Ruostekoski J, Anglin J R
Department of Physical Sciences, University of Hertfordshire, Hatfield, Hertfordshire AL10 9AB, United Kingdom.
Phys Rev Lett. 2003 Nov 7;91(19):190402. doi: 10.1103/PhysRevLett.91.190402. Epub 2003 Nov 3.
We show how the length scale hierarchy, resulting from different interaction strengths in an optically trapped spin-1 23Na Bose-Einstein condensate, can lead to intriguing core deformations in singular topological defects. In particular, a point defect can be unstable with respect to the formation of a stable half-quantum vortex ring (an "Alice ring"), providing a realistic scheme to use dissipation as a sophisticated state engineering tool. We compute the threshold for stability of the point monopole, which is beyond the current experimental regime.
我们展示了在光学捕获的自旋-1 23Na玻色-爱因斯坦凝聚体中，由不同相互作用强度产生的长度尺度层次结构如何导致奇异拓扑缺陷中有趣的核心变形。特别是，一个点缺陷相对于稳定的半量子涡旋环（“爱丽丝环”）的形成可能是不稳定的，这提供了一个将耗散用作精密状态工程工具的现实方案。我们计算了点单极子的稳定性阈值，这超出了当前的实验范围。
