On the properties of the effective interaction for a simple 2 × 2 matrix
Abstract
A 2 × 2 matrix is used to discuss the properties of the effective interaction. We fine that while the perturbation series ordered in powers of the perturbing Hamiltonian may diverge, it is possible to reorder the series such that it is convergent. In some cases it is found to converge to the lower eigenvalue and in some cases to the upper one.
Visitor, winter 1973, supported by the Science Research Council.- Publication:
-
Physics Letters B
- Pub Date:
- August 1973
- DOI:
- 10.1016/0370-2693(73)90634-5
- Bibcode:
- 1973PhLB...45..425E