Rabi spectroscopy and excitation inhomogeneity in a one-dimensional optical lattice clock

S. Blatt, J. W. Thomsen, G. K. Campbell, A. D. Ludlow, M. D. Swallows, M. J. Martin, M. M. Boyd, and J. Ye
Phys. Rev. A 80, 052703 – Published 6 November 2009

Abstract

We investigate the influence of atomic motion on precision Rabi spectroscopy of ultracold fermionic atoms confined in a deep one-dimensional optical lattice. We analyze the spectral components of longitudinal sideband spectra and present a model to extract information about the transverse motion and sample temperature from their structure. Rabi spectroscopy of the clock transition itself is also influenced by atomic motion in the weakly confined transverse directions of the optical lattice. By deriving Rabi flopping and Rabi line shapes of the carrier transition, we obtain a model to quantify trap-state-dependent excitation inhomogeneities. The inhomogeneously excited ultracold fermions become distinguishable, which allows s-wave collisions. We derive a detailed model of this process and explain observed density shift data in terms of a dynamic mean-field shift of the clock transition.

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  • Received 8 June 2009

DOI:https://doi.org/10.1103/PhysRevA.80.052703

©2009 American Physical Society

Authors & Affiliations

S. Blatt*, J. W. Thomsen, G. K. Campbell, A. D. Ludlow, M. D. Swallows, M. J. Martin, M. M. Boyd§, and J. Ye

  • JILA, National Institute of Standards and Technology and University of Colorado, Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA

  • *sebastian.blatt@colorado.edu
  • Permanent address: The Niels Bohr Institute, Universitetsparken 5, 2100 Copenhagen, Denmark.
  • Present address: Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
  • §Present address: AOSense Inc., 767 N. Mary Ave., Sunnyvale, CA 94085-2909, USA.

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Vol. 80, Iss. 5 — November 2009

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