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arXiv 0802.3516cond-mat.dis-nn
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原子玻璃形成系统的动力学可以用连续时间随机游走来描述吗?

Can the dynamics of an atomic glass-forming system be described as a continuous time random walk?

Oliver Rubner, Andreas Heuer

摘要:

我们表明,过冷液体的动力学,分析从计算机模拟的二元混合物Lennard-Jones系统,可以描述在一个连续的时间随机游走(CTRW)。所需的离散化来自映射元库之间转换的动态。这种比较涉及到验证CTRW的条件以及预测的定量测试。特别是,它是可能的,以表示波矢量依赖的弛豫时间,以及在等待时间分布的前三个时刻的非指数性的程度。

英文摘要:

We show that the dynamics of supercooled liquids, analyzed from computer simulations of the binary mixture Lennard-Jones system, can be described in terms of a continuous time random walk (CTRW). The required discretization comes from mapping the dynamics on transitions between metabasins. This comparison involves verifying the conditions of the CTRW as well as a quantitative test of the predictions. In particular it is possible to express the wave vector-dependence of the relaxation time as well as the degree of non-exponentiality in terms of the first three moments of the waiting time distribution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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