强测量与弱测量之间的相互作用：弱值估计的三种实验方法的比较
Interplay between strong and weak measurement: Comparison of three experimental approaches to weak value estimation
摘要：
弱值传统上使用被测系统和指针状态之间的弱相互作用来获得。然而，已经指出，弱耦合可以被精心定制的强相互作用所取代。本文对两种基于强相互作用的方法（强相互作用伴随着适当准备的指针态或量子擦除）和传统的基于弱相互作用的方法进行了直接比较。提出的理论推导明确证明了这些方法的解析等价性，随后通过在线性光学平台上实施的实验验证了这些方法。我们发现，强相互作用为基础的测量实验要求不高，在这个平台上。
英文摘要：
Weak values are traditionally obtained using a weak interaction between the measured system and a pointer state. It has, however, been pointed out that weak coupling can be replaced by a carefully tailored strong interaction. This paper provides a direct comparison of two strong interaction-based approaches (strong interaction accompanied by either a suitably prepared pointer state or quantum erasure) and the traditional weak interaction-based method. Presented theoretical derivations explicitly prove analytical equivalence of these approaches which was subsequently certified by an experiment implemented on the platform of linear optics. We find that strong-interaction-based measurements are experimentally less demanding on this platform.
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