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Eigenvalues, Peres' Separability Condition, and Entanglement
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作者 wangan-min 《Communications in Theoretical Physics》 SCIE CAS CSCD 2004年第2X期206-210,共5页
The general expression with the physical significance and positive-definite condition of the eigenvalues of 4 × 4 Hermitian and trace-one matrix are obtained. The obvious expression of Peres' separability con... The general expression with the physical significance and positive-definite condition of the eigenvalues of 4 × 4 Hermitian and trace-one matrix are obtained. The obvious expression of Peres' separability condition for an arbitrary state of two qubits is then given and its operational feature is enhanced. Furthermore, we discuss some applications to the calculation of the entanglement, the upper bound of the entanglement, and a model of the transfer of entanglement in a qubit chain with noise. 展开更多
关键词 本征值 密度矩阵 纠缠 量子论 厄密共轭矩阵 可分离性
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