Birth and death of entanglement between two accelerating Unruh-DeWitt detectors coupled with a scalar field

TL;DR

This paper investigates how acceleration affects entanglement between two Unruh-DeWitt detectors coupled to a scalar field, revealing creation, divergence, and different behaviors depending on coupling type.

Contribution

It demonstrates that acceleration can generate entanglement, with distinct dynamics for linear and quadratic couplings, including divergence only when detectors coincide.

Findings

Entanglement can be created by acceleration.

Divergence occurs only when detectors coincide.

Entanglement decreases monotonically with acceleration for linear coupling, non-monotonically for quadratic coupling.

Abstract

We consider two accelerating Unruh-DeWitt detectors coupled linearly or quadratically with a scalar field. We show that entanglement can be created by acceleration, and is divergent only when the two detectors coincide. For linear coupling, entanglment decreases monotonically with the increase of acceleration. For quadratic coupling, entanglement behaves non-monotonically.