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arXiv 2101.09043math.NAcs.NA
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与特征向量相关的非线性本征值问题的同伦方法

Homotopy Methods for Eigenvector-Dependent Nonlinear Eigenvalue Problems

Xuping Zhang, Haimei Huo

摘要:

考虑了Gross-Pitaevskii方程的有限差分离散所引起的特征向量相关的非线性本征值问题。证明了一维和二维情形下正特征向量的存在唯一性和一维情形下反对称特征向量的存在性。为了计算激发态和基态对应的本征对,分别构造了一维和二维问题的同伦,并证明了同伦路径是正则有界的.数值结果验证了理论推导的一维和二维问题。

英文摘要:

Eigenvector-dependent nonlinear eigenvalue problems are considered which arise from the finite difference discretizations of the Gross-Pitaevskii equation. Existence and uniqueness of positive eigenvector for both one and two dimensional cases and existence of antisymmetric eigenvector for one dimensional case are proved. In order to compute eigenpairs corresponding to excited states as well as ground state, homotopies for both one and two dimensional problems are constructed respectively and the homotopy paths are proved to be regular and bounded. Numerical results are presented to verify the theories derived for both one and two dimensional problems.

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