Conformal structure-preserving method for damped nonlinear Schrdinger equation
In this paper,we propose a conformal momentum-preserving method to solve a damped nonlinear Schrodinger（DNLS） equation.Based on its damped multi-symplectic formulation,the DNLS system can be split into a Hamiltonian part and a dissipative part.For the Hamiltonian part,the average vector field（AVF） m...
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| Published in | 中国物理B：英文版 no. 11; pp. 119 - 127 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
2016
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| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 |
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| Summary: | In this paper,we propose a conformal momentum-preserving method to solve a damped nonlinear Schrodinger（DNLS） equation.Based on its damped multi-symplectic formulation,the DNLS system can be split into a Hamiltonian part and a dissipative part.For the Hamiltonian part,the average vector field（AVF） method and implicit midpoint method are employed in spatial and temporal discretizations,respectively.For the dissipative part,we can solve it exactly.The proposed method conserves the conformal momentum conservation law in any local time-space region.With periodic boundary conditions,this method also preserves the total conformal momentum and the dissipation rate of momentum exactly.Numerical experiments are presented to demonstrate the conservative properties of the proposed method. |
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| Bibliography: | preserving servation exactly conservative momentum conformal Hamiltonian preserve implicit split In this paper,we propose a conformal momentum-preserving method to solve a damped nonlinear Schrodinger（DNLS） equation.Based on its damped multi-symplectic formulation,the DNLS system can be split into a Hamiltonian part and a dissipative part.For the Hamiltonian part,the average vector field（AVF） method and implicit midpoint method are employed in spatial and temporal discretizations,respectively.For the dissipative part,we can solve it exactly.The proposed method conserves the conformal momentum conservation law in any local time-space region.With periodic boundary conditions,this method also preserves the total conformal momentum and the dissipation rate of momentum exactly.Numerical experiments are presented to demonstrate the conservative properties of the proposed method. 11-5639/O4 |
| ISSN: | 1674-1056 2058-3834 |