论文标题
由PT对称相转变控制的Hermitian非线性波混合
Hermitian Nonlinear Wave Mixing Controlled by a PT-Symmetric Phase Transition
论文作者
论文摘要
虽然通常通过与更大的环境的不连贯耦合来构建非热系统，但最近的作品表明，在某些条件下，相干耦合可用于类似效果。我们表明，这种新的范式使与非热子系统的PT-对称阶段相关的行为可以通过相干耦合控制包含的Hermitian系统。这是在参数非线性波混合中实现的，其中同时第二次谐波代替了损失的作用，从而诱导非武术行为，这些行为通过在Hermitian系统内的全部功率交换而存在。这些发现提出了一种新的方法，即动态工程，其中能量恢复和可持续性至关重要，这对于光子学和激光科学可能具有重要意义。
While non-Hermitian systems are normally constructed through incoherent coupling to a larger environment, recent works have shown that under certain conditions coherent couplings can be used to similar effect. We show that this new paradigm enables the behavior associated with the PT- symmetric phase of a non-Hermitian subsystem to control the containing Hermitian system through the coherent couplings. This is achieved in parametric nonlinear wave mixing where simultaneous second harmonic generation replaces the role of loss to induce non-Hermitian behavior that persists through a full exchange of power within the Hermitian system. These findings suggest a new approach for the engineering of dynamics where energy recovery and sustainability are of importance that could be of significance for photonics and laser science.
