Quantum scattering process and information transfer out of a black hole

TL;DR

This paper explores the possibility of information transfer from inside a black hole's horizon by analyzing quantum scattering processes, suggesting that information may escape black holes in principle.

Contribution

It extends quantum scattering analysis to black hole horizons, proposing a mechanism for information transfer from inside to outside the horizon.

Findings

Nonzero scattering amplitude outside the light-cone

Theoretical possibility of information escape from black holes

Implications for black hole information paradox

Abstract

We calculate the probability amplitude for tree-level elastic electron-muon scattering in Minkowski spacetime with carefully prepared initial and final wave packets. The obtained nonzero amplitude implies a nonvanishing probability for detecting a recoil electron outside the light-cone of the initial muon. Transposing this Minkowski-spacetime scattering result to a near-horizon spacetime region of a massive Schwarzschild black hole and referring to a previously proposed Gedankenexperiment, we conclude that, in principle, it is possible to have information transfer from inside the black-hole horizon to outside.