Lorentz 模型中动态关联衰减的截然
软凝聚态物质
2007-05-23 v2
摘要
我们通过分子动力学模拟研究了在二维和三维中空间各向异性介质中传输系数的长时间行为。将速度自相关函数的行为在临界松弛由于潜在的 percolation 转变和水动力学幂律异常之间进行合理化。在二维情况下且在无扩散模式下，另一种幂律异常由于捕获发现，指数为-3而非-2。进一步地，Burnett 系数的对数发散在稀疏极限中得到了证实；但在有限密度下，它被更强的发散所主导。
引用
@article{arxiv.cond-mat/0701659,
title = {Crossover in the Slow Decay of Dynamic Correlations in the Lorentz Model},
author = {Felix Höfling and Thomas Franosch},
journal= {arXiv preprint arXiv:cond-mat/0701659},
year = {2007}
}
备注
Full-length paragraph added that exemplifies the relevance for dense fluids and makes a connection to recently observed, novel long-time tails in a hard-sphere fluid