Quantum ratchet transport with minimal dispersion rate

Zhan, Fei, Denisov, S., Ponomarev, A. V. and Haenggi, P. (2011) Quantum ratchet transport with minimal dispersion rate. Physical Review A, 84 4: . doi:10.1103/PhysRevA.84.043617

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Author Zhan, Fei
Denisov, S.
Ponomarev, A. V.
Haenggi, P.
Title Quantum ratchet transport with minimal dispersion rate
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2011-10
Sub-type Article (original research)
DOI 10.1103/PhysRevA.84.043617
Open Access Status File (Publisher version)
Volume 84
Issue 4
Total pages 6
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
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 Péclet 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.
Keyword Brownian Motors
Anderson Localization
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article number 043617.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
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