Deterministically entangling multiple remote quantum memories inside an optical cavity

被引：8
作者：
Yan, Zhihui [1 ,2 ]
Liu, Yanhong [1 ]
Yan, Jieli [1 ]
Jia, Xiaojun [1 ,2 ]
机构：
[1] Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China
[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
来源：
PHYSICAL REVIEW A | 2018年 / 97卷 / 01期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
ELECTROMAGNETICALLY INDUCED TRANSPARENCY; ATOMIC ENSEMBLES; LINEAR OPTICS; SINGLE-PHOTON; ENTANGLEMENT; SPIN; STATE; OSCILLATOR; EFFICIENT; TIME;
D O I：
10.1103/PhysRevA.97.013856
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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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页数：9
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