论文标题
椭圆形波导中的Bose-Einstein冷凝物
Bose-Einstein condensate in an elliptical waveguide
论文作者
论文摘要
我们研究了空间曲率对限制在椭圆形波导中的原子玻璃凝结物的影响。该系统通过具有量子曲线电势的有效的1D Gross-Pitaevskii方程来很好地描述，该方程的形状具有双孔的形状，但至关重要地取决于椭圆的偏心率。系统的基态显示了从两峰配置到以关键有吸引力的相互作用强度的一峰配置的量子相变。在此相变的对应关系中，超流体分数大大降低，并且对于足够有吸引力的玻璃乳液相互作用而言为零。
We investigate the effects of spatial curvature for an atomic Bose-Einstein condensate confined in an elliptical waveguide. The system is well described by an effective 1D Gross-Pitaevskii equation with a quantum-curvature potential, which has the shape of a double-well but crucially depends on the eccentricity of the ellipse. The ground state of the system displays a quantum phase transition from a two-peak configuration to a one-peak configuration at a critical attractive interaction strength. In correspondence of this phase transition the superfluid fraction strongly reduces and goes to zero for a sufficiently attractive Bose-Bose interaction.
