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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
ISSN: E-ISSN: 1550-2376
P-ISSN: 1539-3755
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Copyright: 2008 The American Physical Society
Appears in Collections:Research Papers (TP)

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