Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2006-01-11
Physics
Condensed Matter
Other Condensed Matter
24 pages, 5 figures, submitted to Chaos
Scientific paper
10.1063/1.2207307
We study the energy flow due to the motion of topological solitons in nonlinear extended systems in the presence of damping and driving. The total field momentum contribution to the energy flux, which reduces the soliton motion to that of a point particle, is insufficient. We identify an additional exchange energy flux channel mediated by the spatial and temporal inhomogeneity of the system state. In the well-known case of a DC external force the corresponding exchange current is shown to be small but non-zero. For the case of AC driving forces, which lead to a soliton ratchet, the exchange energy flux mediates the complete energy flow of the system. We also consider the case of combination of AC and DC external forces, as well as spatial discretization effects.
Denisov Sergey
Flach Sergej
Gorbach Andrey V.
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