Tracer particles in two-dimensional elastic networks diffuse logarithmically slow

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

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.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Umeå University
  • University of Southern Denmark
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysik

Nyckelord

Originalspråkengelska
Artikelnummer034001
TidskriftJournal of Physics A: Mathematical and Theoretical
Volym50
Utgivningsnummer3
StatusPublished - 2017 jan 20
PublikationskategoriForskning
Peer review utfördJa