par Suzuki, Yasuyuki ;Horiuchi, Wataru;Baye, Daniel Jean
Référence Progress of Theoretical Physics, 123, 3, page (547-568)
Publication Publié, 2010
Article révisé par les pairs
Résumé : Practical methods to compute dipole strengths for a three-body system by using a discretized continuum are analyzed. New techniques involving Green's function are developed, either by correcting the tail of the approximate wave function in a direct calculation of the strength function or by using a solution of a driven Schrödinger equation in a summed expression of the strength. They are compared with the complex scaling method and the Lorentz integral transform, also making use of a discretized continuum. Numerical tests are performed with a hyperscalar three-body potential in the hyperspherical- harmonics formalism. They show that the Lorentz integral transform method is less practical than the other methods because of a difficult inverse transform. These other methods provide in general comparable accuracies.

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