In this paper we study a model polariton system. With the photons and the p
honons being initially prepared in coherent state and vacuum state respecti
vely, we show that as time evolves, the distributions of photons, phonons,
and polaritons can be sub-Poissonian, and the photon quadrature squeezing t
he phonon quadrature squeezing, and the polariton quadrature squeezing can
exist in this system.