Smearing Formulas for Density Matrices
arXiv:1107.0289
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.
4 pages, 1 figure, Conference "Path Integrals from peV to TeV: 50 Years after Feynman's Paper", Florence, Italy (1998)