99 citations · 185 across the 12 of their papers we have counts for
Showing 2000Show all
3 papers · 1 filter
cond-mat.str-el2000
The 1D Hubbard model within the Composite Operator Method
Adolfo Avella, Ferdinando Mancini, Maria del Mar Sanchez-Lopez
Although effective for two dimensional (2D) systems, some approximations may fail in describing the properties of one-dimensional (1D) models, which belong to a different universal…
cond-mat.str-el2000
The sn-pole approximation in the Composite Operator Method
F. Mancini
A well-established method to deal with highly correlated systems is based on the expansion of the Green's function in terms of spectral moments. In the context of the Composite Ope…
cond-mat.stat-mech2000
Equation of Motion Method for Composite Field Operators
Ferdinando Mancini, Adolfo Avella
The Green's function formalism in Condensed Matter Physics is reviewed within the equation of motion approach. Composite operators and their Green's functions naturally appear as b…