Europhys. Lett.
Volume 72, Number 2, October 2005
Page(s) 183 - 189
Section General
Published online 21 September 2005
Europhys. Lett., 72 (2), pp. 183-189 (2005)
DOI: 10.1209/epl/i2005-10235-7

Energy flow for soliton ratchets

S. Denisov, S. Flach and A. Gorbach

Max-Planck-Institut für Physik komplexer Systeme Nöthnitzer Str. 38, 01187 Dresden, Germany

received 17 May 2005; accepted in final form 30 August 2005
published online 21 September 2005

We study the mechanism of directed energy transport for soliton ratchets. The energy flow appears due to the progressive motion of a soliton (kink) which is an energy carrier. However, the energy current formed by internal system deformations (the total field momentum) is zero. We show that the energy flow is realized via an inhomogeneous energy exchange between the system and the external ac driving. We also discuss effects of spatial discretization and combination of ac and dc external drivings.

05.45.Yv - Solitons.
05.60.-k - Transport processes.

© EDP Sciences 2005