Kato's perturbation theory is extended to resonant states by using the Laurent expansion of Bloch's Green's function. The effectiveness of this approach is tested on an exactly solvable model.
An Extension of Kato's Perturbation Theory to Resonant States
PASCOLINI, ALESSANDRO
1981
Abstract
Kato's perturbation theory is extended to resonant states by using the Laurent expansion of Bloch's Green's function. The effectiveness of this approach is tested on an exactly solvable model.
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