TWO-EXCITON SQUEEZED STATES AND ITS RECOMBINATION RADIATION IN SEMICONDUCTOR
半导体中的双激子压缩态及其复合辐射

This paper introduces two-exciton squeezed states. For the two cases of "non-Bose" and Bose approximations of one-exciton, the squeezings and the second correlations of quantum and space correlated pairs of excitons, and the squeezings of its recombination radiations are discussed. It is shown that, in these two cases, the Bose approximations of the two-exciton correspond to the contractions of group SU(2) and group SU(1,1) to the group of harmonic oscillator, respectively. The influences of the contractions on the squeezings and correlations of the two-exciton are also given.