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• W1997584104 abstract "We demonstrate that two-dimensional two-component bright solitons of an annular shape, carrying vorticities $(m,ifmmodepmelsetextpmfi{}m)$ in the components, may be stable in media with the cubic-quintic nonlinearity, including the hidden-vorticity (HV) solitons of the type $(m,ensuremath{-}m)$, whose net vorticity is zero. Stability regions for the vortices of both $(m,ifmmodepmelsetextpmfi{}m)$ types are identified for $m=1$, 2, and 3, by dint of the calculation of stability eigenvalues, and in direct simulations. In addition to the well-known symmetry-breaking (external) instability, which splits the ring soliton into a set of fragments flying away in tangential directions, we report two new scenarios of the development of weak instabilities specific to the HV solitons. One features charge flipping, with the two components exchanging angular momentum and periodically reversing the sign of their spins. The composite soliton does not directly split in this case; therefore, we identify such instability as an intrinsic one. Eventually, the soliton splits, as weak radiation loss drives it across the border of the ordinary strong (external) instability. Another scenario proceeds through separation of the vortex cores in the two components, each individual core moving toward the outer edge of the annular soliton. After expulsion of the cores, there remains a zero-vorticity breather with persistent internal vibrations." @default.
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• W1997584104 date "2005-02-28" @default.
• W1997584104 modified "2023-09-27" @default.
• W1997584104 title "Two-dimensional solitons with hidden and explicit vorticity in bimodal cubic-quintic media" @default.
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• W1997584104 doi "https://doi.org/10.1103/physreve.71.026615" @default.
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