The Hubbard model at high dimensions: self-consistent weak coupling theory

1991 ◽  
Vol 82 (2) ◽  
pp. 237-242 ◽  
Author(s):  
B. Menge ◽  
E. M�ller-Hartmann
Keyword(s):  
Hubbard Model ◽  
Weak Coupling ◽  
Coupling Theory ◽  
High Dimensions ◽  
Self Consistent ◽  
Weak Coupling Theory

Weak coupling theory of the Hubbard model in high dimensions

1994 ◽  
Vol 194-196 ◽  
pp. 1071-1072
Author(s):  
Dai S. Hirashima
Keyword(s):  
Hubbard Model ◽  
Weak Coupling ◽  
Coupling Theory ◽  
High Dimensions ◽  
Weak Coupling Theory

Phase separation, charge-transfer instability, and superconductivity in the three-band extended Hubbard model: Weak-coupling theory

1991 ◽  
Vol 43 (16) ◽  
pp. 13724-13727 ◽  
Author(s):  
Yunkyu Bang ◽  
G. Kotliar ◽  
C. Castellani ◽  
M. Grilli ◽  
R. Raimondi
Keyword(s):  
Phase Separation ◽  
Charge Transfer ◽  
Hubbard Model ◽  
Weak Coupling ◽  
Coupling Theory ◽  
Extended Hubbard Model ◽  
Weak Coupling Theory

A WEAK COUPLING THEORY FOR La2CuO4: ln2–PARQUET APPROACH

1988 ◽  
Vol 02 (05) ◽  
pp. 667-677 ◽  
Author(s):  
I. E. Dzyaloshinskii ◽  
V. M. Yakovenko
Keyword(s):  
Fermi Surface ◽  
Hubbard Model ◽  
Weak Coupling ◽  
Weak Coupling Limit ◽  
Two Dimensional ◽  
Coupling Theory ◽  
Strong Difference ◽  
Effective Charges ◽  
Weak Coupling Theory

In the model of two-dimensional electrons with a square Fermi surface , ln 2-parquet equations are derived and numerically solved. It is suggested that this model can describe La 2 CuO 4 in the weak coupling limit. The main result is a strong difference between the Hubbard model with one charge and the model with four effective charges, describing an interaction of a general form.

Thermodynamics of superconducting magnetic alloys in the weak coupling theory

1975 ◽  
Vol 19 (5-6) ◽  
pp. 467-480 ◽  
Author(s):  
John Lam
Keyword(s):  
Weak Coupling ◽  
Coupling Theory ◽  
Magnetic Alloys ◽  
Weak Coupling Theory

Aspects of the weak-coupling theory of open systems

1983 ◽  
Vol 61 (11) ◽  
pp. 1479-1485 ◽  
Author(s):  
I. D. Cox ◽  
W. E. Hagston ◽  
B. J. Holmes
Keyword(s):  
Perturbation Theory ◽  
Open System ◽  
Weak Coupling ◽  
Open Systems ◽  
Higher Order ◽  
Projection Operators ◽  
Coupling Theory ◽  
Weak Coupling Theory ◽  
Damping Theory ◽  
Insight Into

Damping theory of an open system S is usually formulated in terms of projection operators which introduce nonuniqueness into the analysis. An insight into the nature of the approximations that arise from this aspect of the formalism is revealed by considering systems of varying complexity. This leads to the conclusion that the results of higher order perturbation theory approximations may not be meaningful.

On a weak-coupling theory of superconducting magnetic alloys

1975 ◽  
Vol 19 (1-2) ◽  
pp. 113-124 ◽  
Author(s):  
John Lam
Keyword(s):  
Weak Coupling ◽  
Coupling Theory ◽  
Magnetic Alloys ◽  
Weak Coupling Theory
Sign in / Sign up

Export Citation Format

Share Document