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Analytic criterion for soliton instability in a nonlinear fiber array
Phys. Rev. E 52, 5549 – Published 1 November, 1995
DOI: https://doi.org/10.1103/PhysRevE.52.5549
Abstract
The stability problem for the so-called continuous-discrete solitons in a nonlinear fiber array is examined. We prove that the ground states are unstable if the first derivative of the ‘‘energy’’ integral P=F‖dt with respect to the soliton parameter is negative.
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