论文标题
费米 - 果龙拉比动力学中的磨损和动量松弛：动力学方程方法
Decoherence and momentum relaxation in Fermi-polaron Rabi dynamics: a kinetic equation approach
论文作者
论文摘要
尽管费米 - 帕克龙模型具有范式的性质，但其非线性动力学的理论描述仍带来了挑战。在这里，我们将驱动极性子的量子动力学理论应用于超低原子的最新实验，其中报道了费米 - 帕伦状态与非相互作用水平之间的Rabi振荡。所得方程与动量松弛分离，其相应速率显示出对显微镜散射过程和准粒子特性的不同依赖性。我们描述了极性基态和激发的排斥孔状态，我们发现预测与可用的实验数据之间存在良好的定量一致性，而无需任何拟合参数。我们的方法不仅考虑了碰撞现象，而且还可以用来研究腐蚀性和碰撞碰撞在Fermi气体的高度影响高度平衡的混合物中所起的不同作用。
Despite the paradigmatic nature of the Fermi-polaron model, the theoretical description of its nonlinear dynamics poses challenges. Here, we apply a quantum kinetic theory of driven polarons to recent experiments with ultracold atoms, where Rabi oscillations between a Fermi-polaron state and a non-interacting level were reported. The resulting equations separate decoherence from momentum relaxation, with the corresponding rates showing a different dependence on microscopic scattering processes and quasi-particle properties. We describe both the polaron ground state and the excited repulsive-polaron state and we find a good quantitative agreement between our predictions and the available experimental data without any fitting parameter. Our approach not only takes into account collisional phenomena, but also it can be used to study the different roles played by decoherence and the collisional integral in the strongly interacting highly-imbalanced mixture of Fermi gases.
