论文标题
Weber编号和量子液滴之间二进制碰撞的结果
Weber number and the outcome of binary collisions between quantum droplets
论文作者
论文摘要
据报道，在可行的实验条件下量子液滴的二元碰撞的理论分析。考虑由由超冷原子的二进制混合物组成的简并稀释叶气体形成的液滴。基于对随机相近似中其基态的低能激励的研究，引入了液滴表面张力的可靠表达式。考虑到对无与伦比定理的预期激发能量的估计，对它们的相关性进行了评估。表面张力表达式允许计算碰撞中涉及的液滴的韦伯数量。从量子液滴的合并到它们的分解到较小的液滴的二元额叶碰撞结果的几种制度。量子和异核混合物都定量了从自我蒸发和三体散射中得出的液滴的原子损失。它们的控制是必须观察到液滴碰撞引起的一些有趣效果的必要条件。
A theoretical analysis of binary collisions of quantum droplets under feasible experimental conditions is reported. Droplets formed from degenerate dilute Bose gases made up from binary mixtures of ultra cold atoms are considered. Reliable expressions for the surface tension of the droplets are introduced based on a study of low energy excitations of their ground state within the random phase approximation. Their relevance is evaluated considering an estimation of the expected excitation energy having in mind the Thouless variational theorem. The surface tension expressions allow calculating the Weber number of the droplets involved in the collisions. Several regimes on the outcomes of the binary frontal collisions that range from the coalescence of the quantum droplets to their disintegration into smaller droplets are identified. Atoms losses of the droplets derived from self-evaporation and three-body scattering are quantified for both homo- and hetero-nuclear mixtures. Their control is mandatory for the observation of some interesting effects arising from droplets collisions.
