Abstract
Fumi’s theorem in conjunction with some general theorems associated with auxiliary particle methods dictates the functional form of the on-shell auxiliary particle self-energy Σ for a certain class of impurity scattering problems. An explicit calculation which confirms the result is described and the implications for various approaches to the Kondo effect discussed.
- Received 27 December 1994
DOI:https://doi.org/10.1103/PhysRevB.51.10213
©1995 American Physical Society