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- W4249494072 abstract "The two approximation methods described in this chapter-the variational method and the perturbation method-are widely used in quantum mechanics, and has applications to other disciplines as well. The chapter describes the variational method and gives a simple example of how it is used to estimate eigenenergies and eigenfunctions. It explains the perturbation method for increasingly complex examples. The chapter deals with the time-independent perturbation theory for nondegenerate states. It covers the time-independent perturbation for degenerate states, and introduces the idea of “good” states. The chapter presents the time-dependent perturbation theory. It ends with a discussion of Fermi's golden rule. Controlled Vocabulary Terms Cavity resonators; degenerate semiconductors; Fermi level" @default.
- W4249494072 created "2022-05-12" @default.
- W4249494072 date "2012-01-06" @default.
- W4249494072 modified "2023-09-23" @default.
- W4249494072 title "Approximation Methods" @default.
- W4249494072 cites W4297789653 @default.
- W4249494072 doi "https://doi.org/10.1002/9781118169780.ch10" @default.
- W4249494072 hasPublicationYear "2012" @default.
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