Soliton beam dynamics in parity-time symmetric nonlinear coupler

摘要

This work analyzes the propagation of soliton beam in (1+1) D dimensional Parity-Time (PT) symmetric linear and nonlinear coupled systems. The beam dynamics in the coupled systems has been studied variationally and numerically. The beam propagation is stable when the gain/loss coefficient is less than or equal to the coupling constant. Above the phase transition point, the eigen modes become complex, which result in unstable beam propagation. The stability of the solution against small perturbation has been analyzed using linear stability analysis.