Vol 3 - Landau, Lifshitz - Quantum mechanics - non-relativistic theory (3ed., 1991) · Problem 39.2

Perturbation Theory

Physics — Landau & Lifshitz · degenerate-perturbation-second-order-eigenvalues

Problem

Derive the formulae for the correction to the eigenfunctions in the first approximation and to the eigenvalues in the second approximation (for the case of degenerate levels).

Related theory

Second Order Perturbation Theory

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