Stability of vortex solitons in thermal nonlinear media with cylindrical symmetry.
We analyze the salient features of vortex-ring solitons supported by cylindrically symmetric media with nonlocal thermal nonlinearity. We discover the existence of a maximum allowed topological charge for such vortex solitons to be stable on propagation: Only vortex-ring solitons with topological charge m </= 2 are found to be stable. This remarkable result holds independently of the radius of the sample.
Kartashov
Yaroslav V
YV
Vysloukh
Victor A
VA
Torner
Lluis
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