S K Kehrein and A Mielke 1994 J. Phys. A: Math. Gen. 27 4259 doi:10.1088/0305-4470/27/12/030
S K Kehrein and A Mielke
Show affiliationsUsing a continuous unitary transformation recently proposed by Wegner(1994) together with an approximation that neglects irrelevant contributions, we obtain flow equations for Hamiltonians. These flow equations yield a diagonal or almost diagonal Hamiltonian. As an example we investigate the Anderson Hamiltonian for dilute magnetic alloys. We study the different fixed points of the flow equations and the corresponding relevant, marginal or irrelevant contributions. Our results are consistent with results obtained by a numerical renormalization-group method, but our approach is considerably simpler.
72.15.Rn Localization effects (Anderson or weak localization)
Issue 12 (21 June 1994)
S K Kehrein and A Mielke 1994 J. Phys. A: Math. Gen. 27 4259
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