Lahaye T, Metz J, Fröhlich B, Koch T, Meister M, Griesmaier A, Pfau T, Saito H, Kawaguchi Y, Ueda M
5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
Phys Rev Lett. 2008 Aug 22;101(8):080401. doi: 10.1103/PhysRevLett.101.080401. Epub 2008 Aug 18.
We investigate the collapse dynamics of a dipolar condensate of 52Cr atoms when the s-wave scattering length characterizing the contact interaction is reduced below a critical value. A complex dynamics, involving an anisotropic, d-wave symmetric explosion of the condensate, is observed. The atom number decreases abruptly during the collapse. We find good agreement between our experimental results and those of a numerical simulation of the three-dimensional Gross-Pitaevskii equation, including contact and dipolar interactions as well as three-body losses. The simulation indicates that the collapse induces the formation of two vortex rings with opposite circulations.
我们研究了52Cr原子偶极凝聚体在表征接触相互作用的s波散射长度降低到临界值以下时的坍缩动力学。观察到一种复杂的动力学过程，其中包括凝聚体的各向异性、d波对称爆炸。在坍缩过程中原子数急剧减少。我们发现实验结果与三维格罗斯-皮塔耶夫斯基方程的数值模拟结果吻合良好，该模拟包括接触相互作用、偶极相互作用以及三体损耗。模拟表明坍缩诱导形成了两个具有相反环流的涡旋环。
