Figure 2
From: Tunable Spin-orbit Coupling and Quantum Phase Transition in a Trapped Bose-Einstein Condensate
Quantum phase transition with tunable γeff.
Ω0 = 16, γ = 9.37 is the bare SOC strength without modulation. (a) Plot of the spin polarization |〈σz〉| and 〈σx〉 in the ground state. The blue and red lines are from the prediction of the Dicke Hamiltonian. The circles and squares are from the numerical simulation of the G-P equation (2). (b) Plot of the COM motion period T. The shift of the harmonic trap D = 1, T0 = 2π/ωy.
