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Phys. Rev. A 74, 053609 (2006) [10 pages]

Analysis of a magnetically trapped atom clock

D. Kadio1 and Y. B. Band1,2
1Departments of Chemistry and Electro-Optics, and The Ilse Katz Center for Nano-Science, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
2Atomic Physics Division, A267 Physics, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

Received 8 May 2006; revised 15 September 2006; published 8 November 2006

We consider optimization of a rubidium atom clock that uses magnetically trapped Bose condensed atoms in a highly elongated trap, and determine the optimal conditions for minimum Allan variance of the clock using microwave Ramsey fringe spectroscopy. Elimination of magnetic field shifts and collisional shifts are considered. The effects of spin-dipolar relaxation are addressed in the optimization of the clock. We find that for the interstate interaction strength equal to or larger than the intrastate interaction strengths, a modulational instability results in phase separation and symmetry breaking of the two-component condensate composed of the ground and excited hyperfine clock levels, and this mechanism limits the clock accuracy.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.74.053609
DOI: 10.1103/PhysRevA.74.053609
PACS: 03.75.Nt; 03.75.Kk; 03.75.Mn; 06.30.Ft
  • 03.75.Nt
    Other Bose-Einstein condensation phenomena
  • 03.75.Kk
    Dynamic properties of Bose-Einstein condensates; collective and hydrodynamic excitations, superfluid flow
  • 03.75.Mn
    Multicomponent Bose-Einstein condensates; spinor condensates
  • 06.30.Ft
    Time and frequency measurement
  • YEAR: 2006
KEYWORDS: rubidium, atomic clocks, radiation pressure, Bose-Einstein condensation, microwave spectra, spectral line shift

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