Dissipation Enhanced Asymmetric Transport in Quantum Ratchets
Statistical Mechanics
2009-10-30 v1 Mesoscale and Nanoscale Physics
Abstract
Quantum mechanical motion of a particle in a periodic asymmetric potential is studied theoretically at zero temperature. It is shown based on semi-classical approximation that the tunneling probability from one local minimum to the next becomes asymmetric in the presence of weak oscillating field, even though there is no macroscopic field gradient in average. Dissipation enhances this asymmetry, and leads to a steady unidirectional current, resulting in a quantum ratchet system.
Keywords
Cite
@article{arxiv.cond-mat/9711045,
title = {Dissipation Enhanced Asymmetric Transport in Quantum Ratchets},
author = {Gen Tatara and Macoto Kikuchi and Satoshi Yukawa and Hiroshi Matsukawa},
journal= {arXiv preprint arXiv:cond-mat/9711045},
year = {2009}
}
Comments
12 pages, 2 Figures, submitted to J. Phys. Soc. Jpn