Interaction-Free Measurement with Electrons

Journal article (2021)

Authors

Amy E. Turner University of Oregon
Cameron W. Johnson University of Oregon
Pieter Kruit ImPhys/Microscopy Instrumentation & Techniques - AS
Benjamin J. McMorran University of Oregon
Research Group
ImPhys/Microscopy Instrumentation & Techniques (AS) (TU Delft)
Copyright: © 2021 Amy E. Turner, Cameron W. Johnson, P. Kruit, Benjamin J. McMorran
DOI: https://doi.org/10.1103/PhysRevLett.127.110401
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Published Date

2021

Language

English

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Microscopy Instrumentation & Techniques

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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