RT Journal Article
T1 Two-level interacting boson models beyond the mean field
A1 Arias Carrasco, José Miguel
A1 Dukelsky, J.
A1 García Ramos, José Enrique
A1 Vidal, Julien
K1 Bosones
K1 Física nuclear
AB The phase diagram of two-level boson Hamiltonians, including the Interacting Boson Model(IBM), is studied beyond the standard mean field approximation using the Holstein-Primakoff mapping.The limitations of the usual intrinsic state (mean field) formalism concerning finite-size effectsare pointed out. The analytic results are compared to numerics obtained from exact diagonalizations.Excitation energies and occupation numbers are studied in different model space regions(Casten triangle for IBM) and especially at the critical points.
PB American Physical Society
SN 0556-2813
YR 2007
FD 2007-01-02
LK http://hdl.handle.net/10272/5458
UL http://hdl.handle.net/10272/5458
LA eng
NO Arias Carrasco, J.M., Dukelsky, J., García Ramos, J.E., Vidal, J.: "Two-level interacting boson models beyond the mean field". Physical Review C . Vol. 75, n. 1 (2007). ISSN 0556-2813
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026