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- W2040119958 abstract "We explore the fundamental question of the critical nonlinearity value needed to dynamically localize energy in discrete nonlinear cubic (Kerr) lattices. We focus on the effective frequency and participation ratio of the profile to determine the transition into localization in one-, two-, and three-dimensional lattices. A simple and general criterion is developed, for the case of an initially localized excitation, to define the transition region in parameter space (dynamical tongue) from a delocalized to a localized profile. We introduce a method for computing the dynamically excited frequencies, which helps us validate our stationary ansatz approach and the effective frequency concept. A general analytical estimate of the critical nonlinearity is obtained, with an extra parameter to be determined.We find this parameter to be almost constant for two-dimensional systems and prove its validity by applying it successfully to two-dimensional binary lattices." @default.
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- W2040119958 date "2013-06-19" @default.
- W2040119958 modified "2023-09-27" @default.
- W2040119958 title "Self-trapping transition in nonlinear cubic lattices" @default.
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- W2040119958 doi "https://doi.org/10.1103/physreve.87.062914" @default.
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