论文标题
费米子超流体中量子涡流的耗散动力学
Dissipative Dynamics of Quantum Vortices in Fermionic Superfluid
论文作者
论文摘要
在最近的文章中，Kwon等人。 [自然（伦敦）{\ bf 600}，64（2021）]在费米子超流体中揭示了量子涡流的非额外耗散动力学。对于Bardeen-Cooper-Schrieffer的相互作用，耗散过程的增强是明显的，并且建议其效果是由于涡旋核心内部存在的准粒子所致。我们通过具有时间依赖性密度功能理论的数值模拟来检验这一假设：一个具有费米子自由度的完全显微镜框架。完全显微镜计算的结果暴露了涡流结合状态对费米子超流体中耗散动力学的影响。它们的贡献太弱了，无法解释实验测量值，我们确定了热效应，从而导致超氟和正常成分之间的相互摩擦，主导了观察到的动力学。
In a recent article, Kwon et al. [Nature (London) {\bf 600}, 64 (2021)] revealed nonuniversal dissipative dynamics of quantum vortices in a fermionic superfluid. The enhancement of the dissipative process is pronounced for the Bardeen-Cooper-Schrieffer interaction regime, and it was suggested that the effect is due to the presence of quasiparticles localized inside the vortex core. We test this hypothesis through numerical simulations with time-dependent density-functional theory: a fully microscopic framework with fermionic degrees of freedom. The results of fully microscopic calculations expose the impact of the vortex-bound states on dissipative dynamics in a fermionic superfluid. Their contribution is too weak to explain the experimental measurements, and we identify that thermal effects, giving rise to mutual friction between superfluid and the normal component, dominate the observed dynamics.
