兴奋频段连贯移位,以提高光学格子时钟性能
J L Siegel1,2, W F McGrew1,2, Y S Hassan1,2
1National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
Physical review letters
|April 13, 2024
概括
在激发的格子带中连贯移位,通过降低原子密度来改善原子钟的性能. 这种方法通过抑制-171原子钟中的碰撞和原子损失来增强系统的不确定性和不稳定性.
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:
- 原子钟对于精确的计时至关重要.
- 改善系统的不确定性和不稳定性是原子钟性能的主要挑战.
- 冷碰撞转移和两体损失降低了时钟的准确性.
研究的目的:
- 在激发的格子带中实现连贯的移位,以提高原子钟的性能.
- 为了抑制冷碰撞转移和Yb原子中的两体损失.
- 研究移位对原子空间分布和时钟指标的影响.
主要方法:
- 在为 ^{171}Yb 原子激发的格子带中实现了连贯的移位.
- 使用垂直定向的光学网格.
- 测量了陷灯诱导的火率和激发状态的自然寿命.
主要成果:
- 原子的空间分布增加了大约7倍.
- 降低了冷碰撞转移的6.5 ((8) 倍.
- 使不弹性两体损失可以忽略不计.
- 测量陷灯诱导的火率为5.7(7) ×10^{-4} E_{r}^{-1} s^{-1} 和自然寿命为19(2) s.
结论:
- 激发格子带中的连贯移位是改善原子钟性能的有效工具.
- 这种技术显著减少了系统的不确定性和不稳定性.
- 这些发现为更精确的原子钟铺平了道路.
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