C.W. Johnson and H.A. Nam
Physics Department, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182–1233, U.S.A.
Recibido el 30 de enero de 2006
Aceptado el 12 de junio de 2006
Abstract
]]> 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".Keywords: Shell model; chaos in nuclear systems.
Resumen
Recientemiente se han investigado los espectros de interacciones aleatorias entre dos cuerpos. En sistemas fermiónicos, como el modelo de capas nucleares, se encuentran espectros con características de apareamiento, mientras sistemas bosónicos, como el modelo de bosones interactuantes, dan lugar a espectros rotacionales y vibracionales. Se discute la búsqueda de conjuntos aleatorios de interacciones fermiónicas con espectros rotacionales y vibracionales. En particular, se propone un conjunto nuevo, el "conjunto aleatorio cuadrupolar–cuadrupolar".
Descriptores: Modelo de capas; caos en sistemas nucleares.
PACS: 21.60.Cs, 24.60.Lz1.
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]]>Acknowledgments
The U.S. Department of Energy supported this investigation through grant DE–FG02–96ER40985.
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