Distribution of resonance widths and dynamics of continuum coupling

G. L. Celardo, N. Auerbach, F. M. Izrailev, V. G. Zelevinsky

Research output: Contribution to journalArticlepeer-review


We analyze the statistics of resonance widths in a many-body Fermi system with open decay channels. Depending on the strength of continuum coupling, such a system reveals growing deviations from the standard chi-square (Porter-Thomas) width distribution. The deviations emerge from the process of increasing interaction of intrinsic states through common decay channels; in the limit of perfect coupling this process leads to the superradiance phase transition. The width distribution depends also on the intrinsic dynamics (chaotic versus regular). The results presented here are important for understanding the recent experimental data concerning the width distribution for neutron resonances in nuclei.

Original languageEnglish
Article number042501
JournalPhysical Review Letters
Issue number4
StatePublished - 24 Jan 2011


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