
Accession Number : AD0628120
Title : A NOTE ON THE VARIATIONPERTURBATION METHOD FOR EXCITED STATES.
Descriptive Note : Technical rept.,
Corporate Author : MALLINCKRODT CHEMICAL LAB HARVARD UNIV CAMBRIDGE MASS
Personal Author(s) : Miller,William H.
Report Date : 1964
Pagination or Media Count : 6
Abstract : Sinanoglu has shown that the variationperturbation method yields an upper bound to the secondorder perturbation energy for an excited state if the form of the trial function is suitably restricted. It is shown that the restriction on the trial function can in principle be relaxed from the one specified by Sinanoglu. From this more general form of the constraint it is easy to see why approximate calculations that impose no restrictions at all on the trial function are very likely to give a secondorder perturbation energy which lies above the true value. (Author)
Descriptors : (*EXCITATION, PERTURBATION THEORY), (*PERTURBATION THEORY, CALCULUS OF VARIATIONS), QUANTUM THEORY, MATRICES(MATHEMATICS)
Subject Categories : Physical Chemistry
Quantum Theory and Relativity
Distribution Statement : APPROVED FOR PUBLIC RELEASE