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    Stationary Modes and Localized Metastable States in a Triangular Lattice of Active Particles

    2018, Vol. 14, no. 2, pp.  195-207

    Author(s): Sergeev K. S., Dmitriev S. V., Korznikova E. A., Chetverikov A. P.

    The dynamics of a triangular lattice consisting of active particles is studied. Particles with nonlinear friction interact via nonlinear forces of Morse potential. Nonlinear friction slows down fast particles and accelerates slow ones. Each particle interacts mainly with the nearest neighbors due to the choice of the cut-off radius.
    Stationary modes (attractors) and metastable states of the lattice are studied by methods of numerical simulation.
    It is shown that the main attractor of the system under consideration is the so-called translational mode — the state with equal and unidirectional velocities of all particles. For some parameter values translational modes with defects in the form of vacancies and interstitial particles are possible.
    Metastable localized states are presented by the plane soliton-like waves (M-solitons) with inherent velocity and density maxima. The lifetime of such states depends on the lattice parameters and the wavefront width. All metastable states transform into the translational mode after a transient process.
    Keywords: lattices, active particles, solitons, Morse potential
    Citation: Sergeev K. S., Dmitriev S. V., Korznikova E. A., Chetverikov A. P., Stationary Modes and Localized Metastable States in a Triangular Lattice of Active Particles, Rus. J. Nonlin. Dyn., 2018, Vol. 14, no. 2, pp.  195-207

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