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Micro-excitations in Coulomb liquids

机译：库仑液体中的微激发

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摘要

In a two-dimensional liquid melted from a triangular lattice, the accumulation of constructive perturbation from thermal noise and other external slow drive can cause stick-slip type particle hopping over the caging barrier formed by the surrounding particles, which in turn distort the order lattice structure and generate topological defects. Through the strong mutual coupling, these nonlinear threshold-type micro-excitations of fast particles and topological defects usually occur in the form of avalanche type clusters involving a small number of sites. The dusty plasma liquid formed by suspending negatively charged micrometre sized particles in a low pressure discharge background turns out to be a good candidate to study the above spatio-temporal dynamical behaviours at the kinetic level through direct optical video microscopy. In this paper, we review our recent studies on this issue and compare the generic behaviours with other nonlinear coupled complex system excited by noise and other slow drives.
机译：在由三角形晶格融化的二维液体中，热噪声和其他外部慢速驱动引起的相长摄动累积会导致粘滑型颗粒跳越周围颗粒形成的笼式屏障，从而使有序晶格变形结构并产生拓扑缺陷。通过强相互耦合，快速粒子和拓扑缺陷的这些非线性阈值型微激励通常以雪崩型簇的形式出现，涉及少量位点。通过将带负电的微米级颗粒悬浮在低压放电背景中而形成的尘土等离子体液体被证明是通过直接光学视频显微镜在动力学水平上研究上述时空动力学行为的良好候选者。在本文中，我们回顾了有关该问题的最新研究，并将其一般行为与受噪声和其他慢速驱动激励的其他非线性耦合复杂系统进行了比较。

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