论文标题
动荡的级联诱发冷原子超流体的持续电流
Turbulent cascade induced persistent current of cold atomic superfluids
论文作者
论文摘要
在环形二维Bose-Einstein冷凝物中散发零量子涡流的消散会形成原子的宏观持续流动。我们提出了一个协议，以基于双同心环形配置创建具有高绕组数量的持久流量。我们发现，当冷凝水的初始状态具有相同电荷的随机分布涡旋时，陷阱从单个环形到双同心环形形状的突然几何淬灭将增强陷阱外环形区域的循环流。我们创建的循环流具有很高的稳定性和良好的均匀性，没有拓扑激发。我们的研究对于新的原子设计很有希望，也有助于定量理解量子隧穿和相互作用的量子系统，远离平衡驱动。
Dissipating of disorder quantum vortices in an annular two-dimensional Bose-Einstein condensate can form a macroscopic persistent flow of atoms. We propose a protocol to create persistent flow with high winding number based on a double concentric ring-shaped configuration. We find that a sudden geometric quench of the trap from single ring-shape into double concentric ring-shape will enhance the circulation flow in the outer ring-shaped region of the trap when the initial state of the condensate is with randomly distributed vortices of the same charge. The circulation flows that we created are with high stability and good uniformity free from topological excitations. Our study is promising for new atomtronic designing, and is also helpful for quantitatively understanding quantum tunneling and interacting quantum systems driven far from equilibrium.
