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APS » Journals » Phys. Rev. Lett. » Volume 98 » Issue 8
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Phys. Rev. Lett. 98, 083002 (2007) [4 pages]

87Sr Lattice Clock with Inaccuracy below 10-15

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Martin M. Boyd, Andrew D. Ludlow, Sebastian Blatt, Seth M. Foreman, Tetsuya Ido*, Tanya Zelevinsky, and Jun Ye
JILA, National Institute of Standards and Technology and University of Colorado, Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA

Received 7 November 2006; published 21 February 2007

Aided by ultrahigh resolution spectroscopy, the overall systematic uncertainty of the 1S0-3P0 clock resonance for lattice-confined 87Sr has been characterized to 9×10-16. This uncertainty is at a level similar to the Cs-fountain primary standard, while the potential stability for the lattice clocks exceeds that of Cs. The absolute frequency of the clock transition has been measured to be 429 228 004 229 874.0(1.1) Hz, where the 2.5×10-15 fractional uncertainty represents the most accurate measurement of a neutral-atom-based optical transition frequency to date.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.083002
DOI:
10.1103/PhysRevLett.98.083002
PACS:
32.80.Qk, 42.62.Eh, 42.62.Fi

*Present address: NICT, Tokyo, Japan.

 
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