The Sine-Gordon Wobble

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Nonperturbative, oscillatory, winding number one solutions of the Sine-Gordon equation are presented and studied numerically. We call these nonperturbative shape modes {\sl wobble} solitons. Perturbed Sine-Gordon kinks are found to decay to {\sl wobble} solitons.
Revised version, journal reference: Journal of physics A 37, 11603 (2004)

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