RT Journal Article
T1 Internal mode dynamics in driven nonolienar klein-Gordon systems
A1 Quintero, Niurka R.
A1 Sánchez, Angel
A1 Mertens, Franz G.
AB We study analytically and numerically the action of a constant force on the propagation ofkinks in the Ø4 and sine-Gordon systems, with and without dissipation. We speci cally investigate therelation of the external force with the oscillations of the kink width due to excitation of its internal modeor quasimode. We demonstrate that both dc force and dissipation, either jointly or separately, damp theoscillations of the kink width. We further prove that, in contrast to earlier predictions, those oscillationscan only arise if we use a distorted kink as initial condition for the evolution. Finally, we show that for theØ4 system the oscillations of the kink width come from the excitation of its internal mode, whereas in thesG equation they originate in the excitation of the lowest radiational modes and an internal mode inducedby the discreteness of the numerical simulations.
PB Springer
SN 1434-6028 (print version)
SN 1434-6036 (online version)
YR 2001
FD 2001-01
LK https://hdl.handle.net/10016/15134
UL https://hdl.handle.net/10016/15134
LA eng
NO Work at GISC (Leganés) has been supported by DGESIC (Spain) grant PB96-0119 and by the grant No. BFM2000- 0006.
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RD 1 sept. 2024