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- W2110941846 abstract "We analyze the performance of quantum ratchets by considering the dynamics of an initially localized wave packet loaded into a flashing periodic potential. The directed center-of-mass motion can be initiated by the uniform modulation of the potential height, provided that the modulation protocol breaks all relevant time- and spatial-reflection symmetries. A poor performance of quantum ratchet transport is characterized by a slow net motion and a fast diffusive spreading of the wave packet, while the desirable optimal performance is the contrary. By invoking a quantum analog of the classical P'eclet number, namely the quotient of the group velocity and the dispersion of the propagating wave packet, we calibrate the transport properties of flashing quantum ratchets and discuss the mechanisms that yield low-dispersive directed transport." @default.
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- W2110941846 date "2011-10-11" @default.
- W2110941846 modified "2023-10-18" @default.
- W2110941846 title "Quantum ratchet transport with minimal dispersion rate" @default.
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- W2110941846 doi "https://doi.org/10.1103/physreva.84.043617" @default.
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