Abstract
New variational Schwinger functionals are introduced. These functionals are based on any Green's operator G/sub /k, where the subscript k denotes any kind of decomposition of the total Hamiltonian. It overcomes a difficulty of previous functionals containing only G/sub /i or G/sub /f, where these Coulomb Green's operators include the full final and initial perturbations respectively. Unlike previous functionals, the expressions introduced here could be calculated exactly if suitable G/sub /k were chosen. Second-order Faddeev-type functionals (L.D. Faddeev 1961) and third-order variational functionals are calculated. The functionals are applied to a one-dimensional collision of two particles interacting with square wells.
Published Version
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