General form of the Hamiltonian to generate single-modesqueezed states

【摘要】 <正> The optical fields in squeezed states are typical nonclassical fields.They play animportant role in many fields,such as the detection of very weak singles and the quantumnondemolition measurements.Squeezed states have been generated in experiment bymany nonlinear optical processes.Recently the probability of generating squeezed states bymass-varying or frequency-varying harmornic oscillators was discussed and under someapproximations the problem of these oscillators has been solved.In this note we give更多还原