Title
Diffusion in tilted periodic potentials: enhancement, universality, and scaling Diffusion in tilted periodic potentials: enhancement, universality, and scaling
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Melville, N.Y. :American Physical Society ,
Source (journal)
Physical review : E : statistical, nonlinear, and soft matter physics / American Physical Society. - Melville, N.Y., 2001 - 2015
Volume/pages
65(2002) , p. 031104,1-16
ISSN
1539-3755
1550-2376
ISI
000174548800014
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/a39d2f/8084.pdf
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