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Ubbelohde N, Hohls F, Kashcheyevs V, et al. Partitioning of on-demand electron pairs. Nat Nanotechnol. 2014;10(1):46-9doi: 10.1038/nnano.2014.275.
Ubbelohde, N., Hohls, F., Kashcheyevs, V., Wagner, T., Fricke, L., Kästner, B., Pierz, K., Schumacher, H. W., & Haug, R. J. (2015). Partitioning of on-demand electron pairs. Nature nanotechnology, 10(1), 46-9. https://doi.org/10.1038/nnano.2014.275
Ubbelohde, Niels, et al. "Partitioning of on-demand electron pairs." Nature nanotechnology vol. 10,1 (2015): 46-9. doi: https://doi.org/10.1038/nnano.2014.275
Ubbelohde N, Hohls F, Kashcheyevs V, Wagner T, Fricke L, Kästner B, Pierz K, Schumacher HW, Haug RJ. Partitioning of on-demand electron pairs. Nat Nanotechnol. 2015 Jan;10(1):46-9. doi: 10.1038/nnano.2014.275. Epub 2014 Dec 01. PMID: 25437747.
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Nat Nanotechnol. 2015 Jan;10(1):46-9. doi: 10.1038/nnano.2014.275. Epub 2014 Dec 01.

Partitioning of on-demand electron pairs.

Nature nanotechnology

Niels Ubbelohde, Frank Hohls, Vyacheslavs Kashcheyevs, Timo Wagner, Lukas Fricke, Bernd Kästner, Klaus Pierz, Hans W Schumacher, Rolf J Haug

Affiliations

  1. Institut für Festkörperphysik, Leibniz Universität Hannover, 30167 Hannover, Germany.
  2. Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany.
  3. Faculty of Physics and Mathematics, University of Latvia, LV-1002, Riga, Latvia.

PMID: 25437747 DOI: 10.1038/nnano.2014.275

Abstract

The on-demand generation and separation of entangled photon pairs are key components of quantum information processing in quantum optics. In an electronic analogue, the decomposition of electron pairs represents an essential building block for using the quantum state of ballistic electrons in electron quantum optics. The scattering of electrons has been used to probe the particle statistics of stochastic sources in Hanbury Brown and Twiss experiments and the recent advent of on-demand sources further offers the possibility to achieve indistinguishability between multiple sources in Hong-Ou-Mandel experiments. Cooper pairs impinging stochastically at a mesoscopic beamsplitter have been successfully partitioned, as verified by measuring the coincidence of arrival. Here, we demonstrate the splitting of electron pairs generated on demand. Coincidence correlation measurements allow the reconstruction of the full counting statistics, revealing regimes of statistically independent, distinguishable or correlated partitioning, and have been envisioned as a source of information on the quantum state of the electron pair. The high pair-splitting fidelity opens a path to future on-demand generation of spin-entangled electron pairs from a suitably prepared two-electron quantum-dot ground state.

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