摘要
Study of the two-photon coherent state or squeezed state has made great progress both in theory and in experiment for the generalization of usual coherent state of the electromagnetic field. The squeezed state can be produced by some nonlinear process and the Hamiltonian which governs the dynamics of squeezed state usually has a quatratic form. The time-dependent Bateman Hamiltonian of damped harmonic oscillator just has
基金
Project supported by the National Natural Science Foundation of China
Fok Yin-Tung Education Foundation
