论文标题
计量互补性揭示了爱因斯坦 - 波多尔斯基 - 罗森悖论
Metrological complementarity reveals the Einstein-Podolsky-Rosen paradox
论文作者
论文摘要
爱因斯坦 - 波多尔斯基 - 罗森（EPR）悖论在我们对量子力学的理解中起着基本作用，并且与预测非交通测量结果的可能性相关，以精确的精度似乎违反了不确定性原则。这种明显的与互补性的矛盾是由于非古典相关性比纠缠（称为转向）更强的。量子信息认为转向是许多任务的重要资源，但与纠缠相反，到目前为止，其在计量学方面的作用尚不清楚。在这里，我们在量子计量的框架中制定了EPR悖论，表明它可以对局部相移的精确估计及其生成可观察到的估计。我们采用更严格的量子互补性表述，基于量子渔民信息得出一个标准，该标准比众所周知的基于不确定性的标准检测到更大的状态类别的转向。我们的结果确定了用于量子增强精度测量值的有用转向，并允许人们在最新的实验中发现非高斯州的转向。
The Einstein-Podolsky-Rosen (EPR) paradox plays a fundamental role in our understanding of quantum mechanics, and is associated with the possibility of predicting the results of non-commuting measurements with a precision that seems to violate the uncertainty principle. This apparent contradiction to complementarity is made possible by nonclassical correlations stronger than entanglement, called steering. Quantum information recognises steering as an essential resource for a number of tasks but, contrary to entanglement, its role for metrology has so far remained unclear. Here, we formulate the EPR paradox in the framework of quantum metrology, showing that it enables the precise estimation of a local phase shift and of its generating observable. Employing a stricter formulation of quantum complementarity, we derive a criterion based on the quantum Fisher information that detects steering in a larger class of states than well-known uncertainty-based criteria. Our result identifies useful steering for quantum-enhanced precision measurements and allows one to uncover steering of non-Gaussian states in state-of-the-art experiments.
