Quantum-dot spin–photon entanglement via frequency downconversion to telecom wavelength

Kristiaan De Greve (), Leo Yu, Peter L. McMahon, Jason S. Pelc, Chandra M. Natarajan, Na Young Kim, Eisuke Abe, Sebastian Maier, Christian Schneider, Martin Kamp, Sven Höfling, Robert H. Hadfield, Alfred Forchel, M. M. Fejer and Yoshihisa Yamamoto
Additional contact information
Kristiaan De Greve: E. L. Ginzton Laboratory, Stanford University
Leo Yu: E. L. Ginzton Laboratory, Stanford University
Peter L. McMahon: E. L. Ginzton Laboratory, Stanford University
Jason S. Pelc: E. L. Ginzton Laboratory, Stanford University
Chandra M. Natarajan: E. L. Ginzton Laboratory, Stanford University
Na Young Kim: E. L. Ginzton Laboratory, Stanford University
Eisuke Abe: E. L. Ginzton Laboratory, Stanford University
Sebastian Maier: Technische Physik, Physikalisches Institut, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
Christian Schneider: Technische Physik, Physikalisches Institut, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
Martin Kamp: Technische Physik, Physikalisches Institut, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
Sven Höfling: E. L. Ginzton Laboratory, Stanford University
Robert H. Hadfield: Scottish Universities Physics Alliance and School of Engineering and Physical Sciences, Heriot-Watt University
Alfred Forchel: Technische Physik, Physikalisches Institut, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
M. M. Fejer: E. L. Ginzton Laboratory, Stanford University
Yoshihisa Yamamoto: E. L. Ginzton Laboratory, Stanford University

Nature, 2012, vol. 491, issue 7424, 421-425

Abstract: Entanglement of the spin of an electron in a semiconductor quantum dot with a single photon is reported, and verified by means of time-resolved frequency downconversion to a telecommunications wavelength; this process is an essential requirement for future quantum networks.

Date: 2012
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DOI: 10.1038/nature11577

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