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Oscillating decay in an unstable system

par Antoniou, Ioannis ;Karpov, Evgueni ;Pronko, G.P.;Iarevski, Evgueni
Référence International journal of theoretical physics, 42, page (2403-2421)
Publication Publié, 2003

Article révisé par les pairs

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Résumé :

We study the medium-time behavior of the survival probability in the frame of the N-level Friedrichs model. The time evolution of an arbitrary unstable initial state is determined. We show that the survival probability may oscillate significantly during the so-called exponential era. This result explains qualitatively the experimental observations of the NaI decay. The Gamow states for N-level Friedrichs model are constructed. The time evolution in terms of the complex spectral representation including the Gamow states is discussed.