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An optical lattice clock

Masao Takamoto, Feng-Lei Hong, Ryoichi Higashi and Hidetoshi Katori ()
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Masao Takamoto: Engineering Research Institute, The University of Tokyo
Feng-Lei Hong: National Metrology Institute of Japan/National Institute of Advanced Industrial Science and Technology (NMIJ/AIST)
Ryoichi Higashi: Engineering Research Institute, The University of Tokyo
Hidetoshi Katori: Engineering Research Institute, The University of Tokyo

Nature, 2005, vol. 435, issue 7040, 321-324

Abstract: Time for a change Since the first practical caesium atomic clock was built in 1955 (by Louis Essen and John V. L. Parry, described in Nature 176; 280–285), work has gone on to improve the accuracy and stability of such devices. Trapped ions offer accuracy advantages, neutral atoms aid stability. A new device, the optical lattice clock, combines the best of both approaches and could point towards the next generation of atomic clocks. Using atoms trapped in an optical lattice as quantum references, this system has the potential to achieve a stability several orders of magnitude better than the caesium clock currently used to define the second as an SI unit.

Date: 2005
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DOI: 10.1038/nature03541

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