Statics and dynamics of an inhomogeneously nonlinear lattice

We introduce an inhomogeneously nonlinear Schrödinger lattice, featuring a defocusing segment, a focusing segment and a transitional interface between the two. We illustrate that such inhomogeneous settings present vastly different dynamical behavior in the vicinity of the interface than the one exp...

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Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2006-09, Vol.74 (3 Pt 2), p.036602-036602, Article 036602
Main Authors: Machacek, Debra L, Foreman, Elizabeth A, Hoq, Q E, Kevrekidis, P G, Saxena, A, Frantzeskakis, D J, Bishop, A R
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container_title Physical review. E, Statistical, nonlinear, and soft matter physics
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creator Machacek, Debra L
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description We introduce an inhomogeneously nonlinear Schrödinger lattice, featuring a defocusing segment, a focusing segment and a transitional interface between the two. We illustrate that such inhomogeneous settings present vastly different dynamical behavior in the vicinity of the interface than the one expected in their homogeneous counterparts. We analyze the relevant stationary states, as well as their stability, by means of perturbation theory and linear stability analysis. We find good agreement with the numerical findings in the vicinity of the anticontinuum limit. For larger values of the coupling, we follow the relevant branches numerically and show that they terminate at values of the coupling strength which are larger for more extended solutions. The dynamical development of relevant instabilities is also monitored in the case of unstable solutions.
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title Statics and dynamics of an inhomogeneously nonlinear lattice
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