【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.更多还原

【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.更多还原