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Note on Perturbation Theory

 

作者: Saul T. Epstein,  

 

期刊: American Journal of Physics  （AIP Available online 1954）
卷期: Volume 22, issue 9  

页码: 613-614

 

ISSN:0002-9505

 

年代: 1954

 

DOI:10.1119/1.1933856

 

出版商: American Association of Physics Teachers

 

数据来源: AIP

 

摘要:

Perturbation theory is derived in such a way that the wave function renormalization terms appear automatically. The derivation is based on the Feynman theorem for the rate of change of an eigenvalue with respect to a parameter, and a corresponding theorem for the rate of change of an eigenfunction.

 

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