Differential scattering and rethermalization in ultracold dipolar gases
Differential scattering and rethermalization in ultracold dipolar gases
复制标题
DOI：
10.1103/physreva.89.022702
复制
发表时间：
2014-02-05
影响因子：
2.9
通讯作者：
Jin, Deborah S.
中科院分区：
文献类型：
--
作者：
Bohn, John L.;Jin, Deborah S.
对于主要由于偶极相互作用而散射的超冷原子和分子的微分截面的解析表达式，导出了一阶玻恩近似，并显示与部分波展开一致。这些截面应用于横向再热化问题。引人注目的是，根据偶极子的取向，再热化的速率可以变化2倍之多。因此，各向异性的偶极-偶极相互作用甚至对非简并的超冷气体的行为也有显著的影响。
Analytic expressions for the differential cross sections of ultracold atoms and molecules that scatter primarily due to dipolar interactions are derived within the first-order Born approximation and are shown to agree with the partial wave expansion. These cross sections are applied to the problem of cross-dimensional rethermalization. Strikingly, the rate of rethermalization can vary by as much as a factor of 2, depending on the orientation of the dipoles. Thus the anisotropic dipole-dipole interaction can have a significant effect even on the behavior of a nondegenerate ultracold gas.