He Kan, Huang Miaomiao, Hou Jinchuan
College of Mathematics, Institute of Mathematics, Taiyuan University of Technology, Taiyuan, 030024, P. R. China.
Sci Rep. 2019 Feb 4;9(1):1314. doi: 10.1038/s41598-018-36307-1.
Quantum entanglement is one of important resources for quantum communication. Entanglement criteria help us detect entangled states. One of important criteria is the local uncertainty relation (LUR) entanglement criteria, which is studied extensively. However, all existent LUR criteria are dependent on the chosen observables. In the paper, applying the uncertainty principle, we improve the LUR criteria to obtain entanglement criteria for multipartite Gaussian states, which are independent on observalbes.
量子纠缠是量子通信的重要资源之一。纠缠判据有助于我们检测纠缠态。重要判据之一是局部不确定性关系（LUR）纠缠判据，对此已有广泛研究。然而，所有现有的LUR判据都依赖于所选择的可观测量。在本文中，应用不确定性原理，我们改进了LUR判据，以获得与可观测量无关的多体高斯态的纠缠判据。
