First-Order Quantum Phase Transition for Dicke Model Induced by Atom-Atom Interaction
Zhao Xiu-Qin1, 2, Liu Ni1, †, Liang Jiu-Qing1
(Color online) The ratio of (a) and (b) as the function of the atom-atom interaction q. The plotted collective coupling strength are respectively 1.2 (the red solid line), 1.5 (the green solid line), 1.8 (the violet solid line). The frequency of the light field is .
