Resumo

JOHNSON, C.W.  e  NAM, H.A.. Collective behavior in random interaction. Rev. mex. fis. [online]. 2006, vol.52, suppl.4, pp.44-48. ISSN 0035-001X.

Recent investigations have looked at the many-body spectra of random two-body interactions. In fermion systems, such as the interacting shell model, one finds pairing-like spectra, while in boson systems, such as IBM-1, one finds rotational and vibrational spectra. We discuss the search for random ensembles of fermion interactions that yield rotational and vibrational spectra, and in particular present results from a new ensemble, the "random quadrupole-quadrupole ensemble".

Palavras-chave : Shell model; chaos in nuclear systems.