Generalized coherent-squeezed-state expansion for the super-radiant phase transition
Generalized coherent-squeezed-state expansion for the super-radiant phase transition
We develop a coherent-squeezed-state expansion for the ground state of the quantum phase transition in the quantum Rabi model. The wave function undergoes a transition from a localized state in the normal phase to a two-peaks delocalized state in the super-radiant phase. Interestingly, the two displaced wave packets are squeezed …