Turner AE, Johnson CW, Kruit P, McMorran BJ. Interaction-Free Measurement with Electrons.
PHYSICAL REVIEW LETTERS 2021;
127:110401. [PMID:
34558944 DOI:
10.1103/physrevlett.127.110401]
[Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 05/18/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
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.
Collapse