标题： 镝和铒原子与碱金属和碱土金属原子相互作用的范德华系数 显示英文标题

标题： Van der Waals coefficients for interactions of dysprosium and erbium atoms with alkali-metal and alkaline-earth-metal atoms

摘要： 长程原子间相互作用在超冷气体的碰撞动力学中起着重要作用。 在这里，我们报告了表征镝或铒原子在两个最低能级与碱金属（Li、Na、K、Rb、Cs、Fr）或碱土金属（Be、Mg、Ca、Sr、Ba）原子之间范德瓦尔斯相互作用的各向同性和各向异性$C_6$系数的计算。 计算是通过两个相互作用原子在所谓虚频率下的动态偶极极化率的积分来完成的。 对于所有原子对，我们发现各向同性$C_6$系数比各向异性系数大两到三个数量级。 这些系数对于模拟包含高度磁性的镝或铒原子以及碱金属或碱土金属原子的异核量子混合物的碰撞性质至关重要。 显示英文摘要

摘要： The long-range part of the interatomic interactions plays a substantial role in the collisional dynamics of ultracold gases. Here, we report on the calculation of the isotropic and anisotropic $C_6$ coefficients characterizing the van der Waals interaction between dysprosium or erbium atoms in the two lowest energy levels and the ground-state alkali-metal (Li, Na, K, Rb, Cs, Fr) or alkaline-earth-metal (Be, Mg, Ca, Sr, Ba) atoms. The calculations are done using the integral of dynamic dipole polarizabilities at so-called imaginary frequencies of the two interacting atoms. For all atom pairs, we find that the isotropic $C_6$ coefficients are two or three orders of magnitude larger than the anisotropic ones. Those coefficients are essential for modeling collisional properties of heteronuclear quantum mixtures containing highly magnetic dysprosium or erbium atoms and alkali-metal or alkaline-earth-metal atoms.