Hawking Radiation meets the Double Copy

TL;DR

This paper explores the connection between Hawking radiation and the double copy in an electromagnetic analogue, using scattering and semiclassical methods to analyze black hole-like phenomena.

Contribution

It introduces a novel electromagnetic system related to black hole Hawking radiation via the double copy, with diagrammatic and semiclassical analyses.

Findings

Feynman diagrams exponentiate in the geometric-optics limit

Bogoliubov coefficients match semiclassical ray-tracing results

Thermodynamic interpretation aligns with double copy framework

Abstract

We describe an electromagnetic system which is related to black hole production with Hawking radiation through the double copy. We consider the scattering of a massless scalar particle through a collapsing electromagnetic background -- the single copy of Vaidya -- and identify the Feynman diagrams that exponentiate in the geometric-optics limit. The Bogoliubov coefficients obtained from the diagrammatic approach are reproduced by a semiclassical ray-tracing computation of null rays in this same background. We discuss the thermodynamic interpretation of the resulting number distribution in light of the double copy.