Vortex Reconnections and Rebounds in Trapped Atomic Bose-Einstein Condensates

被引:81
作者
Serafini, Simone [1 ,2 ]
Galantucci, Luca [3 ,4 ]
Iseni, Elena [1 ,2 ]
Bienaime, Tom [1 ,2 ]
Bisset, Russell N. [1 ,2 ]
Barenghi, Carlo F. [3 ,4 ]
Dalfovo, Franco [1 ,2 ]
Lamporesi, Giacomo [1 ,2 ]
Ferrari, Gabriele [1 ,2 ]
机构
[1] Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy
[2] Univ Trento, Dipartimento Fis, I-38123 Povo, Italy
[3] Newcastle Univ, JQC Durham Newcastle, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[4] Newcastle Univ, Sch Math & Stat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
基金
英国工程与自然科学研究理事会;
关键词
Atomic and Molecular Physics; VORTICES; DYNAMICS; TURBULENCE; CASCADE; LINES;
D O I
10.1103/PhysRevX.7.021031
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Reconnections and interactions of filamentary coherent structures play a fundamental role in the dynamics of fluids, redistributing energy and helicity among the length scales and inducing fine-scale turbulent mixing. Unlike ordinary fluids, where vorticity is a continuous field, in quantum fluids vorticity is concentrated into discrete (quantized) vortex lines turning vortex reconnections into isolated events, making it conceptually easier to study. Here, we report experimental and numerical observations of three-dimensional quantum vortex interactions in a cigar-shaped atomic Bose-Einstein condensate. In addition to standard reconnections, already numerically and experimentally observed in homogeneous systems away from boundaries, we show that double reconnections, rebounds, and ejections can also occur as a consequence of the nonhomogeneous, confined nature of the system.
引用
收藏
页数:12
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