Rayleigh–Ritz variation method and connected‐moments polynomial approach |
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| Authors: | Francisco M Fernández |
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| Institution: | INIFTA (UNLP, CCT La Plata‐CONICET), División Química Teórica, Diag. 113 y 64 (S/N), Sucursal 4, Casilla de Correo 16, 1900 La Plata, Argentina |
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| 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. © 2008 Wiley Periodicals, Inc. Int J Quantum Chem, 2009 |
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| Keywords: | Rayleigh– Ritz variation method connected‐moments method connected‐moments polynomial approach eigenvalues Krylov space |
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