Rayleigh-Ritz variation method and connected-moments polynomial approach

Details Rayleigh-Ritz variation method and connected-moments polynomial approach Rayleigh-Ritz variation method and connected-moments polynomial approach

2008-07-09

arxiv.org/abs/0807.1442v1

Physics

Mathematical Physics

Scientific paper

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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