Quantum State Transfer from a Single Photon to a Distant Quantum-Dot Electron Spin

Yu He, Yu-Ming He, Yu-Jia Wei, Xiao Jiang, Kai Chen, Chao-Yang Lu, Jian-Wei Pan, Christian Schneider, Martin Kamp, and Sven Höfling
Phys. Rev. Lett. 119, 060501 – Published 8 August 2017
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Abstract

Quantum state transfer from flying photons to stationary matter qubits is an important element in the realization of quantum networks. Self-assembled semiconductor quantum dots provide a promising solid-state platform hosting both single photon and spin, with an inherent light-matter interface. Here, we develop a method to coherently and actively control the single-photon frequency bins in superposition using electro-optic modulators, and measure the spin-photon entanglement with a fidelity of 0.796±0.020. Further, by Greenberger-Horne-Zeilinger-type state projection on the frequency, path, and polarization degrees of freedom of a single photon, we demonstrate quantum state transfer from a single photon to a single electron spin confined in an InGaAs quantum dot, separated by 5 m. The quantum state mapping from the photon’s polarization to the electron’s spin is demonstrated along three different axes on the Bloch sphere, with an average fidelity of 78.5%.

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  • Received 10 April 2016

DOI:https://doi.org/10.1103/PhysRevLett.119.060501

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

Yu He, Yu-Ming He, Yu-Jia Wei, Xiao Jiang, Kai Chen, Chao-Yang Lu*, and Jian-Wei Pan

  • Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China

Christian Schneider and Martin Kamp

  • Technische Physik, Physikalisches Instität and Wilhelm Conrad Röntgen-Center for Complex Material Systems, Universitat Würzburg, Am Hubland, D-97074 Wüzburg, Germany

Sven Höfling

  • Technische Physik, Physikalisches Instität and Wilhelm Conrad Röntgen-Center for Complex Material Systems, Universitat Würzburg, Am Hubland, D-97074 Wüzburg, Germany
  • SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom

  • *cylu@ustc.edu.cn
  • pan@ustc.edu.cn
  • sven.hoefling@physik.uni-wuerzburg.de

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Issue

Vol. 119, Iss. 6 — 11 August 2017

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