Study studies kink behavior in nonlinear systems, suggesting significant modifications to profiles.
We use perturbation theory to study kinks in nonlinear Klein–Gordon (ϕ4 and sine-Gordon) chains and in a discrete series-connected Josephson transmission line. The expansion parameter is the ratio of the lattice period to the kink width. The next-to-leading-order approximation modifies the kink profiles obtained previously in the leading-order approximation.
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E. Kogan (2026) studied this question.
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