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nlin.SI2004
Analytical approach to soliton ratchets in asymmetric potentials
Niurka R. Quintero, Bernardo Sánchez-Rey, Mario Salerno
We use soliton perturbation theory and collective coordinate ansatz to investigate the mechanism of soliton ratchets in a driven and damped asymmetric double sine-Gordon equation.…
cond-mat.stat-mech2004
Ratchets in homogeneous extended systems: internal modes and the role of noise
Angel Sanchez, Luis Morales-Molina, Franz G. Mertens +3
We revisit the issue of directed motion induced by zero average forces in extended systems driven by ac forces. It has been shown recently that a directed energy current appears if…