无序环境中涡旋线钉扎时间统计
Pinning time statistics for vortex lines in disordered environments
摘要：
研究了无序第二类超导体中磁通量（涡旋）线的钉扎动力学。利用有向弹性线模型的数值模拟，我们提取了涡旋线段的钉扎时间分布。我们比较不同的模型实现的障碍在周围介质中：离散的，本地化的钉扎势阱的吸引力和排斥力或纯粹的吸引力，其强度是从高斯分布;以及连续的高斯随机电位景观。我们发现，这两个计划产生的钉扎阶段的幂律分布预测的极端事件统计，但他们显着不同的有效标度指数和他们的短期行为。
英文摘要：
We study the pinning dynamics of magnetic flux (vortex) lines in a disordered type-II superconductor. Using numerical simulations of a directed elastic line model, we extract the pinning time distributions of vortex line segments. We compare different model implementations for the disorder in the surrounding medium: discrete, localized pinning potential wells that are either attractive and repulsive or purely attractive, and whose strengths are drawn from a Gaussian distribution; as well as continuous Gaussian random potential landscapes. We find that both schemes yield power law distributions in the pinned phase as predicted by extreme-event statistics, yet they differ significantly in their effective scaling exponents and their short-time behavior.
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