The N-Chain Hubbard model in the Composite Operator Method
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We propose a theoretical framework to describe the ladder systems. The N-chain Hubbard model has been studied within the Composite Operator Method. In this scheme of calculations the single-particle Green's function for any number of coupled chains is obtained by solving self-consistently a system of integral equations.
6 pages, 1 embedded Postscript figure, LaTeX, to be published in Physica B
6 pages, 1 embedded Postscript figure, LaTeX, to be published in Physica B