Volume 131, Number 1, July 2020
|Number of page(s)||7|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||29 July 2020|
Non-Gaussian information of heterogeneity in soft matter
1 The Institute of Mathematical Sciences - IV Cross Street, CIT Campus, Taramani, Chennai, Tamilnadu 600113, India
2 Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Punjab 140306, India
Received: 20 March 2020
Accepted: 29 June 2020
Heterogeneity in dynamics in the form of non-Gaussian molecular displacement distributions appears ubiquitously in soft matter. We address the quantification of such heterogeneity using an information-theoretic measure of the distance between the actual displacement distribution and its nearest Gaussian estimation. We explore the usefulness of this measure in two generic scenarios of random walkers in heterogeneous media. We show that our proposed measure leads to a better quantification of non-Gaussianity than the conventional ones based on moment ratios.
PACS: 82.70.Dd – Colloids / 64.70.pv – Colloids
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