Enhancement of mobility by periodically modulating the slanting slope of a washboard potential

Details Enhancement of mobility by periodically modulating the slanting slope of a washboard potential Enhancement of mobility by periodically modulating the slanting slope of a washboard potential

Publishing date

2001-01-29

URL

arxiv.org/abs/cond-mat/0101425v1

Science

Physics

Field

Condensed Matter

SubField

Statistical Mechanics

Additional info

4 RevTeX pages, 4 eps figures included

Type

Scientific paper

Abstract

Average mobility of very feebly damped particles in tilted periodic potentials is considered. Under the combined action of thermal fluctuations and small temporal modulation of the tilt of the potential the particles, in the small tilt range, become more mobile than without modulation. The enhancement of mobility depends (nonmonotonically) on the frequency of modulation. For small modulations the enhancement shows a peak as a function of frequency. This has an obvious implication on the measured voltage across a Josephson junction driven by a small amplitude alternating current of suitable frequency.

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