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A new approach for calculating spectral density functions of stronglycorrelated electron systems is proposed within the exact diagonalization methodof dynamical mean-field theory (DMFT). This approach is based on the analyticcontinuation of spectral density function obtained by conventional exactdiagonalization method of DMFT and its results are more reasonable in shape. Asan example of its application, the Mott transition in a strongly correlatedelectron system is investigated using this new approach.

A calculation scheme for spectral densities of strongly correlated electron systems using exact diagonalization of dynamical mean field theory