Entanglement generation for uniformly accelerated atoms assisted by environment-induced interatomic interaction and the loss of the anti-Unruh effect

TL;DR

This paper investigates how environment-induced interatomic interactions influence entanglement dynamics of uniformly accelerated atoms, revealing that such interactions enhance entanglement generation and alter the anti-Unruh effect.

Contribution

It demonstrates that environment-induced interatomic interactions significantly affect entanglement behavior, enlarging the parameter space for entanglement and modifying acceleration dependence.

Findings

Environment-induced interaction enlarges entanglement parameter space.

Entanglement rate and maximum increase with interaction.

Anti-Unruh effect on entanglement is suppressed by environment-induced interaction.

Abstract

We study the influence of the environment-induced interatomic interaction, which is usually neglected, on the entanglement dynamics of two uniformly accelerated atoms coupled with fluctuating massless scalar fields in the Minkowski vacuum. When the two-atom system is initially prepared in a separable state such that the two atoms are in the ground and excited states respectively, the environment-induced interatomic interaction assists entanglement generation, in the sense that the parameter space of acceleration and interatomic separation that allows entanglement generation is enlarged, the rate of entanglement generation at the initial time is enhanced, and the maximum of concurrence generated during evolution is increased compared with when the environment-induced interaction is neglected. Remarkably, the rate of entanglement generation at the initial time and the maximal concurrence generated during evolution decrease monotonically with the acceleration, in contrast to that they exhibit a nonmonotonic behavior as the acceleration varies when the environment-induced interatomic interaction is neglected. In other words, the anti-Unruh phenomenon in terms of the entanglement generation is deprived of by the consideration of the environment-induced interatomic interaction.