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Single-electron entanglement and nonlocality

  • David Dasenbrook
  • Joseph Bowles
  • Jonatan Bohr Brask
  • Patrick P. Hofer
  • Christian Flindt
  • Nicolas Brunner
Publishing year: 2016-04-01
Language: English
Publication/Series: New Journal of Physics
Volume: 18
Issue: 4
Document type: Journal article
Publisher: IOP Publishing

Abstract english

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.


  • electronic interferometer
  • entanglement
  • nonlocality
  • quantum transport
  • single-electron source


  • ISSN: 1367-2630
Portrait of Patrick Potts
E-mail: patrick [dot] potts [at] teorfys [dot] lu [dot] se

Postdoctoral fellow

Mathematical Physics


Postdoctoral fellow