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• W3100655298 abstract "We address the problem of transition front propagation in chains with a bi-stable nondegenerate on-site potential and a nonlinear gradient coupling. For generic nonlinear coupling, one encounters a special regime of transitions, characterized by extremely narrow fronts, far supersonic velocities of the front propagation, and long waves in the oscillatory tail. This regime can be qualitatively associated with a shock wave. The front propagation can be described with the help of a simple reduced-order model; the latter delivers a kinetic law, which is almost not sensitive to the fine details of the on-site potential. Besides, it is possible to predict all main characteristics of the transition front, including its velocity, as well as the frequency and the amplitude of the oscillatory tail. Numerical results are in good agreement with the analytical predictions. The suggested approach allows one to consider the effects of an external pre-load, the next-nearest-neighbor coupling and the on-site damping. When the damping is moderate, it is possible to consider the shock propagation in the damped chain as a perturbation of the undamped dynamics. This approach yields reasonable predictions. When the damping is high, the transition front enters a completely different asymptotic regime of a subsonic kink. The gradient nonlinearity generically turns negligible, and the propagating front converges to the regime described by a simple exact solution for a continuous model with linear coupling." @default.
• W3100655298 created "2020-11-23" @default.
• W3100655298 creator A5041651977 @default.
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• W3100655298 date "2018-02-01" @default.
• W3100655298 modified "2023-09-27" @default.
• W3100655298 title "Propagation of transition fronts in nonlinear chains with non-degenerate on-site potentials" @default.
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• W3100655298 doi "https://doi.org/10.1063/1.5009098" @default.
• W3100655298 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29495680" @default.
• W3100655298 hasPublicationYear "2018" @default.
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