scholarly journals Hybrid LDA and generalized tight-binding method for electronic structure calculations of strongly correlated electron systems

2005 ◽  
Vol 72 (16) ◽  
Author(s):  
M. M. Korshunov ◽  
V. A. Gavrichkov ◽  
S. G. Ovchinnikov ◽  
I. A. Nekrasov ◽  
Z. V. Pchelkina ◽  
...  
Keyword(s):  
Tight Binding ◽  
Electronic Structure Calculations ◽  
Strongly Correlated Electron Systems ◽  
Strongly Correlated ◽  
Electron Systems ◽  
Strongly Correlated Electron ◽  
Correlated Electron Systems ◽  
Correlated Electron ◽  
Tight Binding Method ◽  
Structure Calculations

EXACTNESS OF FERMIONIC LINEARIZATION SCHEME WITH CLIFFORD VARIABLES IN d=∞

1995 ◽  
Vol 09 (16) ◽  
pp. 971-975 ◽  
Author(s):  
ARIANNA MONTORSI
Keyword(s):  
Exact Solution ◽  
Single Site ◽  
Strongly Correlated Electron Systems ◽  
Strongly Correlated ◽  
Electron Systems ◽  
Strongly Correlated Electron ◽  
Correlated Electron Systems ◽  
Correlated Electron

We show that the fermionic linearization scheme for dealing with strongly correlated electron systems — when implemented with Clifford variables — becomes exact in the d=∞ limit, at least for Hubbard-like models. In this case, the model is mapped exactly into a single-site problem. The conditions under which such a feature allows to obtain an exact solution are also discussed.

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