Open AccessStrontium optical lattice clock
Author(s) -
YangI Lin,
Zhongyuan Fang
Publication year - 2018
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.67.20181097
Subject(s) - strontium , optical lattice , lattice (music) , caesium , atomic clock , frequency standard , fountain , physics , computer science , optics , computational physics , condensed matter physics , acoustics , nuclear physics , superfluidity , archaeology , history
The strontium optical lattice clock has experienced a rapid development since the beginning of the 21st century. Its relative frequency uncertainty, on the order of 10-18, has surpassed that of the cesium fountain clock, the current primary standard for time and frequency. This supreme level of precision reflects one of the most advanced measurement capabilities of mankind. This article reviews the current progress of the strontium optical lattice clock, and describes its key components and techniques, including high-resolution spectroscopy, close-loop operation, evaluation of systematic shifts, and absolute frequency measurement. The applications and future outlook of the strontium clock are also summarized.