Abstract
We review a new iterative procedure to solve the low-lying states of the Schroedinger equation, done in collaboration with Richard Friedberg. For the groundstate energy, the nth order iterative energy is bounded by a finite limit, independent of n; thereby it avoids some of the inherent difficulties faced by the usual perturbative series expansions. For a fairly large class of problems, this new procedure can be proved to give convergent iterative solutions. These convergent solutions include the long standing difficult problem of a quartic potential with either symmetric or asymmetric minima
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Lee, T.D. A New Approach to Solve the Low-lying States of the Schroedinger Equation. J Stat Phys 121, 1015–1071 (2005). https://doi.org/10.1007/s10955-005-5476-9
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DOI: https://doi.org/10.1007/s10955-005-5476-9