Quantum Zeno and anti-Zeno effect in atom-atom entanglement induced by non-Markovian environment

TL;DR

This paper investigates how non-Markovian environments influence the entanglement dynamics of two atoms in a lossy cavity, revealing effects akin to quantum Zeno and anti-Zeno phenomena that affect disentanglement speed.

Contribution

It provides a quantitative analysis of entanglement behavior in non-Markovian settings, linking it to quantum Zeno and anti-Zeno effects, which is a novel insight.

Findings

Disentanglement speed decreases with cavity damping rate near resonance.

Disentanglement speed increases with cavity damping rate far from resonance.

Quantum Zeno and anti-Zeno effects are responsible for these behaviors.

Abstract

The dynamic behavior of the entanglement for two two-level atoms coupled to a common lossy cavity is studied. We find that the speed of disentanglement is a decreasing (increasing) function of the damping rate of the cavity for on/near (far-off) resonant couplings. The quantitative explanations for these phenomena are given, and further, it is shown that they are related to the quantum Zeno and anti-Zeno effect induced by the non-Markovian environment.