A general resonance theory based on Mourre's inequality

Details A general resonance theory based on Mourre's inequality A general resonance theory based on Mourre's inequality

2005-07-25

arxiv.org/abs/math-ph/0507063v1

Physics

Mathematical Physics

17 pages

Scientific paper

10.1007/s00023-005-0261-5

We study the perturbation of bound states embedded in the continuous spectrum which are unstable by the Fermi Golden Rule. The approach to resonance theory based on spectral deformation is extended to a more general class of quantum systems characterized by Mourre's inequality and smoothness of the resolvent. Within the framework of perturbation theory it is still possible to give a definite meaning to the notion of complex resonance energies and of corresponding metastable states. The main result is a quasi-exponential decay estimate up to a controlled error of higher order in perturbation theory.

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