D. Bazeia, L. Losano, R. Menezes
We study specific deformation of the sine-Gordon model, to get to families of models which starts with the sine-Gordon model itself, including the double sine-Gordon and the triple sine-Gordon model, and so on. The deformation is controlled by two parameters, one very small, used to control a linear expansion on it, and the other, which specifies the particular model in the family are constructed explicitly from the topological defects of the sine-Gordon model. The procedure can be used iteratively, leading to a diversity of possibilities to construct families of models of the sine-Gordon type.
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http://arxiv.org/abs/1210.5473
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