Using the hyper completeness of the coherent states space,the truncation problem of the infinite dimensional photon number can be effectively avoided,and the rigorous solutions can be obtained in the finite coherent state space.In this paper,the exact solution of the Dicke-Stark model in the coherent state space are achieved,and then the quantum phase transition and time evolution dynamics of the model are discussed.By calculating the average number of photons and average angular momentum of the ground state of the Dicke-Stark model,the phenomenon of quantum phase transition was reproduced,and the critical point of quantum phase transition would shift with the nonlinear Stark interaction.By calculating the phase diagrams of the average photon number and average angular momentum of the Dicke-Stark model with respect to coupling strength and time evolution,the time evolution dynamics of the Dicke-Stark model were presented,the results are helpful to investigate the dynamics of the finite size quantum Dicke-Stark model.
Dicke-Stark modelcoherent states representationaverage photon number
万方数据
维普
