| 二非正交纯态相混合的concurrence |
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| 引用本文： | 狄尧民,胡宝林,刘冬冬,颜士明.二非正交纯态相混合的concurrence[J].物理学报,2006,55(8):3869-3874. |
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| 作者姓名： | 狄尧民 胡宝林 刘冬冬 颜士明 |
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| 作者单位： | 徐州师范大学物理系，徐州 221116 |
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| 基金项目： | 国家自然科学基金，徐州师范大学校科研和教改项目 |
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| 摘 要： | 导出了两量子比特中二非正交纯态相混合的concurrence 的明显表达式, 并作了验证. 推算表明，正交情形下的concurrence公式可以直接推广到非正交的情形. 讨论了两纯态相混合的最大纠缠混合态和一些重要特殊情形.
关键词：
量子纠缠
纯态
混合态
concurrence
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| 关 键 词： | 量子纠缠 纯态 混合态 concurrence |
| 文章编号： | 1000-3290/2006/55(08)/3869-06 |
| 收稿时间： | 11 28 2005 12:00AM |
| 修稿时间： | 2005-11-282006-04-10 |
Concurrence of the mixed state of two non-orthogonal pure states |
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| Di Yao-Min,Hu Bao-Lin,Liu Dong-Dong,Yan Shi-Ming.Concurrence of the mixed state of two non-orthogonal pure states[J].Acta Physica Sinica,2006,55(8):3869-3874. |
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| Authors: | Di Yao-Min Hu Bao-Lin Liu Dong-Dong Yan Shi-Ming |
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| Abstract: | In this article an obvious expression of concurrence of the mixed state of two non-orthogonal pure states in two qubits is derived. The result reveals that the expression of concurrence of the mixed state of two orthogonal states can be directly generalized to the case of the mixed state of two non-orthogonal states. Then the maximally entangled states mixed by two pure states and the concurrences in some important special cases are discussed. |
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| Keywords: | concurrence |
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