Non-Gaussian Fluctuations Resulting from Power-Law Trapping in a Lipid Bilayer
Non-Gaussian Fluctuations Resulting from Power-Law Trapping in a Lipid Bilayer
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DOI：
10.1103/physrevlett.107.178103
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发表时间：
2011-10-20
影响因子：
8.6
通讯作者：
Yasui, Masato
中科院分区：
文献类型：
--
作者：
Akimoto, Takuma;Yamamoto, Eiji;Yasui, Masato
脂双层中的反常扩散通常归因于粘弹性行为。利用分子动力学模拟计算了脂双层中时均方位移相对涨落的标度指数。根据连续时间随机游走理论，该指数指示由幂律捕获时间引起的非高斯行为。我们的研究结果提供了第一个证据，脂质双层不仅具有粘弹性，但也捕获时间分布根据幂律。
Anomalous diffusion in lipid bilayers is usually attributed to viscoelastic behavior. We compute the scaling exponent of relative fluctuations of the time-averaged mean square displacement in a lipid bilayer, by using a molecular dynamics simulation. According to the continuous time random walk theory, this exponent indicates non-Gaussian behavior caused by a power-law trapping time. Our results provide the first evidence that a lipid bilayer has not only viscoelastic properties but also trapping times distributed according to a power law.