Entanglement from rotating black holes in thermal baths

TL;DR

This paper investigates how rotating black holes in thermal environments generate quantum entanglement during Hawking radiation, revealing the ergoregion as a source and thermal baths as a degrading factor, with implications for quantum information preservation.

Contribution

It extends previous models by including rotation and thermal baths, providing new insights into entanglement dynamics in realistic black hole scenarios using Gaussian quantum information techniques.

Findings

Ergoregion actively generates quantum entanglement.

Thermal environments significantly reduce entanglement.

Predictions can be tested with analogue laboratory platforms.

Abstract

We extend previous efforts to quantify the entanglement generated in Hawking's evaporation process by including rotation and thermal environments (e.g. the cosmic microwave background). Both extensions are needed to describe real black holes in our universe. Leveraging techniques from Gaussian quantum information, we find that the black hole's ergoregion is an active source of quantum entanglement and that thermal environments drastically degrade entanglement generation. Our predictions are suitable to be tested in the lab using analogue platforms and also provide tools to assess the fate of quantum information for black holes in more generic settings.