Details
| Original language | English |
|---|---|
| Pages (from-to) | 46-49 |
| Number of pages | 4 |
| Journal | Nature nanotechnology |
| Volume | 10 |
| Issue number | 1 |
| Publication status | Published - 1 Jan 2015 |
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.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Bioengineering
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Engineering(all)
- Biomedical Engineering
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
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In: Nature nanotechnology, Vol. 10, No. 1, 01.01.2015, p. 46-49.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Partitioning of on-demand electron pairs
AU - Ubbelohde, Niels
AU - Hohls, Frank
AU - Kashcheyevs, Vyacheslavs
AU - Wagner, Timo
AU - Fricke, Lukas
AU - Kästner, Bernd
AU - Pierz, Klaus
AU - Schumacher, Hans W.
AU - Haug, Rolf J.
N1 - Funding information: The authors thank H. Marx, Th. Weimann and P. Mirovsky for the fabrication of the wafer material and the device. The authors (except V.K.) acknowledge financial support by the German Research Foundation, the Niedersachsen Institutes of Technology and (except T.M., R.J.H., and V.K.) the European Metrology Research Programme (EMRP) within the Joint Research Project ‘Quantum Ampere’ (JRP SIB07). The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union. V.K. has been supported by the Latvian Science Council.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84926080298&partnerID=8YFLogxK
U2 - 10.1038/nnano.2014.275
DO - 10.1038/nnano.2014.275
M3 - Article
AN - SCOPUS:84926080298
VL - 10
SP - 46
EP - 49
JO - Nature nanotechnology
JF - Nature nanotechnology
SN - 1748-3387
IS - 1
ER -