Dynamics of entanglement protection of two qubits using a driven laser field and detunings:Independent and common,Markovian and/or non-Markovian regimes

作     者：S Golkar M K Tavassoly 

作者机构：Atomic and Molecular GroupFaculty of PhysicsYazd University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2018年第27卷第4期

页      面：170-177页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

主　　题：entanglement Markovian and non-Markovian reservoir Rabi frequency concurrence 

摘      要：Preventing quantum entanglement from decoherence effect is of theoretical and practical importance in the quantum information processing *** this regard,we consider the entanglement dynamics of two identical qubits where the qubits which are coupled to two independent（Markovian and/or non-Markovian） as well as a common reservoir at zero temperature are further interacted with a classical driving laser ***,we study the preservation of generated two-qubit entanglement in various situations using the concurrence *** is shown that by applying the classical driving field and so the possibility of controlling the Rabi frequency,the amount of entanglement of the two-qubit system is improved in the off-resonance condition between the qubit and the central cavity frequencies（central detuning） in both non-Markovian and Markovian *** the central detuning has a constructive role,the detuning between the qubit and the classical field（laser detuning） affects negatively on the entanglement *** obtained results show that long-living entanglement in the non-Markovian reservoir is more accessible than in the Markovian *** demonstrate that,in a common reservoir non-zero stationary entanglement is achievable whenever the two-qubit system is coupled to the reservoir with appropriate values of relative coupling strengths.