The existence and stability of nonlinear stationary states in nonlinear saturable coupler with balanced gain–loss (the parity-time symmetric distribution) are studied. Propagation and switching of beams at the different initial excitations are investigated.

中文翻译：

---

非线性饱和PT对称耦合器的动力学和非线性模式

研究了具有平衡增益损失（奇偶时间对称分布）的非线性饱和耦合器中非线性稳态的存在性和稳定性。研究了在不同初始激发下光束的传播和切换。