二极管-反二极管双链中对称性破缺与恢复波传输
Symmetry breaking and restoring wave transmission in diode-antidiode double chains
摘要：
我们引入了两个平行耦合的离散非线性薛定谔（DNLS）非均匀链系统。每一个有利于单向传输的入射数据包，在相反的方向相对于彼此。两种不同的配置的二极管-反二极管对被认为是，一个梯子和一个plaquette。它们分别具有均匀横向线性耦合或仅限于系统中心非线性段的耦合。在弱线性耦合的情况下，观察到对称性破缺（即，该对仍然具有二极管特性），而中等强度的耦合恢复了对称性，使得传输有效地双向。在梯子的情况下，振荡的传输耦合的强度上的依赖性进行观察和定性解释。
英文摘要：
We introduce a system of two parallel-coupled discrete nonlinear Schroedinger (DNLS) inhomogeneous chains. Each one favors the unidirectional transmission of incident packets, in the opposite directions with respect to each other. Two different configurations of the diode-antidiode pair are considered, a ladder and a plaquette. They feature, respectively, the uniform transverse linear coupling, or the coupling limited to the central nonlinear segment of the system. In the case of weak linear coupling, the symmetry breaking is observed (i.e., the pair still features the diode behavior), while the moderately strong coupling restores the symmetry, making the transmission effectively bidirectional. In the case of the ladder, an oscillatory dependence of the transmission on the strength of the coupling is observed and qualitatively explained.
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