Exploring potential applications of optical lattice clocks in a plate subduction zone
Exploring potential applications of optical lattice clocks in a plate subduction zone
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DOI：
10.1007/s00190-021-01548-y
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发表时间：
2021-07
影响因子：
4.4
通讯作者：
Yoshiyuki Tanaka;H. Katori
中科院分区：
文献类型：
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作者：
Yoshiyuki Tanaka;H. Katori
光学钟将最先进的铯原子钟的精度提高了两个数量级以上，并使频率比较的不确定度达到1018分之一。两个这样的时钟的引力红移允许确定它们的高度差，不确定度为1厘米。在欧洲，为了统一高度参考系统，人们广泛地进行了精密水准测量。水准测量的时间响应可以在数小时的平均时间内监测厘米的高度变化，这可能为探索地震学和火山学提供新的机会。光学晶格钟的超级稳定性将最好地用于这样的应用。本文概述了日本精密计时水准的发展前景。将光学晶格钟与现有的全球导航卫星系统观测网络相结合，今后可对地壳变形进行前所未有的精确监测。
Optical clocks improved the accuracy of state-of-the-art cesium clocks by more than two orders of magnitude and enabled frequency comparison with a fractional uncertainty of one part in 1018. Gravitational redshift of two such clocks allows determining their height difference with an uncertainty of 1 cm. In Europe, chronometric leveling has been extensively conducted for unifying the height reference systems. Temporal response of the leveling, which affords monitoring a cm height variation within hours of averaging time, may offer new opportunities to explore seismology and volcanology. Superb stability of optical lattice clocks will be best used for such applications. This article outlines the prospects of chronometric leveling in Japan. Combining optical lattice clocks with an existing observation network of GNSS, crustal deformations may be monitored with unprecedented accuracy in the future.