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Variational approximations for intersite soliton in a cubic-quintic discrete nonlinear Schrödinger equation

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Published under licence by IOP Publishing Ltd
, , Citation Z. Putri N et al 2019 J. Phys.: Conf. Ser. 1317 012015 DOI 10.1088/1742-6596/1317/1/012015

1742-6596/1317/1/012015

Abstract

In this paper, the approximation for stationary soliton solution with intersite-typed configuration in the cubic-quintic DNLS equation for anti-continuum limit is determined by a variational approximation (AV) method. The proposed ansatz is of the form an exponential function with three variational parameters. The obtained VA solutions are then examined its validation and compared with the corresponding numerical solutions. The results show that the VA solutions are valid and provide a very good agreement with the numeric.

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10.1088/1742-6596/1317/1/012015