Alternative to Gutzwiller's approach

Lamba, Sushil ; Joshi, S. K. (1995) Alternative to Gutzwiller's approach Physical Review B, 52 (11). pp. 7972-7975. ISSN 0163-1829

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An efficient variational procedure to calculate the ground-state properties of the particle-hole symmetric periodic Anderson model is presented. Expectation values are calculated by using an approximate scheme. It is shown that the ground-state energy calculated with the one-site approximation, which essentially is a single-site mean-field approximation, is identical to the corresponding energy obtained by the well-known Gutzwiller wave function using the Gutzwiller approximation. The two-site approximation, in which intersite correlations are explicitly included, is shown to be a better approximation than the Gutzwiller approximation.

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ID Code:14419
Deposited On:12 Nov 2010 09:19
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