Dimer diffusion in a washboard potential

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Heinsalu, E.
Patriarca, M.
Marchesoni, F.
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Abstract
Description
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.
Comment: Final revised version. 7 pages, 6 figures
Keywords
Condensed Matter - Statistical Mechanics
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