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Title: Difussion in a titled periodic potential: Enhancement, universality, and scaling
Author: Reimann, Peter
Van den Broek, C.
Linke, H.
Hänggi, Peter
Rubí Capaceti, José Miguel
Pérez Madrid, Agustín
Keywords: Física estadística
Sistemes no lineals
Física matemàtica
Statistical physics
Nonlinear systems
Mathematical physics
Issue Date: 2002
Publisher: The American Physical Society
Abstract: An exact analytical expression for the effective diffusion coefficient of an overdamped Brownian particle in a tilted periodic potential is derived for arbitrary potentials and arbitrary strengths of the thermal noise. Near the critical tilt (threshold of deterministic running solutions) a scaling behavior for weak thermal noise is revealed and various universality classes are identified. In comparison with the bare (potential-free) thermal diffusion, the effective diffusion coefficient in a critically tilted periodic potential may be, in principle, arbitrarily enhanced. For a realistic experimental setup, an enhancement by 14 orders of magnitude is predicted so that thermal diffusion should be observable on a macroscopic scale at room temperature.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 2002, vol. 65, núm. 3, p. 031104-1-031104-16
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ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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