Experimental Time-Resolved Interference with Multiple Photons of Different Colors

Xu-Jie Wang, Bo Jing, Peng-Fei Sun, Chao-Wei Yang, Yong Yu, Vincenzo Tamma, Xiao-Hui Bao, and Jian-Wei Pan
Phys. Rev. Lett. 121, 080501 – Published 22 August 2018
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Abstract

Interference of multiple photons via a linear-optical network has profound applications for quantum foundation, quantum metrology, and quantum computation. Particularly, a boson sampling experiment with a moderate number of photons becomes intractable even for the most powerful classical computers. Scaling up from small-scale experiments requires highly indistinguishable single photons, which may be prohibited for many physical systems. Here we report a time-resolved multiphoton interference experiment by using photons not overlapping in their frequency spectra from three atomic-ensemble quantum memories. Time-resolved measurement enables us to observe nonclassical multiphoton correlation landscapes, which agree well with theoretical calculations. Symmetries in the landscapes are identified to reflect symmetries of the optical network. Our experiment can be further extended to realize boson sampling with many photons and plenty of modes, which thus may provide a route towards quantum supremacy with nonidentical photons.

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  • Received 29 March 2018
  • Revised 26 June 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.080501

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & Optical

Authors & Affiliations

Xu-Jie Wang1,2,3, Bo Jing1,2,3, Peng-Fei Sun1,2,3, Chao-Wei Yang1,2,3, Yong Yu1,2,3, Vincenzo Tamma4,5, Xiao-Hui Bao1,2,3,*, and Jian-Wei Pan1,2,3,†

  • 1Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, 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
  • 3CAS-Alibaba Quantum Computing Laboratory, Shanghai 201315, China
  • 4School of Mathematics and Physics, University of Portsmouth, Portsmouth PO1 3QL, United Kingdom
  • 5Institute of Cosmology & Gravitation, University of Portsmouth, Portsmouth PO1 3FX, United Kingdom

  • *xhbao@ustc.edu.cn
  • pan@ustc.edu.cn

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Issue

Vol. 121, Iss. 8 — 24 August 2018

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