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.

中文翻译：

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强弱测量之间的相互作用：三种弱值估计实验方法的比较

传统上使用被测系统和指针状态之间的弱交互来获得弱值。然而，有人指出，弱耦合可以被精心定制的强交互所取代。本文直接比较了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状态或量子擦除）和传统的基于弱相互作用的方法。提出的理论推导明确证明了这些方法的分析等效性，随后在线性光学平台上实施的实验证明了这些方法的等效性。我们发现基于强交互的测量对这个平台的实验要求较低。