Topological states in partially-PT-symmetric azimuthal potentials
10.1103/PhysRevLett.115.193902
Inclou dades d'ús des de 2022
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hdl:2117/82161
Tipus de documentArticle
Data publicació2015-11-04
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Abstract
We introduce partially-parity-time (pPT)-symmetric azimuthal potentials composed from individual PT-symmetric cells located on a ring, where two azimuthal directions are nonequivalent in a sense that in such potential excitations carrying topological dislocations exhibit different dynamics for different directions of energy circulation in the initial field distribution. Such nonconservative ratchetlike structures support rich families of stable vortex solitons in cubic nonlinear media, whose properties depend on the sign of the topological charge due to the nonequivalence of azimuthal directions. In contrast, oppositely charged vortex solitons remain equivalent in similar fully-PT-symmetric potentials. The vortex solitons in the pPT- and PT-symmetric potentials are shown to feature qualitatively different internal current distributions, which are described by different discrete rotation symmetries of the intensity profiles.
CitacióKartashov, Y.V., Konotop, V., Torner, L. Topological states in partially-PT-symmetric azimuthal potentials. "Physical review letters", 04 Novembre 2015, vol. 115, núm. 19.
ISSN1079-7114
Versió de l'editorhttp://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.193902
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