Sudden Transition in Quantum Discord Dynamics:Role of Three-Site Interaction
作者机构：Department of PhysicsShanghai UniversityShanghai 200444 Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210
出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)
年 卷 期：2013年第30卷第5期
页 面：10-13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]
基 金：the National Natural Science Foundation of China under Grant No 11075101
主 题：interaction quantum interaction
摘 要：We investigate the dynamics of quantum discord for a two-qubit system coupled to a spin chain with three-site interaction in the weak-coupling *** the case of the initial two-qubit pure state,the decay of quantum discord can be delayed in a special interval of the three-site coupling *** the absence of the transverse field,with the increase of three-site interaction,quantum discord tends to be *** the case of the initial mixed state,the increase of quantum discord is delayed in the special interval of three-site *** addition,a sudden transition between classical and quantum decoherence is also observed,with the transition time determined by the three-site interaction and degree of anisotropy.
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