Vijay Kumar, K. ; Ramaswamy, Sriram ; Rao, Madan (2008) Active elastic dimers: Self-propulsion and current reversal on a featureless track Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 77 (2). 020102. ISSN 1539-3755
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Official URL: http://pre.aps.org/abstract/PRE/v77/i2/e020102
Related URL: http://dx.doi.org/10.1103/PhysRevE.77.020102
Abstract
We present a Brownian inchworm model of a self-propelled elastic dimer in the absence of an external potential. Nonequilibrium noise together with a stretch-dependent damping form the propulsion mechanism. Our model connects three key nonequilibrium features - position-velocity correlations, a nonzero mean internal force, and a drift velocity. Our analytical results, including striking current reversals, compare very well with numerical simulations. The model unifies the propulsion mechanisms of DNA helicases, polar rods on a vibrated surface, crawling keratocytes and Myosin VI. We suggest experimental realizations and tests of the model.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 39878 |
Deposited On: | 19 May 2011 05:10 |
Last Modified: | 17 May 2016 22:09 |
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