Energy-preserving methods for non-smooth nonlinear Schrödinger equations
Energy-preserving methods for non-smooth nonlinear Schrödinger equations
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非光滑非线性薛定谔方程的能量守恒方法
DOI:
10.1016/j.apnum.2022.11.017
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发表时间:
2022-11
影响因子:
2.8
通讯作者:
Chun Li
中科院分区:
文献类型:
--
作者:
Jiejing Bai;Hassan Ullah;Chun Li
In this paper, we propose energy-preserving methods for nonlinear Schrödinger equations (NLSEs) with delta potentials. We reformulate the prototype model equation into an infinite-dimensional Hamiltonian system (IDHS), apply the average vector field (AVF) method to the time, and obtain the corresponding temporal semi-discrete system which possesses exact energy preservation properties. Then we apply the immersed interface method (IIM) to discretize the space of the semi-discrete system and get a scheme of full-discrete systems. The scheme preserves the discrete total energy precisely and admits, however, just first-order local accuracy. In order to improve the accuracy, we give some modifications for the scheme and get a second-order method as desired. The precise preservation of the discrete energy is rigorously proved for the modified scheme. Extensive numerical experimentation for cases of single- and double-delta potentials is examined and discussed, and different comparisons are made to validate the theoretical analyses. Together with the normalization conservation law and some convergence behaviours, it demonstrates that our methods are considerably good in the long-term calculations, especially the superiorities of preserving the energy conservation laws.
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影响因子:
1.3
作者:
Hao Wu
通讯作者:
Hao Wu
影响因子:
4
作者:
Qian Xu;Fu Hao;Song Songhe
通讯作者:
Song Songhe
影响因子:
3.7
作者:
J. Bourgain
通讯作者:
J. Bourgain
DOI:
10.1007/s00526-017-1145-5
发表时间:
2017-03
影响因子:
2.1
作者:
M. Schechter
通讯作者:
M. Schechter
DOI:
10.1137/030601211
发表时间:
2003-10
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
W. Bao;Jie Shen
通讯作者:
W. Bao;Jie Shen