论文标题
力分布中的非高斯尾巴:弹性物体宿主介质中相关疾病的标志
Non-Gaussian tail in the force distribution: A hallmark of correlated disorder in the host media of elastic objects
论文作者
论文摘要
推断出弹性物体被核定的媒体中的疾病性质对于许多应用至关重要,但仍然是一个具有挑战性的基本科学问题。在这里,我们提出了一种方法来辨别弱点或强相关障碍是基于表征映射在大型视野中的物体之间的相互作用力的分布而主导的。我们用在II类型超导体中成核的涡旋结构的案例研究系统来说明我们的建议。相互作用力分布是从千数宽度范围涡流密度范围内在千涡流视野中成像的单个涡旋位置计算得出的。涡旋结构在点序介质中成核存在相互作用力分量的高斯分布。相比之下,如果培养基具有稀释和随机分布的相关障碍,这些分布呈现出非高斯代数降级的尾巴,用于较大的力量。我们建议检测与高斯行为的偏差是强障碍的指纹,在我们的情况下,源自相关固定中心的稀释分布。
Inferring the nature of disorder in the media where elastic objects are nucleated is of crucial importance for many applications but remains a challenging basic-science problem. Here we propose a method to discern whether weak-point or strong-correlated disorder dominates based on characterizing the distribution of the interaction forces between objects mapped in large fields-of-view. We illustrate our proposal with the case-study system of vortex structures nucleated in type-II superconductors with different pinning landscapes. Interaction force distributions are computed from individual vortex positions imaged in thousands-vortices fields-of-view in a two-orders-of-magnitude-wide vortex-density range. Vortex structures nucleated in point-disordered media present Gaussian distributions of the interaction force components. In contrast, if the media have dilute and randomly-distributed correlated disorder, these distributions present non-Gaussian algebraically-decaying tails for large force magnitudes. We propose that detecting this deviation from the Gaussian behavior is a fingerprint of strong disorder, in our case originated from a dilute distribution of correlated pinning centers.