Quantum correlations between two parties are essential for the argument of Einstein, Podolsky, and Rosen in favor of the incompleteness of quantum mechanics. Schrödinger noted that an essential point is the fact that one party can influence the wave function of the other party by performing suitable measurements. He called this phenomenon quantum steering and studied its properties, but only in recent years has this kind of quantum correlation attracted significant interest in quantum information theory. In this paper, the theory of quantum steering is reviewed. First, the basic concepts of steering and local hidden state models are presented and their relation to entanglement and Bell nonlocality is explained. Then various criteria for characterizing steerability and structural results on the phenomenon are described. A detailed discussion is given on the connections between steering and incompatibility of quantum measurements. Finally, applications of steering in quantum information processing and further related topics are reviewed.

中文翻译：

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量子转向

两方之间的量子相关性对于爱因斯坦，波多尔斯基和罗森主张量子力学的不完全性至关重要。Schrödinger指出，一个重要的事实是，一方可以通过执行适当的测量来影响另一方的波动函数。他称这种现象为量子转向，并研究了它的性质，但是直到最近几年，这种量子相关才引起了量子信息理论的极大兴趣。本文综述了量子转向理论。首先，介绍了转向和局部隐藏状态模型的基本概念，并说明了它们与纠缠和Bell非局部性的关系。然后描述了表征该现象的可操纵性和结构结果的各种标准。给出了转向与量子测量不兼容之间的联系的详细讨论。最后，回顾了指导在量子信息处理中的应用以及其他相关主题。