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Brazilian Journal of Physics

Comparing the Mori formalism and the green function methods

Antonio S. T. Pires, M. E. Gouvêa

Published Sep 1, 2004• 5 citations
Publisher

Abstract

Using a simple model described by a Hamiltonian of fermions coupled to bosons, we show that the relaxation function calculated via a low temperature approximation to the Mori memory function is similar, at least to lowest order, to the relaxation function calculated using a Green function formalism.
DOI
10.1590/s0103-97332004000600009

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