Quantum metric fluctuations and Hawking radiation

TL;DR

This paper investigates how quantum metric fluctuations influence Hawking radiation, revealing that near-horizon interactions induce dissipation and prevent trans-Planckian issues, aligning black hole radiation with condensed matter analogies.

Contribution

It introduces a model where quantum metric fluctuations cause dissipation near the horizon, offering a new perspective on Hawking radiation mechanisms.

Findings

Quantum metric fluctuations induce dissipation near the horizon.

Dissipation prevents trans-Planckian frequencies in Hawking radiation.

Hawking radiation resembles sound propagation in condensed matter models.

Abstract

In this Letter we study the gravitational interactions between outgoing configurations giving rise to Hawking radiation and in-falling configurations. When the latter are in their ground state, the near horizon interactions lead to collective effects which express themselves as metric fluctuations and which induce dissipation, as in Brownian motion. This dissipation prevents the appearance of trans-Planckian frequencies and leads to a description of Hawking radiation which is very similar to that obtained from sound propagation in condensed matter models.