𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Fourth-order invariant in Rayleigh–Schrödinger perturbation theory

✍ Scribed by Stephen Wilson

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
84 KB
Volume
18
Category
Article
ISSN
0020-7608

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Feenberg scaling and higher-order invari
Feenberg scaling and higher-order invariants in Rayleigh–Schrödinger perturbation theory
✍ Kamal Bhattacharyya 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 190 KB

## Abstract It is shown that the determination of a unique scaling parameter, based on scale‐invariant forms for energy in the scaled zero‐order Hamiltonian approach of Feenberg, is not possible because the higher‐order invariants themselves are nonunique.

The generating equations of Rayleigh—Sch
The generating equations of Rayleigh—Schrödinger perturbation theory
✍ Carlos E. Soliverez; Eduardo Gagliano 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 361 KB

A set of non-lmear cqustlons LS given winch solves the stationary Schrodmgcr equalion III terms of a known subproblem. An ItemlIve solution of the equations ylclds the degenerate version of Raylegh-SchrBdmgcr perturbation theory, but olhcr approxunatlon schemes, as well as a purely numerIca solullon

A diagrammatic interpretation of formal
A diagrammatic interpretation of formal Rayleigh—Schrödinger perturbation theory
✍ Valdimír Kvasnička 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 751 KB

A diagammatic,interprct~tion of the formal (i.e.; without second quantization ~ormalismj quasi-degenerate Rayleigh-Sciuiidinger perturbation theory with non-hem+ian model hamiltonian is suggested. fn this appro&. : the diagrammatic expressions for the Bloch wave operator U as well as for the model

Variants of Rayleigh–Schrödinger perturb
Variants of Rayleigh–Schrödinger perturbation theory—a new look
✍ Kamal Bhattacharyya 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 648 KB

## Abstract Several useful “redefined zero‐order Hamiltonian” variants of the Rayleigh–Schrödinger perturbation theory are derived by exploiting the freedom of choice for the orthogonality integral between zero‐ and first‐order wavefunctions. It is found that the more common Hamiltonian repartition