Figure 18

The blowup of an unstable vortex soliton with \(m=2\) and \({\gamma }_{0}=1.2\), \(\beta =0.5\), \(\sigma =1\), \(k=-\,2.4\), in the model with imaginary potential (4). Panels display the field at \(z=60\) (a), \(z=200\) (b) and \(z=300\) (c). Note the difference in vertical scales between them.