论文标题
在无序环境中具有有限范围相互作用的玻色子的有效现场理论
Effective field theory of bosons with finite-range interaction in a disordered environment
论文作者
论文摘要
我们研究了由无序环境的效果下的骨体碱金属原子制成的超速气体的低温性能。该疾病的统计表征是在有效的场理论形式主义中研究的，用于通用空间维度$ d $。转移到$ d = 3 $，在所有出现的分歧都适当地正规化的情况下，我们专注于冷凝水和超流体密度的消耗。在零温度下，我们获得了凝聚力分数和超流体分数的有意义的分析公式，这些公式考虑了散射长度，有效范围和无序强度之间的相互作用。
We investigate the low-temperature properties of a ultracold gas made of bosonic alkali-metal atoms with finite-range interaction under the effect of a disordered environment. The statistical characterization of the disorder is investigated within an effective-field-theory formalism for a generic spatial dimension $d$. Moving to $d=3$, where all the arising divergences are properly regularized, we focus on the depletion of both the condensate and superfluid densities. At zero temperature we obtain meaningful analytical formulas for the condensate fraction and the superfluid fraction which take into account the interplay among scattering length, effective range, and disorder strength.
