A. Kuriyama et al., A possible boson realization of generalized Lipkin model for many-fermion system - The su(M+1)-algebraic model in non-symmetric boson representation, PROG T PHYS, 105(6), 2001, pp. 933-960
On the basis of the formalism proposed by three of the present authors (A.
K., J. P. & M. Y.), the generalized Lipkin model consisting of (M + 1) sing
le-particle levels is investigated. This model is essentially a kind of the
su(M + 1)-algebraic model and, in contrast to the conventional treatment,
the case in which fermions are partially occupied in each level is discusse
d. The scheme for obtaining the orthogonal set for the irreducible represen
tation is presented.