scholarly journals An advanced multi-orbital impurity solver for dynamical mean field theory based on the equation of motion approach

2012 ◽  
Vol 24 (5) ◽  
pp. 055603 ◽  
Author(s):  
Qingguo Feng ◽  
P M Oppeneer
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Equation Of Motion ◽  
Dynamical Mean Field Theory

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 A dynamical mean field theory for the study of surface diffusion constants

1997 ◽  
Vol 380 (2-3) ◽  
pp. L501-L505 ◽  
Author(s):  
T. Hjelt ◽  
I. Vattulainen ◽  
J. Merikoski ◽  
T. Ala-Nissila ◽  
S.C. Ying
Keyword(s):  
Field Theory ◽  
Surface Diffusion ◽  
Mean Field Theory ◽  
Mean Field ◽  
Dynamical Mean Field Theory ◽  
Diffusion Constants
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