A Spin-1/2 Optical Lattice Clock

Published

August 7, 2009

Author(s)

Nathan D. Lemke, Andrew D. Ludlow, Zeb Barber, Tara M. Fortier, Scott A. Diddams, Yanyi Jiang, Steven R. Jefferts, Thomas P. Heavner, Thomas E. Parker, Christopher W. Oates

Abstract

We experimentally investigate an optical clock based on ¹⁷¹Yb (I = 1/2) atoms confined in an optical lattice. We have evaluated all known frequency shifts to the clock transition, including the density-dependent collision shift, with an uncertainty of 0.19 Hz, or 3.6× 10⁻¹⁶ fractionally, limited principally by uncertainty in the blackbody radiation Stark shift. We have measured the absolute clock transition frequency relative to the NIST-F1 Cs fountain clock and find the frequency to be 518 295 836 590 865.7(0.9) Hz.

Citation

Physical Review Letters

Volume

103

Pub Type

Journals

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Keywords

lasers, other standards, spectroscopy

Citation

Lemke, N. , Ludlow, A. , Barber, Z. , Fortier, T. , Diddams, S. , Jiang, Y. , Jefferts, S. , Heavner, T. , Parker, T. and Oates, C. (2009), A Spin-1/2 Optical Lattice Clock, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=901526 (Accessed April 16, 2024)