论文标题
观察$^6 $ li和$^{41} $ k Atoms的Bose-Fermi混合物中州对状态超细碰撞的观察
Observation of state-to-state hyperfine-changing collision in a Bose-Fermi mixture of $^6$Li and $^{41}$K atoms
论文作者
论文摘要
超细碰撞是研究超低异核混合物的基本兴趣。在这里，我们报告了$^6 $ li和$^{41} $ k Atoms的Bose-Fermi混合物中的超精细转化动力学的状态研究。直接观察到碰撞产物，并测量旋转变化的动力学。基于两体碰撞模型，实验结果同时拟合了旋转变化的速率系数为$ 1.9（2）\ times 10^{ - 12}〜\ rm {cm^3 \ cdot s^{ - 1}} $，与多-Channel Defect量子计算。我们进一步表明，$^6 $ li-$^{41} $ k混合物的触点参数可以从测量的旋转变化动力学中提取。所获得的结果与弱相互作用的极限中的一级扰动理论一致。我们的系统为研究异核混合物中的旋转相互作用提供了巨大的希望。
Hyperfine-changing collisions are of fundamental interest for the studying of ultracold heteronuclear mixtures. Here, we report the state-to-state study of the hyperfine-changing-collision dynamics in a Bose-Fermi mixture of $^6$Li and $^{41}$K atoms. The collision products are directly observed and the spin-changing dynamics is measured. Based on a two-body collision model, the experimental results are simultaneously fitted from which the spin-changing rate coefficient of $ 1.9(2)\times 10^{-12}~\rm{cm^3\cdot s^{-1}}$ is gained, being consistent with the multi-channel quantum defect theory calculation. We further show that the contact parameter of $^6$Li-$^{41}$K mixture can be extracted from the measured spin-changing dynamics. The obtained results are consistent with the first order perturbation theory in the weakly-interacting limit. Our system offers great promise for studying spin-changing interactions in heteronuclear mixtures.
