Title:	Active elastic dimers: Self-propulsion and current reversal on a featureless track
Authors:	Vijay Kumar, K. Ramaswamy, Sriram Rao, Madan
Issue Date:	Feb-2008
Publisher:	American Physical Society
Citation:	Physical Review E, 2008, Vol.77, 020102(R)
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.
Description:	Open Access
URI:	http://hdl.handle.net/2289/3535
ISSN:	E-ISSN: 1550-2376 P-ISSN: 1539-3755
Alternative Location:	http://dx.doi.org/10.1103/PhysRevE.77.020102 http://in.arxiv.org/abs/0708.1802
Copyright:	2008 The American Physical Society
Appears in Collections:	Research Papers (TP)

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