Figure 3
From: Tunable Spin-orbit Coupling and Quantum Phase Transition in a Trapped Bose-Einstein Condensate
Plot of the COM motion period T versus γeff and Ω0.
The insets show the corresponding 〈x (t)〉. The green line is the theoretical prediction 
from the Dicke model. The circles are the numerical results from the G-P equation (2). T0 = 2π/ωy, D = 1.
