Influence of field mass and acceleration on entanglement generation

TL;DR

This study investigates how field mass and acceleration influence entanglement between detectors, revealing that in (3+1) dimensions, acceleration-induced thermal effects decrease entanglement, challenging the strong anti-Unruh effect.

Contribution

It demonstrates the absence of a strong anti-Unruh effect in massive scalar fields in (3+1) dimensions and links entanglement fluctuations to detector transition rates.

Findings

Maximum entanglement increases with smaller field mass.

No evidence of a strong anti-Unruh effect in (3+1) dimensions.

Acceleration-induced thermal effects reduce entanglement.

Abstract

We explore the entanglement dynamics of two detectors undergoing uniform acceleration and circular motion within a massive scalar field, while also investigating the influence of the anti-Unruh effect on entanglement harvesting. Contrary to the conventional understanding of the weak anti-Unruh effect, where entanglement typically increases, we observe that the maximum entanglement between detectors does not exhibit a strict monotonic dependence on detector acceleration. Particularly at low accelerations, fluctuations in the entanglement maxima show a strong correlation with fluctuations in detector transition rates.We also find that the maximum entanglement of detectors tends to increase with smaller field mass. Novelly, our findings indicate the absence of a strong anti-Unruh effect in (3+1)-dimensional massive scalar fields. Instead, thermal effects arising from acceleration contribute to a decrease in the detector entanglement maximum.