中国物理B ›› 2004, Vol. 13 ›› Issue (8): 1269-1275.doi: 10.1088/1009-1963/13/8/015
辛宗政1, 吴炜2, 吴令安3
Wu Wei (吴炜)ab, Wu Ling-An (吴令安)b, Xin Zong-Zheng (辛宗政)a
摘要: By applying higher powers of the Bogoliubov transformation operator b^{\dagger }=ν^*a+μ^*a^{\dagger } to the two-photon coherent states (or minimum uncertainty squeezed states) we construct a new type of quantum state which we call the generalized excited two-photon coherent states. Analytic expressions for the quantum statistical properties are derived, and through numerical computation the phase space quasi-probability distributions are found. These states can exhibit highly nonclassical behaviour depending on the degree of excitation m and other parameters. For particular values of two parameters λ and ρ, these generalized states reduce to other classes of coherent states formerly reported. Our theory thus presents a much broader approach to these types of quantum states.
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