Quantum diffusion in biased washboard potentials: strong friction limit

  • Diffusive transport properties of a quantum Brownian particle moving in a tilted spatially periodic potential and strongly interacting with a thermostat are explored. Apart from the average stationary velocity, we foremost investigate the diffusive behavior by evaluating the effective diffusion coefficient together with the corresponding Peclet number. Corrections due to quantum effects, such as quantum tunneling and quantum fluctuations, are shown to substantially enhance the effectiveness of diffusive transport if only the thermostat temperature resides within an appropriate interval of intermediate values.

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Author:Lukasz MachuraORCiDGND, Marcin KosturGND, Peter TalknerGND, Jerzy Łuczka, Peter HänggiGND
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/328
Publishing Institution:Universität Augsburg
Release Date:2006/08/31
Tag:Brownian motion; effective diffusion; strong friction; quantum corrections; Peclet number
GND-Keyword:Brownsche Bewegung; Diffusion; Péclet-Zahl; Quanteneffekt
Source:erschienen in: Phys. Rev. E 73, 031105 (2006); DOI: 10.1103/PhysRevE.73.031105; URL: http://link.aps.org/abstract/PRE/v73/e031105
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik I
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik