Broadening the scope of weak quantum measurements II: Past and future measurement effects within a double Mach-Zehnder-interferometer setting
arXiv:1207.0667 · doi:10.1103/PhysRevA.89.052105
Abstract
Following earlier applications of weak measurement to new cases (Part I), we proceed to explore its temporal peculiarities. We analyze an idealized experiment in which weak which-path measurements do not prevent consecutive weak interference effects, and then again the which-path information is recovered by strong measurements. We also show how the same effect can be obtained even by all these measurements being carried out on a single particle. The simplified setting enables critically assessing competing interpretations of the results. The most natural one is that of the Two-State-Vector Formalism, according to which the quantum "two-state" between an earlier and a later measurement is equally determined by both of them.
11 pages, 3 figures. Submitted to Physical Review A
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