Back-reaction in canonical analogue black holes

TL;DR

This paper investigates how Hawking radiation affects a Bose-Einstein condensate analogue of a black hole, revealing local and global back-reactions that shed light on black hole evaporation and unitarity.

Contribution

It demonstrates the presence of local and global back-reactions in an acoustic black hole model, providing new insights into black hole evaporation processes.

Findings

Hawking radiation causes local perturbations near the horizon.

Emission induces global density distribution changes.

Results support the compatibility of black hole evaporation with unitarity.

Abstract

We study the back-reaction associated with Hawking evaporation of an acoustic canonical analogue black hole in a Bose-Einstein condensate. We show that the emission of Hawking radiation induces a local back-reaction on the condensate, perturbing it in the near-horizon region, and a global back-reaction in the density distribution of the atoms. We discuss how these results produce useful insights into the process of black hole evaporation and its compatibility with a unitary evolution.