2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92291A revised new iterative method based on Green function defined by quadratures along a single trajectory is developed and applied to solve the ground state of the double-well potential. The result is compared to the one based on the original iterative method. The limitation of the asymptotic expansion is also discussed.19 pagesQuantum Physicstext