A class of solvable models in Condensed Matter Physics

Details A class of solvable models in Condensed Matter Physics A class of solvable models in Condensed Matter Physics

2007-07-25

arxiv.org/abs/0707.3839v1

Condens. Matter Phys. 9, 393 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

In this paper, we show that there is a large class of fermionic systems for which it is possible to find, for any dimension, a finite closed set of eigenoperators and eigenvalues of the Hamiltonian. Then, the hierarchy of the equations of motion closes and analytical expressions for the Green's functions are obtained in terms of a finite number of parameters, to be self-consistently determined. Several examples are given. In particular, for these examples it is shown that in the one-dimensional case it is possible to derive by means of algebraic constraints a set of equations which allow us to determine the self-consistent parameters and to obtain a complete exact solution.

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