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arXiv · 0708.2858

Dimer diffusion in a washboard potential

E. Heinsalu·M. Patriarca·F. Marchesoni
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Abstract

The transport of a dimer, consisting of two Brownian particles bounded by a harmonic potential, moving on a periodic substrate is investigated both numerically and analytically. The mobility and diffusion of the dimer center of mass present distinct properties when compared with those of a monomer under the same transport conditions. Both the average current and the diffusion coefficient are found to be complicated non-monotonic functions of the driving force. The influence of dimer equilibrium length, coupling strength and damping constant on the dimer transport properties are also examined in detail.

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E. Heinsalu, M. Patriarca, F. Marchesoni. 2008-08-03. Dimer diffusion in a washboard potential. https://doi.org/10.1103/physreve.77.021129

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