Single-electron entanglement and nonlocality
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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New Journal of Physics, Volume 18, issue 4, pp. 1-9
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.Description
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Dasenbrook, D, Bowles, J, Brask, J B, Hofer, P P, Flindt, C & Brunner, N 2016, 'Single-electron entanglement and nonlocality', New Journal of Physics, vol. 18, no. 4, 043036, pp. 1-9. https://doi.org/10.1088/1367-2630/18/4/043036