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Rayleigh-Ritz variation method and connected-moments polynomial approach - MaRDI portal

Rayleigh-Ritz variation method and connected-moments polynomial approach

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Publication:6210185

DOI10.1002/QUA.21854arXiv0807.1442MaRDI QIDQ6210185

Francisco M. Fernández

Publication date: 9 July 2008

Abstract: We show that the connected-moments polynomial approach proposed recently is equivalent to the well known Rayleigh-Ritz variation method in the Krylov space. We compare the latter with one of the original connected-moments methods by means of a numerical test on an anharmonic oscillator












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