Fig. 1

The bell-shapes plots of \({{\left| {{p}_{1}}(x,t) \right| }^{2}}\), where \(a_{1} = 0.4,a_{2} = 0.5,b_{1} = c_{1} = y = w = 0.3,\) \(c_{2} = c_{3} = 2,b_{2} = c_{4} = 1,c_{5} = 0.2,s = - 0.2,\)\(u = n_{1} = \rho = 0.1,K = 2\) and \(\tau =1\).