A perturbation inspired variational technique
Abstract
The paper discusses how the Variationally-Improved Perturbation Theory (VIPT) scheme of approximation in quantum mechanics can be improved convergence-wise if one uses for variational trial functions the perturbative series with variational parameter, so that one is effectively doing variational calculations directly on the high-order perturbative series for energy. The result optimizes the high-order energy directly and thus represents a significant improvement over the VIPT procedure.
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Creating essential bridges uniting physics, society and industry
22-25 October 2003, University of San Carlos, Cebu City