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Demonstration of Entanglement between Free Electrons and Photons

Jan-Wilke Henke, Hao Jeng, Murat Sivis, Claus Ropers

Published Jan 1, 2026• 0 citations
Publisher

Abstract

We report the observation of entanglement between the path of free electrons and the polarization of a generated photon. Performing coincidence measurements in different bases, we reconstruct the joint electron-photon state and evaluate the Peres-Horodecki entanglement criterion, which is violated by more than 7 standard deviations.
DOI
10.1364/cleo_fs.2026.fm1d.6

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