Perturbation theory of the Anderson model
β Scribed by Giuseppe E. Santoro; Gabriele F. Giuliani
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 331 KB
- Volume
- 76
- Category
- Article
- ISSN
- 0038-1098
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π SIMILAR VOLUMES
We test the method of infinitesimal unitary transformations recently introduced by Wegner on the Anderson single impurity model. It is demonstrated that infinitesimal unitary transformations in contrast to the Schrieffer Wolff transformation allow the construction of an effective Kondo Hamiltonian c
In this article we give a detailed discussion of the mass perturbation theory of the massive Schwinger model. After discussing some general features and briefly reviewing the exact solution of the massless case, we compute the vacuum energy density of the massive model and some related quantities. W