| 基于关联方向测量的量子关联 |
| |
| 引用本文： | 席政军,雷红轩,李永明. 基于关联方向测量的量子关联[J]. 中国科学:物理学 力学 天文学, 2012, 0(5): 515-521 |
| |
| 作者姓名： | 席政军 雷红轩 李永明 |
| |
| 作者单位： | 陕西师范人学计算机科学学院,西安710062 |
| |
| 基金项目： | 国家自然科学基金（批准号：60873119）、博士点基金（编号：200807180005）和陕西师范人学优博基金（编号：S2009YB03）资助项目 |
| |
| 摘 要： | 通过讨论量子失协的上界，给出可达熵量子关联态的一个必要条件．对于双量子比特系统，利用可获得经典关联的最佳测量定义了关联方向上最小的量子失协，分析得到该度量是量子失协很好的逼近结果．最后，讨论量子关联的动力学过程，发现量子关联在衰减的过程中出现了突然的改变，利用关联方向上最小的量子失协给出了该现象的合理解释．
|
| 关 键 词： | 量子关联， 量子失协， 熵增量， 关联方向 |
Quantum correlation on the correlation directions measurements |
| |
| XI ZhengJun,LEI HongXuan ＆ LI YongMing. Quantum correlation on the correlation directions measurements[J]. SCIENCE CHINA Physics, Mechanics & Astronomy, 2012, 0(5): 515-521 |
| |
| Authors: | XI ZhengJun LEI HongXuan ＆ LI YongMing |
| |
| Affiliation: | ( College of Computer Science, Shaanxi Normal University, Xi＇an 710062, China) |
| |
| Abstract: | We discuss the upper bound of quantum discord, and derive a necessary condition for the reachable entropy quantum correlated states. We analyze the optimal measurements to access classical correlation in arbitrary two-qubit system. Then, we define the minimum quantum discord on the correlation direction, and demonstrate that it could be a good approximation of quantum discord. Finally, we study the dynamics of quantum correlation, which exhibits a sudden change under the decayed process, then we give a reasonable interpretation for this phenomenon with respects to the minimum quantum discord on the correlation direction. |
| |
| Keywords: | quantum correlation quantum discord entropy increase correlation direction |
| 本文献已被 维普 等数据库收录！ |
|
