𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A one-dimensional field theory with degenerate vacuum

✍ Scribed by K. Baumann; R. Sexl


Publisher
Elsevier Science
Year
1961
Weight
305 KB
Volume
26
Category
Article
ISSN
0029-5582

No coin nor oath required. For personal study only.


πŸ“œ SIMILAR VOLUMES


On field theories with degenerate ground
✍ K Baumann; G Eder; R Sexl; W Thirring πŸ“‚ Article πŸ“… 1961 πŸ› Elsevier Science 🌐 English βš– 444 KB

A model field theory of the superconducting type is solved exactly. The exact solution is compared with the Bardeen-Cooper-schrieffer solution. The exact ground state is nondegenerate while the Bardeen-Cooper-fohriefter ground state is degenerate. The connection between the two types of ground state

The one-dimensional Ising model with a t
✍ Pierre Pfeuty πŸ“‚ Article πŸ“… 1970 πŸ› Elsevier Science 🌐 English βš– 448 KB

The one-dimensional Ising model with a transverse field is solved exactly by transforming the set of Pauli operators to a new set of Fermi operators. The elementary excitations, the ground-state energy and the free energy are found. The instantaneous correlation function between any two spins is cal

Quasi-degenerate perturbation theory wit
✍ Haruyuki Nakano; Ryuma Uchiyama; Kimihiko Hirao πŸ“‚ Article πŸ“… 2002 πŸ› John Wiley and Sons 🌐 English βš– 158 KB

## Abstract The quasi‐degenerate perturbation theory (QDPT) with complete active space (CAS) self‐consistent field (SCF) reference functions is extended to the general multiconfiguration (MC) SCF references functions case. A computational scheme that utilizes both diagrammatic and sum‐over‐states a