Asymmetric transportation induced by thermal noise at the nanoscale

Details Asymmetric transportation induced by thermal noise at the nanoscale Asymmetric transportation induced by thermal noise at the nanoscale

2011-11-14

arxiv.org/abs/1111.3131v2

Physics

Condensed Matter

Statistical Mechanics

13 pages, 4 figures

Scientific paper

Based on a simple model, we theoretically show that asymmetric transportation is possible in nanoscale systems experiencing thermal noise without the presence of external fluctuations. The key to this theoretical advance is that the correlation lengths of the thermal fluctuations become significantly long for nanoscale systems. This differs from macroscopic systems in which the thermal noises are usually treated as white noise. Our observation does not violate the second law of thermodynamics, since at nanoscale, extra energy is required to keep the asymmetric structure against thermal fluctuations.

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