The fate of non-trivial entanglement under gravitational collapse

TL;DR

This paper investigates how entanglement in a quantum field evolves during gravitational collapse, extending existing tools to dynamic spacetimes and exploring implications for quantum information in curved spacetime.

Contribution

It generalizes entanglement analysis tools from stationary to dynamical spacetimes, enabling study of quantum fields during gravitational collapse.

Findings

Entanglement degrades during collapse

New formalism applicable to dynamical spacetimes

Framework for future quantum gravity research

Abstract

We analyse the evolution of the entanglement of a non-trivial initial quantum field state (which, for simplicity, has been taken to be a bipartite state made out of vacuum and the first excited state) when it undergoes a gravitational collapse. We carry out this analysis by generalising the tools developed to study entanglement behaviour in stationary scenarios and making them suitable to deal with dynamical spacetimes. We also discuss what kind of problems can be tackled using the formalism spelled out here as well as single out future avenues of research.