Title:
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Difussion in a titled periodic potential: Enhancement, universality, and scaling
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Author:
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Reimann, P.; Van den Broek, C.; Linke, H.; Hänggi, Peter; Rubí Capaceti, José Miguel; Pérez Madrid, Agustín
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Other authors:
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Universitat de Barcelona |
Abstract:
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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. |
Subject(s):
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-Física estadística -Sistemes no lineals -Física matemàtica -Statistical physics -Nonlinear systems -Mathematical physics |
Rights:
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(c) American Physical Society, 2002
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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