期刊
SCIENCE
卷 341, 期 6151, 页码 1215-1218出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1240420
关键词
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资金
- Defense Advanced Research Projects Agency Quantum Assisted Sensing and Readout program
- NASA Fundamental Physics
- NIST
Atomic clocks have been instrumental in science and technology, leading to innovations such as global positioning, advanced communications, and tests of fundamental constant variation. Timekeeping precision at 1 part in 10(18) enables new timing applications in relativistic geodesy, enhanced Earth- and space-based navigation and telescopy, and new tests of physics beyond the standard model. Here, we describe the development and operation of two optical lattice clocks, both using spin-polarized, ultracold atomic ytterbium. A measurement comparing these systems demonstrates an unprecedented atomic clock instability of 1.6 x 10(-18) after only 7 hours of averaging.
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