理论物理通讯:英文版Separability of Pure and Mixed States of the Quantum Network of Four NodesQian Qian, Shang-Wu, Gu, ZhiyuPublished Jan 1, 2003• 0 citationsOpenAlexAbstractThis article discusses the separability of the pure and mixed states of the quantum network of four nodesby means of the criterion of entanglement in terms of the covariance correlation tensor in quantum network theory.