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Multiplexed storage and real-time manipulation based on a multiple degree-of-freedom quantum memory.


ABSTRACT: The faithful storage and coherent manipulation of quantum states with matter-systems would enable the realization of large-scale quantum networks based on quantum repeaters. To achieve useful communication rates, highly multimode quantum memories are required to construct a multiplexed quantum repeater. Here, we present a demonstration of on-demand storage of orbital-angular-momentum states with weak coherent pulses at the single-photon-level in a rare-earth-ion-doped crystal. Through the combination of this spatial degree-of-freedom (DOF) with temporal and spectral degrees of freedom, we create a multiple-DOF memory with high multimode capacity. This device can serve as a quantum mode converter with high fidelity, which is a fundamental requirement for the construction of a multiplexed quantum repeater. This device further enables essentially arbitrary spectral and temporal manipulations of spatial-qutrit-encoded photonic pulses in real time. Therefore, the developed quantum memory can serve as a building block for scalable photonic quantum information processing architectures.

SUBMITTER: Yang TS 

PROVIDER: S-EPMC6109076 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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Multiplexed storage and real-time manipulation based on a multiple degree-of-freedom quantum memory.

Yang Tian-Shu TS   Zhou Zong-Quan ZQ   Hua Yi-Lin YL   Liu Xiao X   Li Zong-Feng ZF   Li Pei-Yun PY   Ma Yu Y   Liu Chao C   Liang Peng-Jun PJ   Li Xue X   Xiao Yi-Xin YX   Hu Jun J   Li Chuan-Feng CF   Guo Guang-Can GC  

Nature communications 20180824 1


The faithful storage and coherent manipulation of quantum states with matter-systems would enable the realization of large-scale quantum networks based on quantum repeaters. To achieve useful communication rates, highly multimode quantum memories are required to construct a multiplexed quantum repeater. Here, we present a demonstration of on-demand storage of orbital-angular-momentum states with weak coherent pulses at the single-photon-level in a rare-earth-ion-doped crystal. Through the combin  ...[more]

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