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Quantum discord dynamics of three qubits in non-Markovian environments
  • ISSN号：0253-6102
  • 期刊名称：Communications in Theoretical Physics
  • 时间：2014.6
  • 页码：691-698
  • 分类：O413.1[理学—理论物理;理学—物理] O211.62[理学—概率论与数理统计;理学—数学]
  • 作者机构：[1]State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • 相关基金：Supported by the National Natural Science Foundation of China under Grant Nos. 11174081, 11034002, 11134003, and 11104075, and by the National Basic Research Program of China under Grant Nos. 2011CB921602 and 2012CB821302
  • 相关项目：超导传输线腔与极性分子耦合系统中的量子信息过程
作者： Zhang Yan|Liu Jin-Ming|Li Yan-Jie|
关键词： 量子动力学, 马氏环境, 量子比特, 马尔可夫, 中心频率, 初始状态, 相互作用, QD, quantum discord, non-Markovian environment, W-type state, detuning
中文摘要：

我们在零温度，其各个与 Lorentzian 由一个漏的洞被建模在三座独立 non-Markovian 水库为一个混合 three-qubit W 类型状态调查 pairwise 量不一致(QD ) 的动力学光谱密度。环境 non-Markovianity，在 qubit 频率之间的 detuning 和洞中心频率的数量的影响，和 QD 动力学上的起始的状态的纯净详细被分析。在 non-Markovian 政体，系统水库相互作用导致 QD 苏醒，摆动不管 detuning 是否是零，这被发现。而且，如果 non-Markovian 条件和 detuning 条件同时满足， QD 能很长时间被保存。

英文摘要：

We investigate the dynamics of palrwise quantum discord （QD） for a mixed three-qubit W-type state in three independent non-Markovian reservoirs at zero temperature, each of which is modeled by a leaky cavity with Lorentzian spectral density. The influence of the environment＇s amount of non-Markovianity, the detuning between the qubit frequency and the cavity centre frequency, and the purity of the initial state on the QD dynamics are analyzed in detail. It is found that in the non-Maxkovian regime the system-reservoir interactions induce QD revivals and oscillations no matter whether the detuning is zero or not. Moreover, QD can be preserved for a long time if the non-Markovian condition and the detuning condition are satisfied simultaneously.

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期刊信息
  • 《理论物理通讯：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中科院理论物理所 中国物理学会
  • 主编：孙昌浦
  • 地址：北京2735邮政信箱 中国科学院理论物理研究所编辑部
  • 邮编：100190
  • 邮箱：ctp@itp.ac.cn
  • 电话：010-62551495 62541813 62550630
  • 国际标准刊号：ISSN：0253-6102
  • 国内统一刊号：ISSN：11-2592/O3
  • 邮发代号:
  • 获奖情况:
  • 首届国家期刊奖,中国科学院优秀期刊特别奖,国家期刊奖百种重点期刊,中国期刊方阵“双高”期刊
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  • 被引量:342