PerspectiveATOMIC CLOCKS

Raising the Standards

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Science  23 Nov 2001:
Vol. 294, Issue 5547, pp. 1666-1668
DOI: 10.1126/science.1066928

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Summary

Accurate clocks play a fundamental role in science and technology. They play a key role in the Global Positioning System, serve as international timekeeping standards, and enable fundamental laws of physics to be tested. Atomic clocks are today's most accurate clocks. In his Perspective, Gill reports from a recent symposium, where first steps toward tomorrow's even more accurate optical clocks were reported.