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Landau-Zener tunneling of fermi superfluid gases in deep BEC regime

机译：BEC深区中费米超流体气体的Landau-Zener隧穿

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摘要

The dynamical phenomena of the Landau-Zener tunneling of the superfluid fermi gases in a double-well potential in deep BEC regime is investigated in this paper. The contribution of the higher order term representing the lowest approximation of beyond mean field corrections is considered. By using the corresponding classical Hamiltonian of the system, the fixed points and adiabatic energy levels are studied. The critical parameter for the number of fixed points evolution from two to four is obtained. For the nonlinear Landau-Zener tunneling, the tunneling probability with sweeping rate α is numerically given. At the adiabatic limit, the tunneling probability is not zero in certain regime, while it goes to zero in the other regime. Exponential dependence of the transition probability on the sweeping rate α in certain case is obtained.
机译：本文研究了在深层BEC模式下双流势中超流体费米气体的Landau-Zener隧穿动力学现象。考虑了代表超出平均场校正的最低近似值的高阶项的贡献。通过使用系统的相应经典哈密顿量，研究了固定点和绝热能级。获得了定点从2个进化为4个的关键参数。对于非线性Landau-Zener隧穿，数值给出了扫掠速率为α的隧穿概率。在绝热极限下，在某些情况下隧穿概率不为零，而在其他情况下则为零。在某些情况下，获得了转移概率对扫描速率α的指数依赖性。

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