The coherent potential approximation for the density matrix of a random alloy
- 14 July 1976
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 9 (13) , 2515-2518
- https://doi.org/10.1088/0022-3719/9/13/011
Abstract
The density matrix of an Ising model with quenched random interactions is written in terms of a translationally invariant effective Hamiltonian, Heff, with a random perturbation. Heff is determined by requiring, as in the coherent potential approximation, that repeated scatterings from a single site do not affect the partition function. It is shown that Heff describes an annealed random system.Keywords
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