Fully Relativistic Entanglement Harvesting

TL;DR

This paper demonstrates that fully relativistic quantum field theories can harvest entanglement as effectively as non-relativistic particle detectors, validating their use in entanglement studies across different regimes.

Contribution

It shows that relativistic quantum field modes can harvest entanglement similarly to non-relativistic detectors, extending the applicability of entanglement harvesting protocols.

Findings

Relativistic quantum field modes harvest as much entanglement as non-relativistic detectors.

Results validate the use of particle detectors in relativistic entanglement studies.

Relativistic effects do not diminish the entanglement harvesting capability.

Abstract

We study the protocol of entanglement harvesting when the particle detectors that harvest entanglement from the field are replaced by fully relativistic quantum field theories. We show that two localized modes of the quantum field theories are able to harvest the same amount of leading order entanglement as two non-relativistic particle detectors, thus implying that QFT probes can generally harvest more entanglement than particle detectors. These results legitimize the use of particle detectors to study entanglement harvesting regardless of their internally non-relativistic nature.