Single-atom optical clocks

DIPC Seminars

David J. Wineland, NIST, Boulder, Colorado - Nobel Laureate in Physics 2012
Donostia International Physics Center. Pº Manuel Lardizabal 4, Donostia - San Sebastián
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Single-atom optical clocks With the availability of spectrally pure lasers and the ability to precisely measure optical frequencies, it appears the era of optical atomic clocks has begun. In one clock project at NIST we have used a single trapped Al+ ion to make a clock based on an ultraviolet transition. With single ions uncertainties in systematic effects are smallest, reaching a fractional error of Df/f0 = 8.0 x 10-18. At this level, many interesting effects, including those due to special and general relativity, must be calibrated and corrected for.