Vortices play a leading role in many fascinating quantum phenomena. Here we generate a large number of vortices by thermally quenching a fermionic superfluid of ${}^6\mathrm{Li}$ atoms in an oblate optical trap and study their annihilation dynamics and spatial distribution. Over a wide interaction range from the attractive to the repulsive side across the Feshbach resonance, these quasi-two-dimensional vortices are observed to follow algebraic scaling laws both in time and space, having exponents consistent with the two-dimensional universality. We further simulate the classical $XY$ model on the square lattice by a Glauber dynamics and find good agreement between the numerical and experimental behaviors. Our work provides a direct demonstration of the universal 2D vortex dynamics.

中文翻译：

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强相互作用的费米离子超流体中准二维涡旋的通用动力学尺度

涡旋在许多引人入胜的量子现象中起着主导作用。在这里，我们通过热淬灭铁氧体的超离子流来产生大量的旋涡。${}^6里$原子在扁形光阱中并研究其an灭动力学和空间分布。在整个Feshbach共振中，从吸引侧到排斥侧，相互作用的范围很广，这些准二维涡流在时间和空间上均遵循代数缩放定律，并且具有与二维通用性一致的指数。我们进一步模拟经典$Xÿ$通过格劳伯动力学在方格上建立模型，并在数值和实验行为之间找到了良好的一致性。我们的工作直接演示了通用2D涡旋动力学。