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Quantum Ratchets with Few Bands below the Barrier

DOI to cite this document:
Grifoni, Milena ; Ferreira, M. S. ; Peguiron, J. ; Majer, J. B.

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Date of publication of this fulltext: 18 Sep 2009 09:19


We investigate directed motion in nonadiabatically rocked ratchet systems sustaining few bands below the barrier. Upon restricting the dynamics to the lowest M bands, the total system-plus-bath Hamiltonian is mapped onto a discrete tight-binding model containing all the information both on the intrawell and interwell tunneling motion. A closed form for the current in the incoherent ...


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