The Mean Number of Phonons of Weak-coupling Polaron in Quantum Disk

In this paper,the mean number of phonons of the weak-coupling polaron in the parabolic quantum disk is investigated by using the improved linear combination operator and the unitary transformation method.Numerical calculations are performed and the results show that the influences of the polaron velocity and the electron with longitudinal-optical phonons coupling strength on the mean number of phonons of the weak-coupling polaron.