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一个基于连贯人口捕获的冷原子束时钟

John D Elgin^1,2, Thomas P Heavner¹, John Kitching¹

¹Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA.

Applied physics letters

|November 13, 2024

概括

这项研究介绍了一种使用冷的鲁比-87原子进行精确计时的新原子钟. 时钟实现了出色的短期稳定性,对于先进的计时应用至关重要.

科学领域:

原子物理原子物理
量子光学是一种量子光学.
计量学计量学计量学

背景情况:

原子钟对于现代技术和科学研究至关重要.
开发更稳定,更准确的原子钟是一个持续的挑战.

研究的目的:

介绍一款新型原子钟的设计和性能.
为了证明使用冷原子和拉姆西审讯来提高时钟稳定性的有效性.

主要方法:

使用一束冷的鲁比-87 (87Rb) 原子,由一个2D+-磁光学陷产生.
在87Rb D2线上使用空间分离的Ramsey连贯人口捕获审讯.
实施了一种反传播的σ+-σ−探测方案,用于光场探测.

主要成果:

由于使用冷原子,实现了狭窄的Ramsey边缘,即使有小的询问区分离 (4.6厘米).
原子钟的短期稳定性为3 × 10−11/√τ.
在6.834 GHz的超精度时钟过渡成功地被询问.

结论:

冷原子技术与拉姆齐审讯相结合,为高性能原子钟提供了可行的途径.
呈现的原子钟设计显示出对需要精确计时的应用具有前景.

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