论文标题
转向的量子克隆
Quantum cloning of steering
论文作者
论文摘要
在全球状态下的量子转向使观察者可以通过对另一部分进行不同的局部测量来远程将子系统转向不同的集合。我们表明，通常，该属性不能被转向子系统和第三个系统之间的任何关节操作完美克隆。当且仅当初始状态为零时，完美克隆是可行的。我们还研究了使用通用克隆计算机克隆钟形状态的转导量子的过程。在两个副本子系统中观察到Einstein-Podolsky-Rosen（EPR）转向，它是在没有局部隐藏模型的情况下存在的一种量子相关性。这与量子转向（EPR转向）无关的结论相矛盾[C. Y. Chiu等人，NPJ量子。 2，16020（2016）]基于EPR转向的共同信息标准。
Quantum steering in a global state allows an observer to remotely steer a subsystem into different ensembles by performing different local measurements on the other part. We show that, in general, this property cannot be perfectly cloned by any joint operation between a steered subsystem and a third system. Perfect cloning is viable if and only if the initial state is of zero discord. We also investigate the process of cloning the steered qubit of a Bell state using a universal cloning machine. Einstein-Podolsky-Rosen (EPR) steering, which is a type of quantum correlation existing in the states without a local-hidden-state model, is observed in the two copy subsystems. This contradicts the conclusion of no-cloning of quantum steering (EPR steering) [C. Y. Chiu et al., npj Quantum Inf. 2, 16020 (2016)] based on a mutual information criterion for EPR steering.
