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Author Morales-Molina, L. ♦ Flach, S. ♦ Gong, J. B.
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-05-06
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Condensed Matter - Other Condensed Matter ♦ physics:cond-mat
Abstract We control the current of a single particle quantum ratchet by designing ramping schemes for experimentally accessible control parameters. We harvest on Landau-Zener transitions between Floquet states. Adiabatic and diabatic ramping allow to control the resulting directed transport. We find strong changes of the current in the adiabatic regime. Simple loops in control parameter space with alternating adiabatic and diabatic ramping are proposed. We obtain also current reversal. Full desymmetrization of the quantum ratchet increases the critical ramping speed which separates the adiabatic from the diabatic regime.
Description Comment: Submitted to Europhysics Letters on 10th April, Accepted for publication
Reference: Europhysics Letters 83, 40005 (2008).
Educational Use Research
Learning Resource Type Article


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