New boson realization of the Lipkin model obeying the su(2)-algebra

ihyaul ulum m.d;

A new boson representation of the su(2)-algebra proposed by the present authors for describing the damped and amplified oscillator is examined in the Lipkin model as one of the simple manyfermion
models. This boson representation is expressed in terms of two kinds of bosons with a certain positive parameter. In order to describe the case of any fermion number, a third boson is introduced. Through this examination, it is concluded that this representation is very workable
for the boson realization of the Lipkin model in any fermion number.