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APS » Journals » Phys. Rev. Lett. » Volume 94 » Issue 15
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Phys. Rev. Lett. 94, 153001 (2005) [4 pages]

Precision Spectroscopy and Density-Dependent Frequency Shifts in Ultracold Sr

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Tetsuya Ido, Thomas H. Loftus*, Martin M. Boyd, Andrew D. Ludlow, Kevin W. Holman, and Jun Ye
JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA

Received 15 October 2004; published 18 April 2005

By varying the density of an ultracold 88Sr sample from 109 to>1012  cm-3, we make the first definitive measurement of the density-related frequency shift and linewidth broadening of the 1S0-3P1 optical clock transition in an alkaline earth system. In addition, we report the most accurate measurement to date of the 88Sr 1S0-3P1 optical clock transition frequency. Including a detailed analysis of systematic errors, the frequency is [434  829  121  312  334±20(stat)±33(syst)]  Hz.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.153001
DOI:
10.1103/PhysRevLett.94.153001
PACS:
42.62.Eh, 32.70.Jz, 32.80.−t, 42.62.Fi

*Present address: Aculite, Bothell, WA 98011, USA.

 
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