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Face of Tobias Ambjörnsson. Photo.

Tobias Ambjörnsson

Senior lecturer

Face of Tobias Ambjörnsson. Photo.

Tracer particles in two-dimensional elastic networks diffuse logarithmically slow

Author

  • Ludvig Lizana
  • Tobias Ambjörnsson
  • Michael A. Lomholt

Summary, in English

Several experiments on tagged molecules or particles in living systems suggest that they move anomalously slow - their mean squared displacement (MSD) increase slower than linearly with time. Leading models aimed at understanding these experiments predict that the MSD grows as a power law with a growth exponent that is smaller than unity. However, in some experiments the growth is so slow (fitted exponent ∼0.1-0.2) that they hint towards other mechanisms at play. In this paper, we theoretically demonstrate how in-plane collective modes excited by thermal fluctuations in a two dimensional membrane lead to logarithmic time dependence for the the tracer particle's MSD.

Department/s

  • Computational Biology and Biological Physics

Publishing year

2017-01-20

Language

English

Publication/Series

Journal of Physics A: Mathematical and Theoretical

Volume

50

Issue

3

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Physical Sciences

Keywords

  • diffusion
  • logarithmic dynamics
  • membrane
  • single-particle tracking

Status

Published

ISBN/ISSN/Other

  • ISSN: 1751-8113