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Self-trapping and its periodic modulation of superfluid Fermi gases in one-dimensional accelerating optical lattice from BEC to unitarity regime

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Abstract

We study the tunneling dynamics of superfluid Fermi gases in an optical lattice from BEC to unitarity regime. Four different cases are found, namely Josephson oscillations (JO), oscillating-phase-type self-trapping (OST), running-phase-type self-trapping (RST) and self-trapping (ST). We find that the s-wave scattering length has a crucial role on the tunneling dynamics. Periodic modulation can also affect the tunneling phenomena, for example, in the high frequency modulation, the optical lattice is splitted at the zero points of the zeroth order Bessel function J 0 and strong suppression of tunneling by the modulation is observed at these points.

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Authors and Affiliations

  1. College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou, 730070, P.R. China

    Ming Yan, Wen-Shan Duan, Fu-Quan Dou, Xue-Qiang Gou & Heng Zhang

Authors
  1. Ming Yan
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  2. Wen-Shan Duan
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  3. Fu-Quan Dou
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  4. Xue-Qiang Gou
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  5. Heng Zhang
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Correspondence to Wen-Shan Duan.

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Yan, M., Duan, WS., Dou, FQ. et al. Self-trapping and its periodic modulation of superfluid Fermi gases in one-dimensional accelerating optical lattice from BEC to unitarity regime. Eur. Phys. J. B 87, 180 (2014). https://doi.org/10.1140/epjb/e2014-50161-x

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  • DOI: https://doi.org/10.1140/epjb/e2014-50161-x

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