磁场对二维Yukawa液体中粒子速度自相关和囚禁的影响
Effect of magnetic field on the velocity autocorrelation and the caging of particles in two-dimensional Yukawa liquids
摘要：
通过数值模拟，研究了外加磁场对二维强耦合汤川液体中粒子速度自相关函数和“囚禁”的影响。的速度自相关函数的频谱中的主峰的位置上的耦合强度的影响证实了发病的联合效应的磁场和强相关性在高耦合。我们的分子动力学模拟量化了粒子周围环境的去相关性-发现磁场显着增加了锁定时间，其值远远超出了等离子体振荡的时间尺度。观察到的笼化时间增加与磁场降低相似系统中扩散的结果一致。
英文摘要：
We investigate the effect of an external magnetic field on the velocity autocorrelation function and the "caging" of the particles in a two-dimensional strongly coupled Yukawa liquid, via numerical simulations. The influence of the coupling strength on the position of the dominant peak in the frequency spectrum of the velocity autocorrelation function confirms the onset of a joint effect of the magnetic field and strong correlations at high coupling. Our molecular dynamics simulations quantify the decorrelation of the particles' surroundings - the magnetic field is found to increase significantly the caging time, which reaches values well beyond the timescale of plasma oscillations. The observation of the increased caging time is in accordance with findings that the magnetic field decreases diffusion in similar systems.
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