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arXiv 1504.06404cond-mat.quant-gas
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淬灭铁磁自旋1凝聚体的普适粗化动力学

Universal coarsening dynamics of a quenched ferromagnetic spin-1 condensate

Lewis A. Williamson, P. B. Blakie

摘要:

我们证明了一个准二维自旋1冷凝淬火到铁磁相经历普遍粗化在其后期的时间动力学。失超可以通过施加的磁场的突然变化来实现,并且根据最终值,铁磁相具有易轴(Ising)或易平面(XY)对称性,具有不同的动态临界指数。我们的结果揭示了易平面相的分形畴结构和极核自旋涡旋在粗化动力学中的关键作用。

英文摘要:

We demonstrate that a quasi-two-dimensional spin-1 condensate quenched to a ferromagnetic phase undergoes universal coarsening in its late time dynamics. The quench can be implemented by a sudden change in the applied magnetic field and, depending on the final value, the ferromagnetic phase has easy-axis (Ising) or easy-plane (XY) symmetry, with different dynamical critical exponents. Our results for the easy-plane phase reveal a fractal domain structure and the crucial role of polar-core spin vortices in the coarsening dynamics.

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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