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The European Physical Journal B

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

Ming Yan, Wen-Shan Duan, Fu-Quan Dou, Xueqiang Gou, Heng Zhang

Published Aug 1, 2014• 1 citation
Publisher
DOI
10.1140/epjb/e2014-50161-x

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We investigate the tunneling dynamics of the Fermi gases in an optical lattice in the Bose–Einstein condensation (BEC) regime. The three critical scattering lengths and the system energies are found in different cases of Josephson oscillation (JO), oscillating-phase-type self-trapping (OPTST), running-phase-type self-trapping (RPTST), and self-trapping (ST). It is found that the s-wave scattering lengths have a crucial role on the tunneling dynamics. By adjusting the scattering length in the adiabatic condition, the transition probability changes with the adiabatic periodicity and a rectangular periodic pattern emerges. The periodicity of the rectangular wave depends on the system parameters such as the periodicity of the adjustable parameter, the s-wave scattering length.