Bloch表示中单量子比特的量子相干性  

Quantum Coherence of Single Quantum Bit in Bloch Representation

作　　者：彭柯铭[1] 王国友[1] 陈健 谭金桃 邓志宏[1] 陈光伟[1] PENG Keming;WANG Guoyou;CHEN Jian;TAN Jintao;DENG Zhihong;CHEN Guangwei(College of Science,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学理学院,湖南株洲412007

出　　处：《湖南工业大学学报》2019年第2期75-79,共5页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(11275064;11747104);湖南省自然科学基金资助项目(2016JJ2045);湖南省教育厅科研基金资助项目(16C0469)

摘　　要：研究了Bloch表示中单量子比特的l_1 norm相干性和量子相对熵相干性,分别得到了相位阻尼通道、退极化通道和振幅阻尼通道下的两种相干性的解析表达式。作为它们的具体应用,解析研究了振幅阻尼通道下的一个单量子比特的量子相干性动力学演化,并数值分析了马尔科夫和非马尔科夫环境对系统的相干性演化的影响。A research has been conducted on the l1 norm coherence and quantum relative entropy coherence of single quantum bit in Bloch representation, thus obtaining two analytical expressions of coherence for phase damping channel, depolarization channel and amplitude damping channel respectively. As a speci?c application, an analytical study has been made on the dynamic evolution of quantum coherence of a single quantum bit in an amplitude-damped channel, followed by a numerical analysis of the in?uences of Markovian as well as non-Markovian environments on the coherence evolution of the system.

关 键 词：Bloch表示 l1 norm相干性 量子相对熵相干性 退相干通道 

分 类 号：O431.2[机械工程—光学工程]