arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2305.08151math-phcs.NAmath.MPmath.NAmath.SPquant-ph
收藏

特征值问题的多点扰动公式

A multipoint perturbation formula for eigenvalue problems

Geneviève Dusson, Louis Garrigue, Benjamin Stamm

AI总结:

针对标准扰动理论无法同时利用多个邻近算子已知本征模的问题,本文推导了一个预解式多点扰动公式,并通过数值算例验证其相比标准方法更具竞争力。

摘要:

特征值问题的标准扰动理论,是在已知某一算子相应本征模的情况下,获取该算子邻域内本征模的近似。然而,如果若干邻近算子的相应本征模均为已知,标准扰动理论无法同时利用所有这些知识来给出更好的近似。我们推导了一个预解式公式,使这种近似结果成为可能,并提供了数值算例,表明该方法比标准扰动理论更具竞争力。

英文摘要:

Standard perturbation theory of eigenvalue problems consists of obtaining approximations of eigenmodes in the neighborhood of an operator where the corresponding eigenmode is known. Nevertheless, if the corresponding eigenmodes of several nearby operators are known, standard perturbation theory cannot simultaneously use all this knowledge to provide a better approximation. We derive a resolvent formula enabling such an approximation result, and provide numerical examples for which this method is more competitive than standard perturbation theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑