| A Simplified and Obvious Expression of Concurrence in Wootters‘ Measure of Entanglement of a Pair of Qubits |
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| 作者姓名： | 王安民 |
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| 作者单位： | InstituteforTheoreticalPhysics,DepartmentofModernPhysics,UniversityofScienceandTechnologyofChina,Hefei230026 |
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| 摘 要： | We obtain a simplified and obvious expression of“concurrence” in Wootters‘ measure of entanglement of a pair of qubits that have no more than two non-zero eigenvalues in terms of the concurrences of eigenstates and theirsimple combinations. It not only simplifies the calculation of Wootters‘ measure of entanglement, but also revealssome general and important features. Our conclusions are helpful for the further understanding and applicationof quantum entanglement.
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| 关 键 词： | 昆比特 qubit 共点 简化描述 量子纠结 量子态 混合态 量子理论 量子信息 量子输运 特征值 Wootters测量 |
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