble cones regions in the bulk of AdS spacetime and its conformal boundary respectively. Also we give the real scalar quantum field as a concrete heuristic realization of this formalism.