论文标题
无限管中偶极杆气的超验证和结晶
Supersolidity and crystallization of a dipolar Bose gas in an infinite tube
论文作者
论文摘要
我们计算限制在无限管电位中的偶极杆气的基态。我们使用扩展的Gross-Pitaevskii方程理论，并提出了一种新型的数值方法来有效地获得溶液。该方法的一个关键特征是截断的偶极 - 偶极相互作用电位的分析结果，该偶极 - 偶极相互作用势能使长期相互作用能够在单位单元格中进行准确评估。我们的重点是将基态相互作用驱动的晶体过渡，因为短距离相互作用强度变化。我们发现过渡是连续或不连续的，具体取决于平均系统密度。这些结果使人们更深入地了解最近实验中观察到的超诺相变，并验证了[Phys中所开发的降低的三维理论的效用。 Rev. Res。 2，043318（2020）]用于进行定性准确的预测。
We calculate the ground states of a dipolar Bose gas confined in an infinite tube potential. We use the extended Gross-Pitaevskii equation theory and present a novel numerical method to efficiently obtain solutions. A key feature of this method is an analytic result for a truncated dipole-dipole interaction potential that enables the long-ranged interactions to be accurately evaluated within a unit cell. Our focus is on the transition of the ground state to a crystal driven by dipole-dipole interactions as the short ranged interaction strength is varied. We find that the transition is continuous or discontinuous depending upon average system density. These results give deeper insight into the supersolid phase transition observed in recent experiments, and validate the utility of the reduced three-dimensional theory developed in [Phys. Rev. Res. 2, 043318 (2020)] for making qualitatively accurate predictions.
