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http://hdl.handle.net/2445/18866
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: http://dx.doi.org/10.1103/PhysRevE.65.031104 |
It is part of: | Physical Review E, 2002, vol. 65, núm. 3, p. 031104-1-031104-16 |
URI: | http://hdl.handle.net/2445/18866 |
Related resource: | http://dx.doi.org/10.1103/PhysRevE.65.031104 |
ISSN: | 1063-651X |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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