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- W3100196191 abstract "In the present work, we introduce a discrete formulation of the nonlinear Dirac equation in the form of a discretization of the Gross-Neveu model. The motivation for this discrete model proposal is both computational (near the continuum limit) and theoretical (using the understanding of the anti-continuum limit of vanishing coupling). Numerous unexpected features are identified including a staggered solitary pattern emerging from a single site excitation, as well as two- and three-site excitations playing a role analogous to one- and two-site, respectively, excitations of the discrete nonlinear Schrodinger analogue of the model. Stability exchanges between the two- and three-site states are identified, as well as instabilities that appear to be persistent over the coupling strength $epsilon$, for a subcritical value of the propagation constant $Lambda$. Variations of the propagation constant, coupling parameter and nonlinearity exponent are all examined in terms of their existence and stability implications and long dynamical simulations are used to unravel the evolutionary phenomenology of the system (when unstable)." @default.
- W3100196191 created "2020-11-23" @default.
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- W3100196191 date "2015-01-12" @default.
- W3100196191 modified "2023-10-16" @default.
- W3100196191 title "Solitary waves in a discrete nonlinear Dirac equation" @default.
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- W3100196191 doi "https://doi.org/10.1088/1751-8113/48/5/055204" @default.
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