Article (Scientific journals)
Driven probe under harmonic confinement in a colloidal bath
Demery, Vincent; Fodor, Etienne
2019In Journal of Statistical Mechanics: Theory and Experiment
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Keywords :
driven diffusive systems; stochastic particle dynamics; Brownian motion coarse-graining SINGLE-PARTICLE MOTION; MICRORHEOLOGY; DYNAMICS; PHYSICS Mechanics; Physics Mechanics; Physics; Mathematical vincent.demery@espci.psl.eu e.fodor@damtp.cam.ac.uk Fodor; Etienne/0000-0003-1372-2195 University of CambridgeUniversity of Cambridge; St Catherine's College The authors acknowledge insightful discussions with Michael E Cates. EF benefits from an Oppenheimer Research Fellowship from the University of Cambridge; and a Junior Research Fellowship from St Catherine's College. 54 2 0 2 J. Stat. Mech.-Theory Exp. HO2WS WOS:000460778300001
Abstract :
[en] Colloids held by optical or magnetic tweezers have been used to explore the local rheological properties of a complex medium and to extract work from fluctuations with some appropriate protocols. However, a general theoretical understanding of the interplay between the confinement and the interaction with the environment is still lacking. Here, we explore the statistical properties of the position of a probe confined in a harmonic trap moving at constant velocity and interacting with a bath of colloidal particles maintained at a different temperature. Interactions among particles are accounted for by a systematic perturbation, whose range of validity is tested against direct simulations of the full dynamics. Overall, our results provide a way to predict the effect of the driving and the environment on the probe, and can potentially be used to investigate the properties of colloidal heat engines with many-body interactions.
Disciplines :
Physics
Author, co-author :
Demery, Vincent;  Gulliver, CNRS, ESPCI Paris, PSL Research University, 10 Rue Vauquelin, 75005 Paris, France ; Laboratoire de Physique, ENS de Lyon, Université Lyon, Université Claude Bernard Lyon 1, CNRS, F-69342 Lyon, France
Fodor, Etienne ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
External co-authors :
yes
Language :
English
Title :
Driven probe under harmonic confinement in a colloidal bath
Publication date :
2019
Journal title :
Journal of Statistical Mechanics: Theory and Experiment
ISSN :
1742-5468
Publisher :
IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND, Unknown/unspecified
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Commentary :
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