Non-Gaussian anomalous dynamics in systems of interacting run-and-tumble particles
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Non-Gaussian anomalous dynamics in systems of interacting run-and-tumble particles. / Put, Stefanie; Berx, Jonas; Vanderzande, Carlo.
I: Journal of Statistical Mechanics: Theory and Experiment, Bind 2019, Nr. 12, 123205, 23.12.2019.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Non-Gaussian anomalous dynamics in systems of interacting run-and-tumble particles
AU - Put, Stefanie
AU - Berx, Jonas
AU - Vanderzande, Carlo
N1 - Publisher Copyright: © 2019 IOP Publishing Ltd and SISSA Medialab srl.
PY - 2019/12/23
Y1 - 2019/12/23
N2 - The motion of a tagged degree of freedom can give important insight into the interactions present in a complex environment. We investigate the dynamics of a tagged particle in two non-equilibrium systems that consist of interacting run-and-tumble particles. The first one is an exactly solvable polymer model, the second is a two-dimensional lattice model, which is studied through simulations. We find that in both cases a tagged particle shows anomalous dynamics and non-Gaussian behaviour for times below the persistence time of the run-and-tumble motion. For later times, the dynamics of the tagged monomer becomes diffusive. In the lattice model, the anomalous behaviour persists and can, for intermediate densities, be well approximated by a Laplace distribution. We attribute this behaviour to the dynamically changing environment of the tagged particle, which we argue, is an essential ingredient to observe deviations from Gaussianity.
AB - The motion of a tagged degree of freedom can give important insight into the interactions present in a complex environment. We investigate the dynamics of a tagged particle in two non-equilibrium systems that consist of interacting run-and-tumble particles. The first one is an exactly solvable polymer model, the second is a two-dimensional lattice model, which is studied through simulations. We find that in both cases a tagged particle shows anomalous dynamics and non-Gaussian behaviour for times below the persistence time of the run-and-tumble motion. For later times, the dynamics of the tagged monomer becomes diffusive. In the lattice model, the anomalous behaviour persists and can, for intermediate densities, be well approximated by a Laplace distribution. We attribute this behaviour to the dynamically changing environment of the tagged particle, which we argue, is an essential ingredient to observe deviations from Gaussianity.
KW - active matter
KW - Brownian motion
UR - http://www.scopus.com/inward/record.url?scp=85079883856&partnerID=8YFLogxK
U2 - 10.1088/1742-5468/ab4e90
DO - 10.1088/1742-5468/ab4e90
M3 - Journal article
AN - SCOPUS:85079883856
VL - 2019
JO - Journal of Statistical Mechanics: Theory and Experiment
JF - Journal of Statistical Mechanics: Theory and Experiment
SN - 1742-5468
IS - 12
M1 - 123205
ER -
ID: 371847739