Journal
PHYSICAL REVIEW E
Volume 92, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.92.062909
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Funding
- FPU Ph.D. Programme (Spain)
- FPU program of short stays
- Xunta de Galicia [EM2013/002]
- FCT (Portugal) [UID/FIS/00618/2013, PTDC/FIS-OPT/1918/2012]
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We analyze a system of three two-dimensional nonlinear Schrodinger equations coupled by linear terms and with the cubic-quintic (focusing-defocusing) nonlinearity. We consider two versions of the model: conservative and parity-time (PT) symmetric. These models describe triple-core nonlinear optical waveguides, with balanced gain and losses in the PT-symmetric case. We obtain families of soliton solutions and discuss their stability. The latter study is performed using a linear stability analysis and checked with direct numerical simulations of the evolutional system of equations. Stable solitons are found in the conservative and PT-symmetric cases. Interactions and collisions between the conservative and PT-symmetric solitons are briefly investigated, as well.
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