Role of Covariance Correlation Tensor in Establishment of Criterion of Quantum Entanglement

This article discusses the role of covariance correlation tensor in the establishment of the criterion of quantum entanglement. It gives a simple example to show the powerfulness in the treatment of quantum dense coding , and illustrates the fact that this method also provides theoretical basis for establishing corresponding knotted pictures.中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)3445-4504