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Single-electron entanglement and nonlocality

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Published in New Journal of Physics. 2016, vol. 18
Abstract Motivated by recent progress in electron quantum optics, we revisit the question of single-electron entanglement, specifically whether the state of a single electron in a superposition of two separate spatial modes should be considered entangled. We first discuss a gedanken experiment with single-electron sources and detectors, and demonstrate deterministic (i. e. without post-selection) Bell inequality violation. This implies that the single-electron state is indeed entangled and, furthermore, nonlocal. We then present an experimental scheme where single-electron entanglement can be observed via measurements of the average currents and zero-frequency current cross-correlators in an electronic Hanbury Brown-Twiss interferometer driven by Lorentzian voltage pulses. We show that single-electron entanglement is detectable under realistic operating conditions. Our work settles the question of single-electron entanglement and opens promising perspectives for future experiments.
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arXiv: 1511.04450
Note 15 pages, 2 figures
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DASENBROOK, David et al. Single-electron entanglement and nonlocality. In: New Journal of Physics, 2016, vol. 18. https://archive-ouverte.unige.ch/unige:84466

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Deposited on : 2016-06-13

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