Dimer diffusion in a washboard potential

Details Dimer diffusion in a washboard potential Dimer diffusion in a washboard potential

2007-08-21

arxiv.org/abs/0708.2858v2

Phys. Rev. E 77, 021129 (2008)

Physics

Condensed Matter

Statistical Mechanics

Final revised version. 7 pages, 6 figures

Scientific paper

10.1103/PhysRevE.77.021129

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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