Year: 2014
Author: Yaming Chen, Songhe Song, Huajun Zhu
Advances in Applied Mathematics and Mechanics, Vol. 6 (2014), Iss. 4 : pp. 494–514
Abstract
In this paper, we propose two new explicit multi-symplectic splitting methods for the nonlinear Dirac (NLD) equation. Based on its multi-symplectic formulation, the NLD equation is split into one linear multi-symplectic system and one nonlinear infinite Hamiltonian system. Then multi-symplectic Fourier pseudospectral method and multi-symplectic Preissmann scheme are employed to discretize the linear subproblem, respectively. And the nonlinear subsystem is solved by a symplectic scheme. Finally, a composition method is applied to obtain the final schemes for the NLD equation. We find that the two proposed schemes preserve the total symplecticity and can be solved explicitly. Numerical experiments are presented to show the effectiveness of the proposed methods.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/aamm.2013.m278
Advances in Applied Mathematics and Mechanics, Vol. 6 (2014), Iss. 4 : pp. 494–514
Published online: 2014-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 21
Keywords: Nonlinear Dirac equation multi-symplectic method splitting method explicit method.
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