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Bezuglova G. S., Goncharov P. P., Gurov J. V., Chechin G. M. Discrete breathers in scalar dynamical models on the plane square lattice. Izvestiya VUZ. Applied Nonlinear Dynamics, 2011, vol. 19, iss. 3, pp. 89-103. DOI: 10.18500/0869-6632-2011-19-3-89-103

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Discrete breathers in scalar dynamical models on the plane square lattice

Bezuglova Galina Sergeevna, Southern Federal University
Goncharov Petr Petrovich, Southern Federal University
Gurov Jurij Vladimirovich, Southern Federal University
Chechin Georgij Mihajlovich, Southern Federal University

All symmetry related invariant manifolds, admitting localized vibrations, for dynamical models on plane square lattice were found by group­theoretical methods. Discrete breathers were constructed on these manifolds for the model with homogeneous potentials of interparticle interactions and their stability was studied. Nontrivial breather solutions which are not nonlinear normal modes by Rosenberg have been revealed for the above model despite it admits space­time separation of dynamical variables. Discrete breathers of the same type were also found in the system of linear coupled Duffing oscillators situated in sites of square lattice. Our approach for studying discrete breathers can be spread to different two­ and three­dimensional space­periodic dynamical models.

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