^{115} 在^{+}-^{172} Yb^{+} 库伦水晶时钟与2.5×10^{-18} 系统不确定性
H N Hausser1, J Keller1, T Nordmann1
1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
Physical review letters
|February 6, 2025
概括
我们开发了一个新的原子钟,使用离子 (In+) 和离子 (Yb+) 进行精确的计时. 这种混合物种钟实现了前所未有的准确性,改善了频率测量和与其他领先的原子钟进行比较.
科学领域:
- 原子物理 原子物理
- 量子计量学 量子计量学
- 光学时钟的使用方法
背景情况:
- 原子钟对于基础物理测试和计时至关重要.
- 以前的时钟在准确性和稳定性方面面临限制.
- 混合物种离子晶体为克服这些局限性提供了一个有希望的方法.
研究的目的:
- 为了呈现一个可扩展的混合物种库伦水晶原子钟.
- 为了利用 ^{1}S_{0}^{3}P_{0} 过渡在 ^{115}In^{+} 时钟操作.
- 为了实现高精度的频率测量和比较.
主要方法:
- 在库伦晶体中捕捉 ^{115}In^{+} 和 ^{172}Yb^{+} 离子.
- 使用 ^{172}Yb^{+} 离子进行交感冷却.
- 使用一个有条件的准备序列与合控制可重复的询问.
主要成果:
- 使用1In^{+}-3Yb^{+}晶体演示了时钟操作,实现了2.5×10^{-18}的相对系统不确定性.
- 报告了绝对频率测量结果,不确定性为1.3×10^{-16}.
- 在{115}In^{+}和{171}Yb^{+} (E3) 时钟之间实现了迄今为止最准确的频率比测量,分数不确定性为4.4×10^{-18}.
结论:
- 混合物库伦布水晶时钟为高精度计时提供了一个可扩展的平台.
- 这项工作显著改善了频率比测量,特别是在{115}In^{+}/^{87}Sr.
- 开发的时钟技术为未来的计量学和基础科学进步铺平了道路.
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