Experimental evidence for quantum Brownian motion in electron-metal decoherence
Abstract
Feynman once remarked that the double-slit experiment has in its heart the only mystery of quantum mechanics. Arguably, the scientific significance of double-slit experiments lies in motional decoherence and the mechanism behind it. Decoherence of motional states underpins our understanding of quantum-to-classical transition. It is also central to the operation of miniaturized quantum electron devices and poses a resolution limit for electron microscopes. In this work, we provide experimental evidence for the critical role of quantum Brownian motion in electron motional decoherence. We demonstrate, for the first time, clear signatures of electron-metal decoherence and its continuous tunability. Our experiment concludes a two-decade long search for experimental realization of the Anglin-Paz-Zurek proposal, establishing electron-microchannel systems as viable open quantum platforms for free-electron quantum optics. The quantitative agreement between experiment and theory further paves the way for testing the Caldeira-Leggett quantum dissipation theory with free electrons.
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BibTeX
@misc{huang2026experimental,
title = {{Experimental evidence for quantum Brownian motion in electron-metal decoherence}},
author = {Wayne Cheng-Wei Huang and Zilin Chen and Herman Batelaan},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.37293},
eprint = {2610.37293},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.37293},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Experimental evidence for quantum Brownian motion in electron-metal decoherence
AU - Wayne Cheng-Wei Huang
AU - Zilin Chen
AU - Herman Batelaan
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.37293
UR - https://arxiv.org/abs/2610.37293
AB - Feynman once remarked that the double-slit experiment has in its heart the only mystery of quantum mechanics. Arguably, the scientific significance of double-slit experiments lies in motional decoherence and the mechanism behind it. Decoherence of motional states underpins our understanding of quantum-to-classical transition. It is also central to the operation of miniaturized quantum electron devices and poses a resolution limit for electron microscopes. In this work, we provide experimental evidence for the critical role of quantum Brownian motion in electron motional decoherence. We demonstrate, for the first time, clear signatures of electron-metal decoherence and its continuous tunability. Our experiment concludes a two-decade long search for experimental realization of the Anglin-Paz-Zurek proposal, establishing electron-microchannel systems as viable open quantum platforms for free-electron quantum optics. The quantitative agreement between experiment and theory further paves the way for testing the Caldeira-Leggett quantum dissipation theory with free electrons.
ER -