Non-Markovian dynamics for a two-atom-coupled system interacting with local reservoir at finite temperature

TL;DR

This paper explores how non-Markovian effects influence the dynamics of two two-level atoms interacting with local reservoirs at finite temperature, revealing control mechanisms and the impact on entanglement.

Contribution

It introduces a method to analyze non-Markovian dynamics in a two-atom system and examines how system parameters affect non-Markovianity and entanglement.

Findings

Subsystem dynamics can be controlled by coupling, temperature, and relaxation rate.

Non-Markovianity negatively affects entanglement.

Emergence of non-Markovianity is linked to structured bath interactions.

Abstract

By using the effective non-Markovian measure [H.P. Breuer, E.M. Laine, J. Piilo, Phys. Rev. Lett. 103, 210401 (2009)], we investigate non-Markovian dynamics of a pair of two-level atoms (TLAs) system, each of which interacting with a local reservoir. We show that subsystem dynamics can be controlled by manipulating the coupling between TLAs, temperature and relaxation rate of the atoms. Moreover, the correlation between non-Markovianity of subsystem and entanglement between the subsystem and the structured bath is investigated, the results show that the emergence of non-Markovianity has a negative effect on the entanglement.