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与多重光学晶格时钟的差分时钟比较
Xin Zheng1, Jonathan Dolde1, Varun Lochab1
1University of Wisconsin-Madison, Madison, WI, USA.
Nature
|February 17, 2022
概括
这项研究引入了多重光学晶格时钟,克服了局部振荡器的局限性,以提高计时效果. 这种新的原子钟设计实现了前所未有的稳定性和精度,
科学领域:
- 原子,分子和光学物理学
- 量子计量学
- 精确测量
背景情况:
- 光学原子钟已经推进了计时,计量学和量子科学.
- 时钟的不稳定性往往受到局部振荡器的限制, 而不是原子本身.
研究的目的:
- 实现一个新的"多维"一维光学晶格时钟.
- 为了克服光学时钟局部振荡器不稳定的局限性.
- 在精密测量和基础科学中实现新的应用.
主要方法:
- 使用一维光学晶格捕获空间分辨率的原子组合.
- 同时通过共享时钟激光对多个组合进行审讯.
- 使用并行读取和同步的Ramsey询问组合对.
主要成果:
- 实现了26秒的原子-原子相干时间,比原子-激光相干提高了270倍.
- 在3.3小时后显示出[公式:见文本]的相对不稳定性和8.9 × 10-20的统计不确定性.
- 建立了一个小型的时钟网络,有6个组合和15个对对比,显示下面的相对不稳定性.
- 准备的四种稳定的同位素的空间分辨,异质组合对.
结论:
- 多重时钟设计有效地绕过了局部振荡器的不稳定性限制.
- 这项技术可实现高精度的同位素转移测量和时钟系统的表征.
- 这为基于时钟的探测器铺平了道路, 探测引力波,
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