论文标题
伸长偶极冷凝物中的超验证
Supersolidity in an elongated dipolar condensate
论文作者
论文摘要
我们提出了一个理论，即在雪茄形偶极量子胶气中出现超固定状态的理论。我们的方法基于降低的三维（3D）理论，其中凝结波函数分解为轴向场，并在变化上描述了横向部分。这提供了一个准确的完全3D描述，该描述特定于当前实验的制度并有效计算。我们应用该理论来了解无限管电位中气体的相图。我们发现，随着平均密度的变化，超固体转变具有连续和不连续的区域。我们开发了两个简化的分析模型，以表征相图并阐明量子液滴和旋转激发的作用。
We present a theory for the emergence of a supersolid state in a cigar-shaped dipolar quantum Bose gas. Our approach is based on a reduced three-dimensional (3D) theory, where the condensate wavefunction is decomposed into an axial field and a transverse part described variationally. This provides an accurate fully 3D description that is specific to the regime of current experiments and efficient to compute. We apply this theory to understand the phase diagram for a gas in an infinite tube potential. We find that the supersolid transition has continuous and discontinuous regions as the averaged density varies. We develop two simplified analytic models to characterize the phase diagram and elucidate the roles of quantum droplets and of the roton excitation.
