Explicit Formulas inDegenerateRayleigh-Schrödinger Perturbation Theory for the Energy and Wave Function, Based on a Formula of Lagrange
- 1 December 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 4 (6) , 2191-2199
- https://doi.org/10.1103/physreva.4.2191
Abstract
The solution for the energy and wave function in degenerate Rayleigh-Schrödinger perturbation theory is obtained via a formula of Lagrange. The derivation involves manipulation of the Brillouin-Wigner formulas in a manner similar to the "repeated-partitioning" technique.Keywords
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