Role of three-particle vertex within dual fermion calculations
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DOI: 10.1103/physrevb.96.235127
Abstract: We investigate the influence of self-energy diagrams beyond the two-particle vertex level within dual fermion theory. Specifically, we calculate the local three-particle vertex and construct from it selected dual fermion self-energy corrections to dynamical mean… read more here.
Keywords: self energy; dual fermion; three particle; particle vertex ... See more keywords
Impact of self-consistency in dual fermion calculations
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DOI: 10.1103/physrevb.98.125106
Abstract: The dual fermion (DF) method allows for calculating corrections due to non-local correlations relative to an effective impurity model. Choosing the impurity as that of a dynamical mean field theory (DMFT) solution at self-consistency is… read more here.
Keywords: consistency dual; self consistency; dual fermion; impact self ... See more keywords