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Showing 1 to 2 of 2 for “"cluster perturbation theory"”.
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Spectral properties of strongly correlated electron systems
… B 32 429 (2003)], we present an extension of the cluster-perturbation theory (CPT) to systems with spontaneous broken symmetry. Our method accounts for both short-range correlations and long-range order. Short-range correlations are accurately taken into account via the exact diagonalization of …
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Exact Diagonalization Studies of Strongly Correlated Systems
… is meant by strongly correlated. Then, we extend cluster perturbation theory (CPT), an economic method for computing the momentum and energy resolved Green's function for Hubbard models to higher order correlation functions, specifically the spin susceptibility. We benchmark our results for the …