Figure 9

Direct numerical simulations for attractive second coupling. The global order parameter of traveling wave states as functions of λ. The parameters are \({{\rm{\Theta }}}_{2}=0\), \({\rm{\Delta }}=0.5\), and the values of \({{\rm{\Theta }}}_{1}\) are (a): \({{\rm{\Theta }}}_{1}=0.2\pi \); (b): \({{\rm{\Theta }}}_{1}=0.6\pi \); (c): \({{\rm{\Theta }}}_{1}=0.75\pi \); (d): \({{\rm{\Theta }}}_{1}=0.85\pi \). Black lines represent the self-consistent solution and red circles represent the direct simulation results.