Radiation from Atoms Falling into a Black Hole

TL;DR

This paper demonstrates that atoms falling into a black hole emit a form of acceleration radiation similar to Hawking radiation, and introduces a new entropy measure called HBAR entropy based on this phenomenon.

Contribution

It introduces the concept of Horizon Brightened Acceleration Radiation (HBAR) entropy, a novel entropy measure associated with acceleration radiation from atoms falling into black holes.

Findings

Atoms emit acceleration radiation resembling Hawking radiation.

HBAR entropy is derived using a laser-like analysis.

The radiation's entropy differs from traditional black hole entropy.

Abstract

We show that atoms falling from outside through a cavity into a black hole (BH) emit acceleration radiation which to a distant observer looks much like Hawking BH radiation. In particular, we find the entropy of the acceleration radiation via a simple laser-like analysis. We call this entropy Horizon Brightened Acceleration Radiation (HBAR) entropy to distinguish it from the BH entropy of Bekenstein and Hawking.