| Zugriffsnummer | 33503 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Partitioning of on-demand electron pairs |
| Autor(in); Institution |
Ubbelohde, Niels; Leibniz Universität Hannover, Institut für Festkörperphysik, Hannover, GERMANY
Hohls, Frank; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Kashcheyevs, Vyacheslavs; University of Latvia, Faculty of Physics and Mathematics, Riga, LATVIA
Wagner, Timo; Leibniz Universität Hannover, Institut für Festkörperphysik, Hannover, GERMANY
Fricke, Lukas; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Kästner, Bernd; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Pierz, Klaus; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Schumacher, Hans Werner; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Haug, Rolf J.; Leibniz Universität Hannover, Institut für Festkörperphysik, Hannover, GERMANY
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| Quelle/Jahr | Nature Nanotechnology: 10 (2015), 1, 46 - 49 |
| ISSN | 1748-3387 (PRINT) ; 1748-3395 |
| DOI | |
| URL | |
| Verlag | London [u.a.]: Nature Publishing Group |
| Zusammenfassung | 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. |
