Stochastic ratcheting of two-dimensional colloids: Directed current and dynamical transitions

Chakraborty, D and Chaudhuri, Debasish (2015) Stochastic ratcheting of two-dimensional colloids: Directed current and dynamical transitions. Physical Review E, 91 (5). ISSN 1539-3755

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Abstract

We present results of molecular dynamics simulations for two-dimensional repulsively interacting colloids driven by a one-dimensional asymmetric and commensurate ratchet potential, switching on and off stochastically. This drives a time-averaged directed current of colloids, exhibiting resonance with change in ratcheting frequency, where the resonance frequency itself depends nonmonotonically on density. Using scaling arguments, we obtain analytic results that show good agreement with numerical simulations. With increasing ratcheting frequency, we find nonequilibrium reentrant transitions between solid and modulated liquid phases.

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IITH Creators:	IITH Creators ORCiD Chaudhuri, Debasish UNSPECIFIED
Item Type:	Article
Uncontrolled Keywords:	colloids, ratcheting frequency,
Subjects:	Physics
Divisions:	Department of Physics
Depositing User:	Library Staff
Date Deposited:	21 May 2015 07:09
Last Modified:	30 Aug 2017 10:58
URI:	http://raiithold.iith.ac.in/id/eprint/1519
Publisher URL:	https://doi.org/10.1103/PhysRevE.91.050301
OA policy:	http://www.sherpa.ac.uk/romeo/issn/1539-3755/
Related URLs:	Google Scholar

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