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Quantifying the presence of a neutron in the paths of an interferometer

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In our latest work we experimentally investigate the possibility that an individual neutron moving through a two-path interferometer may actually be physically distributed between the two paths. For this purpose, it is important to distinguish between the probability of finding the complete particle in one of the paths and the distribution of an individual particle over both paths. The results show that individual particles experience a specific fraction of the magnetic field applied in one of the paths, indicating that a fraction or even a multiple of the particle was present in the path before the interference of the two paths was registered, verified by the recently introduced method of feedback compensation. H. Lemmel et al. Phs. Rev. Research 4, 023075 (2022), öffnet eine externe URL in einem neuen Fenster (28. April 2022)