期刊
PHYSICAL REVIEW RESEARCH
卷 3, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.3.L032054
关键词
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资金
- Australian Research Council Centre of Excellence for Quantum Computation and Communication Technology [CE170100012]
- Commonwealth of Australia Defence Science and Technology Group
This study demonstrates a quantum memory spectral preparation strategy that optimizes memory efficiency and bandwidth in materials such as Er-167(3+):Y2SiO5 in a high-field regime, resolving hyperfine structure. By preparing spectrally isolated absorbing features, an atomic frequency comb is created, and quantum storage of 200-ns pulses is achieved with 22% efficiency. Future experimental improvements aim to reach material limits of O(1)-s spin-state storage, O(100) MHz bandwidth, and >90% efficiency.
We describe a quantum memory spectral preparation strategy that optimizes memory efficiency and bandwidth in materials such as Er-167(3+):Y2SiO5 in a high-field regime, where the hyperfine structure is resolved. We demonstrate the method in 167 Er-167(3+):Y2SiO5 by preparing spectrally isolated 18-dB-absorbing features on a <1 dB background. Using these features we create an atomic frequency comb and show a quantum storage of 200-ns pulses with 22% efficiency, limited by the background absorption which arises from laser instability. We describe the experimental improvements needed to reach the material limits: O(1)-s spin-state storage, O(100) MHz bandwidth, and >90% efficiency.
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