Figure 4

Examples of stable single- and multi-peak \({\mathscr{P}}{\mathscr{T}}\)-symmetric solitons, found in the model based on Eqs (4) and (9), with \(\sigma =1\) and (a) \(\beta =0.5\), \({\gamma }_{0}\mathrm{=1}\), \(k=-\,1\); (b) \(\beta =0.5\), \({\gamma }_{0}=0.2\), \(k=-\,4\); (c) \(\beta =0.2\), \({\gamma }_{0}=1.4\), \(k=-\,2.8\); (d) \(\beta =0.5\), \({\gamma }_{0}=0.4\), \(k=-\,1.8\).