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arXiv · 1511.04450

Single-electron entanglement and nonlocality

David Dasenbrook·Joseph Bowles·Jonatan Bohr Brask·Patrick P. Hofer·Christian Flindt·Nicolas Brunner
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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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David Dasenbrook, Joseph Bowles, Jonatan Bohr Brask, Patrick P. Hofer, Christian Flindt, Nicolas Brunner. 2016-04-27. Single-electron entanglement and nonlocality. https://doi.org/10.1088/1367-2630%2F18%2F4%2F043036

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