Nonlinear Parity-Time (PT) symmetric closed-form optical quadrimer   waveguides: Attractor perspective
  We report a study on a closed-form nonlinear parity-time symmetric optical quadrimer waveguides system with a specific coupling scheme. The system yields power saturation behavior in the modes, which may be attributed to the inherent attractor in the system. A detailed analysis has been provided to confirm the attractor aspect of the system. This work also addresses a crucial issue regarding choice of initial conditions while carrying out numerical simulation for such systems. 
Samit Kumar Gupta, Jyoti Prasad Deka, Amarendra K. Sarma
physics.optics