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On-Demand Semiconductor Source of Entangled Photons Which Simultaneously Has High Fidelity, Efficiency, and Indistinguishability

Hui Wang, Hai Hu, T.-H. Chung, Jian Qin, Xiaoxia Yang, J.-P. Li, R.-Z. Liu, H.-S. Zhong, Y.-M. He, Xing Ding, Y.-H. Deng, Qing Dai, Y.-H. Huo, Sven Höfling, Chao-Yang Lu, and Jian-Wei Pan
Phys. Rev. Lett. 122, 113602 – Published 22 March 2019
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Abstract

An outstanding goal in quantum optics and scalable photonic quantum technology is to develop a source that each time emits one and only one entangled photon pair with simultaneously high entanglement fidelity, extraction efficiency, and photon indistinguishability. By coherent two-photon excitation of a single InGaAs quantum dot coupled to a circular Bragg grating bull’s-eye cavity with a broadband high Purcell factor of up to 11.3, we generate entangled photon pairs with a state fidelity of 0.90(1), pair generation rate of 0.59(1), pair extraction efficiency of 0.62(6), and photon indistinguishability of 0.90(1) simultaneously. Our work will open up many applications in high-efficiency multiphoton experiments and solid-state quantum repeaters.

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  • Received 6 December 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.113602

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Synopsis

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Entangled Photon Source Ticks All Boxes

Published 22 March 2019

A quantum-dot-based device combines all of the attributes necessary for producing a reliable source of entangled photons for quantum information applications. 

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Authors & Affiliations

Hui Wang1,2, Hai Hu3, T.-H. Chung1,2, Jian Qin1,2, Xiaoxia Yang3, J.-P. Li1,2, R.-Z. Liu1,2, H.-S. Zhong1,2, Y.-M. He1,2, Xing Ding1,2, Y.-H. Deng1,2, Qing Dai3,*, Y.-H. Huo1,2,†, Sven Höfling1,4,5, Chao-Yang Lu1,2,‡, and Jian-Wei Pan1,2,§

  • 1Shanghai Branch, National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Shanghai 201315, China
  • 2CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 3Division of Nanophotonics, CAS center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
  • 4Technische Physik, Physikalisches Instität and Wilhelm Conrad Röntgen-Center for Complex Material Systems, Universitat Würzburg, Am Hubland, D-97074 Wüzburg, Germany
  • 5SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom

  • *daiq@nanoctr.cn
  • yongheng@ustc.edu.cn
  • cylu@ustc.edu.cn
  • §pan@ustc.edu.cn

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Issue

Vol. 122, Iss. 11 — 22 March 2019

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