Towards a compact, optically interrogated, cold-atom microwave clock
Towards a compact, optically interrogated, cold-atom microwave clock
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DOI：
10.1515/aot-2020-0022
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发表时间：
2019-09
影响因子：
1.8
通讯作者：
Rachel Elvin;Michael W. Wright;B. Lewis;B. Keliehor;A. Bregazzi;J. McGilligan;A. Arnold;P. Griffin;E. Riis
中科院分区：
文献类型：
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作者：
Rachel Elvin;Michael W. Wright;B. Lewis;B. Keliehor;A. Bregazzi;J. McGilligan;A. Arnold;P. Griffin;E. Riis
摘要一个紧凑的冷原子平台为便携式，鲁棒性和可访问的量子传感器提供了一系列令人兴奋的可能性。在这项工作中，我们报告的发展，冷原子微波钟在一个小的包装。我们的工作利用光栅磁光阱和高对比度相干布居捕获在lin偏振计划。我们用光学方法研究了冷87 Rb原子在自由落体过程中的基态分裂。我们已经测量了5×10−11/τ$5{\times}{10}^{-11}/\sqrt{\tau }$的短期分数频率稳定度，预计量子投影噪声限制在10−13/τ${10}^{-13}/\sqrt{\tau }$水平。
Abstract A compact platform for cold atoms opens a range of exciting possibilities for portable, robust and accessible quantum sensors. In this work, we report on the development of a cold-atom microwave clock in a small package. Our work utilises the grating magneto-optical trap and high-contrast coherent population trapping in the lin⊥$\perp $lin polarisation scheme. We optically probe the atomic ground-state splitting of cold 87Rb atoms using a Ramsey-like sequence whilst the atoms are in free-fall. We have measured a short-term fractional frequency stability of 5×10−11/τ$5{\times}{10}^{-11}/\sqrt{\tau }$ with a projected quantum projection noise limit at the 10−13/τ${10}^{-13}/\sqrt{\tau }$ level.