Multiplexing heralded single photons in orbital-angular-momentum space

Shi-long Liu, Qiang Zhou, Zhi-yuan Zhou, Shi-kai Liu, Yan Li, Yin-hai Li, Chen Yang, Zhao-huai Xu, Guang-can Guo, and Bao-sen Shi
Phys. Rev. A 100, 013833 – Published 16 July 2019

Abstract

A heralded single-photon source (HSPS) with competitive single-photon purity and indistinguishability has become an essential resource for photonic quantum information processing. Here we propose a theoretical regime to enhance heralded single-photon generation by multiplexing the degree of freedom of orbital angular momentum (OAM) of down-converted entangled photon pairs emitted from a nonlinear crystal. Experimentally, a proof-of-principle experiment is performed through multiplexing three OAM modes. We achieve a 47% enhancement in the single-photon rate. A second-order autocorrelation function g(2)(0)<0.5 ensures our multiplexed heralded single photons with good single-photon purity. We further indicate that an OAM-multiplexed HSPS with high quality can be constructed by generating higher-dimensional entangled states and sorting them with high efficiency in OAM space. Our method may approach a good HSPS with the deterministic property.

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  • Received 8 October 2018

DOI:https://doi.org/10.1103/PhysRevA.100.013833

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Shi-long Liu1, Qiang Zhou1,2,*, Zhi-yuan Zhou1,3,†, Shi-kai Liu1, Yan Li1, Yin-hai Li1, Chen Yang1, Zhao-huai Xu1, Guang-can Guo1,2,3, and Bao-sen Shi1,3,‡

  • 1Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 2Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu 610054, China and School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 3Heilongjiang Provincial Key Laboratory of Quantum Regulation and Control, Wang Da-Heng Collaborative Innovation Center, Harbin University of Science and Technology, Harbin 150080, China

  • *zhouqiang@uestc.edu.cn
  • zyzhouphy@ustc.edu.cn
  • drshi@ustc.edu.cn

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Issue

Vol. 100, Iss. 1 — July 2019

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