Figure 7 | Scientific Reports

Figure 7

From: Robust \({\bf{P}}{\bf{T}}\) symmetry of two-dimensional fundamental and vortex solitons supported by spatially modulated nonlinearity

Figure 7

Stability charts for vortex solitons with topological charge \(m=1\) in the model including the \({\mathscr{P}}{\mathscr{T}}\)-symmetric imaginary potential (3) with \(\beta =0\), and \(\sigma =0\) or 1 in Eq. (9), in panels (a and b) panels, respectively. Green circles and red crosses denote stable and unstable vortex solitons, respectively. The same notation is used below in other stability charts for vortex solitons.

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