Communication: Probing anomalous diffusion in frequency space
Abstract
Anomalous diffusion processes are usually detected by analyzing the time-dependent mean square displacement of the diffusing particles. The latter evolves asymptotically as W(t) ∼ 2Dαt(α), where Dα is the fractional diffusion constant and 0 < α < 2. In this article we show that both Dα and α can also be extracted from the low-frequency Fourier spectrum of the corresponding velocity autocorrelation function. This offers a simple method for the...
Paper Details
Title
Communication: Probing anomalous diffusion in frequency space
Published Date
Nov 20, 2015
Volume
143
Issue
19
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