Article,

Prony's method and the connected-moments expansion

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Physica Scripta, 87 (2): 025006 (2013)
DOI: 10.1088/0031-8949/87/02/025006

Abstract

We show that Prony's method provides the full solution to the nonlinear equations of the connected-moments expansion (CMX). Knowledge of all the parameters in the CMX ansatz is useful for the analysis of the convergence properties of the approach. Prony's method may also be suitable for the calculation of the correlation function for simple quantum-mechanical models.

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