Effects of Horizons on Entanglement Harvesting

TL;DR

This paper investigates how horizons influence the entanglement that can be extracted between two particle detectors in a quantum field, revealing the impact of global spacetime dynamics and information loss on local quantum correlations.

Contribution

It demonstrates the sensitivity of entanglement harvesting to global spacetime features and shows that it is unaffected by the sign of emitted radiation flux.

Findings

Entanglement harvesting depends on the global dynamics of detector trajectories.

It is insensitive to the sign of the emitted radiation flux.

Horizon presence affects the entanglement extraction process.

Abstract

We study the effects of horizons on the entanglement harvested between two Unruh-DeWitt detectors via the use of moving mirrors with and without strict horizons. The entanglement reveals the sensitivity of the entanglement harvested to the global dynamics of the trajectories disclosing aspects of the effect that global information loss (where incoming massless scalar field modes from past null infinity cannot reach right future null infinity) has on local particle detectors. We also show that entanglement harvesting is insensitive to the sign of emitted radiation flux.