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- W2023125580 abstract "Complex Ginzburg-Landau (CGL) models of laser media (with cubic-quintic nonlinearity) do not contain an effective diffusion term, which makes all vortex solitons unstable in these models. Recently, it has been demonstrated that the addition of a two-dimensional periodic potential, which may be induced by a transverse grating in the laser cavity, to the CGL equation stabilizes compound (four-peak) vortices, but the most fundamental ``crater-shaped'' vortices (CSVs), alias vortex rings, which are essentially squeezed into a single cell of the potential, have not been found before in a stable form. In this work we report on families of stable compact CSVs with vorticity $S=1$ in the CGL model with the external potential of two different types: an axisymmetric parabolic trap and the periodic potential. In both cases, we identify a stability region for the CSVs and for the fundamental solitons ($S=0$). Those CSVs which are unstable in the axisymmetric potential break up into robust dipoles. All the vortices with $S=2$ are unstable, splitting into tripoles. Stability regions for the dipoles and tripoles are identified, too. The periodic potential cannot stabilize CSVs with $Sensuremath{geqslant}2$ either; instead, families of stable compact square-shaped quadrupoles are found." @default.
- W2023125580 created "2016-06-24" @default.
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- W2023125580 date "2010-08-23" @default.
- W2023125580 modified "2023-09-24" @default.
- W2023125580 title "Stable topological modes in two-dimensional Ginzburg-Landau models with trapping potentials" @default.
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- W2023125580 doi "https://doi.org/10.1103/physreva.82.023813" @default.
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