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Frequency Comparison of Two High-Accuracy Al+ Optical Clocks

C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, and T. Rosenband
Phys. Rev. Lett. 104, 070802 – Published 17 February 2010
Physics logo See Synopsis: Better timing with aluminum ions

Abstract

We have constructed an optical clock with a fractional frequency inaccuracy of , based on quantum logic spectroscopy of an ion. A simultaneously trapped ion serves to sympathetically laser cool the ion and detect its quantum state. The frequency of the clock transition is compared to that of a previously constructed optical clock with a statistical measurement uncertainty of . The two clocks exhibit a relative stability of , and a fractional frequency difference of , consistent with the accuracy limit of the older clock.

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  • Received 23 November 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.070802

Synopsis

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Better timing with aluminum ions

Published 1 March 2010

Researchers have constructed a new high accuracy optical clock based on quantum spectroscopy of an aluminum ion.

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Authors & Affiliations

C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, and T. Rosenband

  • Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA

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Issue

Vol. 104, Iss. 7 — 19 February 2010

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