arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.01068cond-mat.quant-gasphysics.atom-ph
收藏

盒子中偶极量子气体的超固态边缘相和体相

Supersolid edge and bulk phases of a dipolar quantum gas in a box

S. M. Roccuzzo, S. Stringari, Alessio Recati

摘要:

我们研究了偶极玻色-爱因斯坦凝聚气体在箱势中获得的新的密度分布,特别关注超实性的影响。从谐波捕获的情况下,基态密度揭示了一个强大的耗尽体区域和附近的墙壁,以及从散装分离的原子的积累,作为一个结果的吸引力和排斥力的性质之间的竞争。在一个准二维几何特征的圆柱形盒捕获,我们观察到出现的环状配置附近的边界的盒子,揭示了特殊的超固体和晶体效应在一个有用的参数范围。在正方形盒捕获的情况下,沿边缘的密度振荡,所造成的增强积累的原子附近的顶点,表现出有趣的类比与盒捕获的一维配置的情况下。对于足够大的值的原子数也散装区域可以表现出超实性,所得到的几何形状反映了对称性的限制潜力,即使是大系统。

英文摘要:

We investigate the novel density distributions acquired by a dipolar Bose-Einstein condensed gas confined in a box potential, with special focus on the effects of supersolidity. Differently from the case of harmonic trapping, the ground state density reveals a strong depletion in the bulk region and an accumulation of atoms near the walls, well separated from the bulk, as a consequence of the competition between the attractive and the repulsive nature of the dipolar force. In a quasi two-dimensional geometry characterized by cylindrical box trapping, we observe the emergence of a ring-like configuration near the boundary of the box, reveling peculiar supersolid and crystal effects in a useful range of parameters. In the case of square box trapping the density oscillations along the edges, caused by the enhanced accumulation of atoms near the vertices, exhibit interesting analogies with the case of box trapped one dimensional configurations. For sufficiently large values of the atom number also the bulk region can exhibit supersolidity, the resulting geometry reflecting the symmetry of the confining potential even for large systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑