Instituto de Ciencia de Materiales de Madrid
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Underdamped quantum ratchets

Sergey Denisov, Sigmund Kohler, and Peter Hänggi
Europhys. Lett. 85, 40003 (2009)

We investigate the quantum ratchet effect under the influence of weak dissipation which we treat within a Floquet-Markov master equation approach. A ratchet current emerges when all relevant symmetries are violated. Using time-reversal symmetric driving we predict a purely dissipation-induced quantum ratchet current. This directed quantum transport results from bath-induced superpositions of non-transporting Floquet states.
arXiv:0807.0196 [cond-mat]

[ICMM-CSIC] [Condensed Matter Theory]
last modified: 23.11.2017 by Sigmund Kohler