Underdamped quantum ratchets
arXiv:0807.0196 · doi:10.1209/0295-5075/85/40003
Abstract
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.
EPL 85, 40003 (2009)
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