论文标题
两分量子系统的可计算转向标准
Computable steering criterion for bipartite quantum systems
论文作者
论文摘要
量子转向描述了一位观察者通过局部测量值对另一个观察者的状态非局部影响的能力,该测量代表了一种新形式的量子非局部相关性,并且在量子信息和量子通信中具有潜在的应用。在本文中,我们提出了一个可计算的转向标准,该标准适用于任意维度的两分量子系统。该标准可用于直接从给定的密度矩阵直接验证广泛的可通态,而无需构建测量设置。与现有的转向标准相比,它在实验中很容易计算和测试,这也可以用来验证纠缠,因为所有可进入的量子状态都被纠缠。
Quantum steering describes the ability of one observer to nonlocally affect the other observer's state through local measurements, which represents a new form of quantum nonlocal correlation and has potential applications in quantum information and quantum communication. In this paper, we propose a computable steering criterion that is applicable to bipartite quantum systems of arbitrary dimensions. The criterion can be used to verify a wide range of steerable states directly from a given density matrix without constructing measurement settings. Compared with the existing steering criteria, it is readily computable and testable in experiment, which can also be used to verify entanglement as all steerable quantum states are entangled.