https://doi.org/10.1140/epjp/s13360-025-06075-9
Regular Article
Quasi-periodic breathers in a system of three coupled PT-symmetric nonlinear waveguides
Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentiev aven., 630090, Novosibirsk, Russia
Received:
23
September
2024
Accepted:
2
February
2025
Published online:
26
February
2025
A PT-symmetric model of three unidirectional coupled waveguides with Kerr-type nonlinearity and balanced gain and loss in edge waveguides is considered. During evolution, quasi-periodic breathers of two types with zero background may form in such a system. The modulation period for temporary breather oscillations strongly depends on the initial parameters of the incident wave. One type of breathers can interact quasi-elastically with each other, acquiring small changes in the amplitudes and velocities of incoming waves after a collision. The model can be useful in creating purely optical processing devices, for example, as an analog-to-digital converter.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
