$\mathcal{P}\mathcal{T}$ phase control in circular multicore fibers

Abstract

We consider light dynamics in a circular multicore fiber with balanced gain and loss core distribution, and show that transition from unbroken to broken $\mathcal{P}\mathcal{T}$ phases can be conveniently controlled by geometric twist of the fiber. The twist introduces Peierls' phases in the coupling constants and thus acts as an artificial gauge field. As an application, we discuss twist-induced tuning of optical transmission in a six-core fiber with one lossy core.

6 pages, 4 figures; to appear in Optics Letters

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Cited by in corpus (13)

• Vortex solitons in twisted circular waveguide arrays
• PT-symmetry in nonlinear twisted multi-core fibers
• Observation of twist-induced geometric phases and inhibition of optical tunneling via Aharonov-Bohm effects
• Light dynamics in nonlinear trimers and twisted multicore fibers
• Floquet control of global $PT$ symmetry in 2D arrays of quadrimer waveguides
• Quantum decay and amplification in a non-Hermitian unstable continuum
• Gyrating solitons in a necklace of optical waveguides
• Necklaces of $\mathcal{P}\mathcal{T}$-symmetric dimers
• Modulation Instability of Discrete Angular Momentum in Coupled Fiber Rings
• Standing Wave Solutions in Twisted Multicore Fibers
• Target decoupling in a coupled optical system resistant to random perturbation
• Two-way enhancement of sensitivity by tailoring higher-order exceptional points
• Vortex ring beams in nonlinear $\mathcal{P}\mathcal{T}$-symmetric systems