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On-demand entanglement generation using dynamic single-electron sources

Hofer, Patrick P. LU ; Dasenbrook, David and Flindt, Christian (2017) In Physica Status Solidi (B) Basic Research 254(3).
Abstract

We review our recent proposals for the on-demand generation of entangled few-electron states using dynamic single-electron sources. The generation of entanglement can be traced back to the single-electron entanglement produced by quantum point contacts (QPCs) acting as electronic beam splitters. The coherent partitioning of a single electron leads to entanglement between the two outgoing arms of the QPC. We describe our various approaches for generating and certifying entanglement in dynamic electronic conductors and we quantify the influence of detrimental effects such as finite electronic temperatures and other dephasing mechanisms. The prospects for future experiments are discussed and possible avenues for further developments are... (More)

We review our recent proposals for the on-demand generation of entangled few-electron states using dynamic single-electron sources. The generation of entanglement can be traced back to the single-electron entanglement produced by quantum point contacts (QPCs) acting as electronic beam splitters. The coherent partitioning of a single electron leads to entanglement between the two outgoing arms of the QPC. We describe our various approaches for generating and certifying entanglement in dynamic electronic conductors and we quantify the influence of detrimental effects such as finite electronic temperatures and other dephasing mechanisms. The prospects for future experiments are discussed and possible avenues for further developments are identified. (a) The coherent partitioning of a single electron on a QPC leads to entanglement between the outgoing arms. The entanglement can be detected using two copies of the state. (b) A time-bin entangled state is generated by partitioning two electrons on a QPC followed by projection onto the subspace with one electron in each arm. The two-electron entanglement is due to the entanglement of the individual single-electron states. In both panels, circles represent single-electron sources and squares represent detectors.

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author
publishing date
type
Contribution to journal
publication status
published
keywords
entanglement, Floquet scattering theory, Fluctuations, noise, single-electron sources
in
Physica Status Solidi (B) Basic Research
volume
254
issue
3
publisher
John Wiley & Sons
external identifiers
  • scopus:85008256403
ISSN
0370-1972
DOI
10.1002/pssb.201600582
language
English
LU publication?
no
id
403b094b-8211-445b-878a-9ef9d0de9efe
date added to LUP
2019-03-11 16:54:44
date last changed
2019-04-10 04:20:45
@article{403b094b-8211-445b-878a-9ef9d0de9efe,
  abstract     = {<p>We review our recent proposals for the on-demand generation of entangled few-electron states using dynamic single-electron sources. The generation of entanglement can be traced back to the single-electron entanglement produced by quantum point contacts (QPCs) acting as electronic beam splitters. The coherent partitioning of a single electron leads to entanglement between the two outgoing arms of the QPC. We describe our various approaches for generating and certifying entanglement in dynamic electronic conductors and we quantify the influence of detrimental effects such as finite electronic temperatures and other dephasing mechanisms. The prospects for future experiments are discussed and possible avenues for further developments are identified. (a) The coherent partitioning of a single electron on a QPC leads to entanglement between the outgoing arms. The entanglement can be detected using two copies of the state. (b) A time-bin entangled state is generated by partitioning two electrons on a QPC followed by projection onto the subspace with one electron in each arm. The two-electron entanglement is due to the entanglement of the individual single-electron states. In both panels, circles represent single-electron sources and squares represent detectors.</p>},
  articleno    = {1600582},
  author       = {Hofer, Patrick P. and Dasenbrook, David and Flindt, Christian},
  issn         = {0370-1972},
  keyword      = {entanglement,Floquet scattering theory,Fluctuations,noise,single-electron sources},
  language     = {eng},
  month        = {03},
  number       = {3},
  publisher    = {John Wiley & Sons},
  series       = {Physica Status Solidi (B) Basic Research},
  title        = {On-demand entanglement generation using dynamic single-electron sources},
  url          = {http://dx.doi.org/10.1002/pssb.201600582},
  volume       = {254},
  year         = {2017},
}