Noise-induced quantum transport

Details Noise-induced quantum transport Noise-induced quantum transport

2004-11-10

arxiv.org/abs/cond-mat/0411270v2

Phys. Rev. E 71, 041107 (2005)

Physics

Condensed Matter

Statistical Mechanics

23 pages and 5 figures. To be published in Physical Review E

Scientific paper

10.1103/PhysRevE.71.041107

We analyze the problem of directed quantum transport induced by external exponentially correlated telegraphic noise. In addition to quantum nature of the heat bath, nonlinearity of the periodic system potential brings in quantum contribution. We observe that quantization, in general, enhances classical current at low temperature, while the differences become insignificant at higher temperature. Interplay of quantum diffusion and quantum correction to system potential is analyzed for various ranges of temperature, correlation time and strength of external noise and asymmetry parameters. A possible experimental realization of the observed quantum effects in a superionic conductor placed in a random asymmetric dichotomous electric field has been suggested.

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