Underdamped quantum ratchets

Underdamped quantum ratchets,10.1209/0295-5075/85/40003,Europhysics Letters (epl),Sergey Denisov,Sigmund Kohler,P. Hänggi

Underdamped quantum ratchets   (Citations: 1)
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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.
Journal: Europhysics Letters (epl) , vol. 85, no. 4, 2009
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