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  • Title: Interaction-Free Measurement with Electrons.
    Author: Turner AE, Johnson CW, Kruit P, McMorran BJ.
    Journal: Phys Rev Lett; 2021 Sep 10; 127(11):110401. PubMed ID: 34558944.
    Abstract:
    Here, we experimentally demonstrate interaction-free measurements with electrons using a novel electron Mach-Zehnder interferometer. The flexible two-grating electron interferometer is constructed in a conventional transmission electron microscope and achieves high contrast in discrete output detectors, tunable alignment with independently movable beam splitters, and scanning capabilities for imaging. With this path-separated electron interferometer, which closely matches theoretical expectations, we demonstrate electron interaction-free measurements with an efficiency of 14±1%. Implementing this quantum protocol in electron imaging opens a path toward interaction-free electron microscopy.
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