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arxiv: 1108.2405 · v1 · pith:6X3P7WCFnew · submitted 2011-08-11 · ⚛️ physics.optics · cond-mat.quant-gas· nlin.PS

Algebraic bright and vortex solitons in defocusing media

classification ⚛️ physics.optics cond-mat.quant-gasnlin.PS
keywords solitonsnonlinearitybrightdefocusingfundamentalgrowthratestable
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We demonstrate that spatially inhomogeneous defocusing nonlinear landscapes with the nonlinearity coefficient growing toward the periphery as [1+abs(r)]**a support one- and two-dimensional fundamental and higher-order bright solitons, as well as vortex solitons, with algebraically decaying tails. The energy flow of the solitons converges as long as nonlinearity growth rate exceeds the dimensionality, i.e., a>D. Fundamental solitons are always stable, while multipoles and vortices are stable if the nonlinearity growth rate is large enough.

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