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Smearing Formulas for Density Matrices (1107.0289v1)
Published 1 Jul 2011 in cond-mat.stat-mech and quant-ph
Abstract: We report on the development of a systematic variational perturbation theory for the euclidean path integral representation of the density matrix based on new smearing formulas for harmonic correlation functions. As a first application, we present the lowest-order approximation for the radial distribution function of an electron in a hydrogen atom.
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