Across-horizon scattering and information transfer

TL;DR

This paper investigates the possibility of Coulomb scattering between charged particles across a black hole horizon, demonstrating its consistency with energy conservation and proposing a thought experiment for information transfer from inside to outside the horizon.

Contribution

It introduces the concept of across-horizon scattering and shows its physical plausibility, suggesting a new way to transfer information from inside a black hole.

Findings

Across-horizon scattering is consistent with energy-momentum conservation.

Such scattering can occur physically and is relevant to astrophysical black holes.

A Gedankenexperiment is proposed for information transfer across the horizon.

Abstract

We address the question whether or not two electrically charged elementary particles can Coulomb scatter if one of these particles is inside the Schwarzschild black-hole horizon and the other outside. It can be shown that the quantum process is consistent with the local energy-momentum conservation law. This result implies that across-horizon scattering is a physical effect, relevant to astrophysical black holes. We propose a Gedankenexperiment which uses the quantum scattering process to transfer information from inside the black-hole horizon to outside.