Deterministically entangling multiple remote quantum memories inside an optical cavity

Zhihui Yan, Yanhong Liu, Jieli Yan, and Xiaojun Jia
Phys. Rev. A 97, 013856 – Published 31 January 2018

Abstract

Quantum memory for the nonclassical state of light and entanglement among multiple remote quantum nodes hold promise for a large-scale quantum network, however, continuous-variable (CV) memory efficiency and entangled degree are limited due to imperfect implementation. Here we propose a scheme to deterministically entangle multiple distant atomic ensembles based on CV cavity-enhanced quantum memory. The memory efficiency can be improved with the help of cavity-enhanced electromagnetically induced transparency dynamics. A high degree of entanglement among multiple atomic ensembles can be obtained by mapping the quantum state from multiple entangled optical modes into a collection of atomic spin waves inside optical cavities. Besides being of interest in terms of unconditional entanglement among multiple macroscopic objects, our scheme paves the way towards the practical application of quantum networks.

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  • Received 11 August 2017
  • Revised 28 December 2017

DOI:https://doi.org/10.1103/PhysRevA.97.013856

©2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Atomic, Molecular & Optical

Authors & Affiliations

Zhihui Yan1,2,*, Yanhong Liu1, Jieli Yan1, and Xiaojun Jia1,2

  • 1State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, People's Republic of China
  • 2Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, People's Republic of China

  • *zhyan@sxu.edu.cn

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Vol. 97, Iss. 1 — January 2018

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