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Wang, P., Meng, F.C., Zhang, Z.L., Wang, D.Z., Wang, S., Yao, E.T., Wang, L. and Ye, R.Q. (2022) A Bump Height Measurement Method Based on Optical Triangulation. Acta Photonica Sinica, 51, Article ID: 0512001. (In Chinese)
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TITLE:
Controlling Nonlinear Signal Amplification in Superconductors via Modulational Instability
AUTHORS:
Paldou Yaya Alexis, Essebe Eba David, Kamdem Tamwa Romuald, Kol Guy Richard
KEYWORDS:
Modulational Instability, Superconductors, Nonlinear Waves, Signal Dynamics, Complex Ginzburg-Landau Equation
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.14 No.9,
September
14,
2026
ABSTRACT: We investigate nonlinear signal propagation in superconducting media using the complete complex Ginzburg-Landau equation. A perturbative modulational instability framework is employed to derive analytical expressions for the dispersion relation and growth rate. The analysis reveals well-defined instability domains where small perturbations are exponentially amplified, giving rise to high-amplitude localized breather structures. Group velocity dispersion and phase self-modulation govern the transition between stable and unstable regimes. The growth rate exhibits maxima corresponding to optimal conditions for energy localization and signal amplification; outside these regions, the system supports stable, low-amplitude periodic waves. This analytical framework opens perspectives for the design of superconducting devices, photonic technologies, and advanced signal processing applications.