Efficiency and current reversals in spatially inhomogeneous ratchets

Authors
Dan, D Jayannavar, AM Mahato, MC
Citation
D. Dan et al., Efficiency and current reversals in spatially inhomogeneous ratchets, INT J MOD B, 14(15), 2000, pp. 1585-1591
Citations number
18
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
ISSN journal
02179792 → ACNP
Volume
14
Issue
15
Year of publication
2000
Pages
1585 - 1591
Database
ISI
SICI code
0217-9792(20000620)14:15<1585:EACRIS>2.0.ZU;2-L
Abstract
Efficiency of generation of net unidirectional current in an adiabatically driven symmetric periodic potential system is studied. The efficiency shows a maximum, in the case of an inhomogeneous system with spatially varying p eriodic friction coefficient, as a function of temperature. The ratchet is not most efficient when it gives maximum current. The direction of current may also be reversed as a function of noise strength when, instead, an asym metric periodic potential is considered.