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Single-electron entanglement and nonlocality

Dasenbrook, David ; Bowles, Joseph ; Brask, Jonatan Bohr ; Hofer, Patrick P. LU orcid ; Flindt, Christian and Brunner, Nicolas (2016) In New Journal of Physics 18(4).
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... (More)

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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Please use this url to cite or link to this publication:
author
; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
electronic interferometer, entanglement, nonlocality, quantum transport, single-electron source
in
New Journal of Physics
volume
18
issue
4
article number
043036
publisher
IOP Publishing
external identifiers
  • scopus:84965010061
ISSN
1367-2630
DOI
10.1088/1367-2630/18/4/043036
language
English
LU publication?
no
id
c7fd277f-6976-4d0e-a0b5-d77a39c06c1d
date added to LUP
2019-05-14 09:49:56
date last changed
2022-04-25 23:33:44
@article{c7fd277f-6976-4d0e-a0b5-d77a39c06c1d,
  abstract     = {{<p>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.</p>}},
  author       = {{Dasenbrook, David and Bowles, Joseph and Brask, Jonatan Bohr and Hofer, Patrick P. and Flindt, Christian and Brunner, Nicolas}},
  issn         = {{1367-2630}},
  keywords     = {{electronic interferometer; entanglement; nonlocality; quantum transport; single-electron source}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{4}},
  publisher    = {{IOP Publishing}},
  series       = {{New Journal of Physics}},
  title        = {{Single-electron entanglement and nonlocality}},
  url          = {{http://dx.doi.org/10.1088/1367-2630/18/4/043036}},
  doi          = {{10.1088/1367-2630/18/4/043036}},
  volume       = {{18}},
  year         = {{2016}},
}