Energy Flow Puzzle of Soliton Ratchets
arXiv:cond-mat/0501497 · doi:10.1209/epl/i2005-10235-7
Abstract
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 solve the underlying puzzle by showing that the energy flow is realized via an {\it inhomogeneous} energy exchange between the system and the external ac driving. Internal kink modes are unambiguously shown to be crucial for that transport process to take place. We also discuss effects of spatial discretization and combination of ac and dc external drivings.
4 pages, 3 figures, submitted to PRL
References in corpus (7)
- Ratchet-like dynamics of fluxons in annular Josephson junctions driven by bi-harmonic microwave fields
- Soliton ratchets induced by ac forces with harmonic mixing
- Broken symmetries and directed collective energy transport
- Soliton ratchets
- Internal mode mechanism for collective energy transport in extended systems
- Soliton Ratchets Induced by Excitation of Internal Modes
- Progressive motion of an ac-driven kink in an annular damped system