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arXiv 2007.02274cond-mat.quant-gasnlin.CDphysics.flu-dyn
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湍流级联诱导冷原子超流体的持续电流

Turbulent cascade induced persistent current of cold atomic superfluids

Xiyu Chen, Tao Yang, Wen-Li Yang, Wu-Ming Liu

摘要:

二维环形玻色-爱因斯坦凝聚体中无序量子涡旋的耗散可以形成宏观的原子持续流动。我们提出了一个协议,以创建持久流与高缠绕数的基础上的双同心环形配置。我们发现,当凝析气的初始状态为随机分布的相同电荷的涡旋时,阱的突然几何猝灭将增强阱外环形区域的环流.所建立的环流具有高稳定性和良好的均匀性,不受拓扑激励的影响。我们的研究对于新的原子电子学设计具有重要意义,同时也有助于定量地理解量子隧穿和远离平衡态的相互作用量子系统。

英文摘要:

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.

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。

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