Directed transport of Brownian particles in a double symmetric potential

Details Directed transport of Brownian particles in a double symmetric potential Directed transport of Brownian particles in a double symmetric potential

2004-04-30

arxiv.org/abs/cond-mat/0404731v1

Physical Review E 70 (2004) 011102

Physics

Condensed Matter

Other Condensed Matter

to appear in Physical Review E

Scientific paper

10.1103/PhysRevE.70.011102

We investigate the dynamics of Brownian particles in internal state- dependent symmetric and periodic potentials. Although no space or time symmetry of the Hamiltonian is broken, we show that directed transport can appear. We demonstrate that the directed motion is induced by breaking the symmetry of the transition rates between the potentials when these are spatially shifted. Finally, we discuss the possibility of realizing our model in a system of cold particles trapped in optical lattices.

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