Two-qubit entanglement dynamics for two different non-Markovian environments

TL;DR

This paper investigates how entanglement between two noninteracting qubits evolves over time in two different non-Markovian environments, revealing conditions for entanglement revivals and trapping.

Contribution

It provides new insights into entanglement dynamics in non-Markovian settings with specific environmental conditions, highlighting the effects of cavity detuning and photonic band gaps.

Findings

Entanglement revivals can be controlled by cavity-qubit detuning.

Partial entanglement trapping occurs in non-ideal photonic band-gap environments.

Adjusting environmental parameters influences entanglement dynamics.

Abstract

We study the time behavior of entanglement between two noninteracting qubits each immersed in its own environment for two different non-Markovian conditions: a high-$Q$ cavity slightly off-resonant with the qubit transition frequency and a nonperfect photonic band-gap, respectively. We find that revivals and retardation of entanglement loss may occur by adjusting the cavity-qubit detuning, in the first case, while partial entanglement trapping occurs in non-ideal photonic-band gap.