Collectivity Embedded in Complex Spectra of Finite Interacting Fermi Systems: Nuclear Example
Abstract
The mechanism of collectivity coexisting with chaos in a finite system of strongly interacting fermions is investigated. The complex spectra are represented in the basis of two-particle two-hole states describing the nuclear double-charge exchange modes in Ca. An example of excitations shows that the residual interaction, which generically implies chaotic behavior, under certain specific and well identified conditions may create strong transitions, even much stronger than those corresponding to a pure mean-field picture. Such an effect results from correlations among the off-diagonal matrix elements, is connected with locally reduced density of states and a local minimum in the information entropy.
Cite
@article{arxiv.chao-dyn/9712010,
title = {Collectivity Embedded in Complex Spectra of Finite Interacting Fermi Systems: Nuclear Example},
author = {S. Drozdz and S. Nishizaki and J. Speth and M. Wojcik},
journal= {arXiv preprint arXiv:chao-dyn/9712010},
year = {2009}
}
Comments
16 pages, LaTeX2e, REVTeX, 8 PostScript figures, to appear in Physical Review E