Zhao Jian-Gang, Sun Chang-Yong, Liang Bao-Long, Su Jie. Influence of the virtual photon field on the squeezing properties of light field in the system of binomial state field interacting with atomic Bose-Einstein condensateJ. Acta Physica Sinica, 2009, 58(7): 4635-4640. DOI: 10.7498/aps.58.4635