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Title: | Diffusion in tilted periodic potentials: Enhancement, universality, and scaling | Authors: | REIMANN, Peter VAN DEN BROECK, Christian Linke, H Hanggi, P Rubi, JM Perez-Madrid, A |
Issue Date: | 2002 | Publisher: | AMERICAN PHYSICAL SOC | Source: | PHYSICAL REVIEW E, 65(3) | 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. | Notes: | Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany. Limburgs Univ Ctr, B-3590 Diepenbeek, Belgium. Univ Oregon, Dept Phys, Eugene, OR 97403 USA. Univ Barcelona, Fac Fis, Dept Fis Fonamental, E-08028 Barcelona, Spain.Reimann, P, Univ Augsburg, Inst Phys, Univ Str 1, D-86135 Augsburg, Germany. | Document URI: | http://hdl.handle.net/1942/2481 | ISSN: | 1063-651X | DOI: | 10.1103/PhysRevE.65.031104 | ISI #: | 000174548800014 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2003 |
Appears in Collections: | Research publications |
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