Tracer particles in two-dimensional elastic networks diffuse logarithmically slow
(2017) In Journal of Physics A: Mathematical and Theoretical 50(3).- 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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/e26da33d-355a-4ad3-a924-26164c3f3507
- author
- Lizana, Ludvig ; Ambjörnsson, Tobias LU and Lomholt, Michael A.
- organization
- publishing date
- 2017-01-20
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- diffusion, logarithmic dynamics, membrane, single-particle tracking
- in
- Journal of Physics A: Mathematical and Theoretical
- volume
- 50
- issue
- 3
- article number
- 034001
- publisher
- IOP Publishing
- external identifiers
-
- wos:000390819900001
- scopus:85008192108
- ISSN
- 1751-8113
- DOI
- 10.1088/1751-8121/50/3/034001
- language
- English
- LU publication?
- yes
- id
- e26da33d-355a-4ad3-a924-26164c3f3507
- date added to LUP
- 2017-02-15 08:30:02
- date last changed
- 2021-01-12 01:22:03
@article{e26da33d-355a-4ad3-a924-26164c3f3507, abstract = {<p>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.</p>}, author = {Lizana, Ludvig and Ambjörnsson, Tobias and Lomholt, Michael A.}, issn = {1751-8113}, language = {eng}, month = {01}, number = {3}, publisher = {IOP Publishing}, series = {Journal of Physics A: Mathematical and Theoretical}, title = {Tracer particles in two-dimensional elastic networks diffuse logarithmically slow}, url = {http://dx.doi.org/10.1088/1751-8121/50/3/034001}, doi = {10.1088/1751-8121/50/3/034001}, volume = {50}, year = {2017}, }