Superperturbation Theory for Scattering
- 23 December 1966
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 152 (4) , 1471-1474
- https://doi.org/10.1103/physrev.152.1471
Abstract
A new type of perturbation theory for scattering is developed which has the property that the next term in the series is of the order of the square of the preceding term. It is therefore a perturbation theory which is stationary at each stage. A new variational principle for the phase shift is discussed which should be more accurate than standard formulations.Keywords
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