Tight-binding reproduces spatial intensity distributions but fails to capture complex oscillatory phase dynamics when benchmarked against exact z-dependent SUSY solutions in longitudinally modulated PT-symmetric waveguides.
Longhi, Quantum-optical analogies using photonic structures, Laser Photonics Rev.3, 243 (2009)
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Exact versus tight-binding models in longitudinally modulated $\mathcal{PT}$-symmetric coupled waveguides
Tight-binding reproduces spatial intensity distributions but fails to capture complex oscillatory phase dynamics when benchmarked against exact z-dependent SUSY solutions in longitudinally modulated PT-symmetric waveguides.