scholarly journals Dynamical mean-field approach with predictive power for strongly correlated materials

2017 ◽  
Vol 226 (11) ◽  
pp. 2439-2443 ◽  
Author(s):  
D. Vollhardt ◽  
A. I. Lichtenstein
Keyword(s):  
Predictive Power ◽  
Mean Field ◽  
Strongly Correlated ◽  
Strongly Correlated Materials ◽  
Field Approach

Static and Dynamic Properties of a Two-Dimensional Charged Bose Fluid

1998 ◽  
Vol 12 (12) ◽  
pp. 459-465 ◽  
Author(s):  
E. Strepparola ◽  
M. P. Tosi
Keyword(s):  
Coulomb Potential ◽  
Ground State ◽  
Coupling Strength ◽  
Dynamic Properties ◽  
Complete Solution ◽  
Mean Field ◽  
Strongly Correlated ◽  
Two Dimensional ◽  
Large Coupling ◽  
Field Approach

A complete solution of the Singwi–Tosi–Land–Sjölander approximation is given for the ground state and the elementary excitations of a fluid of charged bosons interacting via the two-dimensional ln (r) Coulomb potential at arbitrarily large coupling strength r s . The results are used to discuss the limitations of a static-mean-field approach in such a strongly correlated system.

scholarly journals EQUATION-OF-MOTION APPROACH TO DYNAMICAL MEAN FIELD THEORY

2006 ◽  
Vol 20 (25) ◽  
pp. 1629-1636 ◽  
Author(s):  
JIAN-XIN ZHU ◽  
R. C. ALBERS ◽  
J. M. WILLS
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Bethe Lattice ◽  
Equation Of Motion ◽  
Spectral Weight ◽  
Dynamical Mean Field Theory ◽  
Strongly Correlated ◽  
Strongly Correlated Materials ◽  
Weight Transfer

We propose using an equation-of-motion approach as an impurity solver for dynamical mean field theory. As an illustration of this technique, we consider a finite-U Hubbard model defined on the Bethe lattice with infinite connectivity at arbitrary filling. Depending on the filling, the spectra that is obtained exhibits a quasiparticle peak, and lower and upper Hubbard bands as typical features of strongly correlated materials. The results are also compared and in good agreement with exact diagonalization. We also find a different picture of the spectral weight transfer than the iterative perturbation theory.

scholarly journals Cellular Dynamical Mean Field Approach to Strongly Correlated Systems

2001 ◽  
Vol 87 (18) ◽  
Author(s):  
Gabriel Kotliar ◽  
Sergej Y. Savrasov ◽  
Gunnar Pálsson ◽  
Giulio Biroli
Keyword(s):  
Mean Field ◽  
Strongly Correlated Systems ◽  
Strongly Correlated ◽  
Correlated Systems ◽  
Field Approach
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