Topologically protected states are important in realizing robust excitation transfer between distant sites in photonic lattices. Here, we propose an efficient gap-protected transfer of photons in a scalable one-dimensional waveguide array by transporting the topological defect state of a Su–Schrieffer–Heeger model. The separation between neighboring waveguides is designed according to the Jaynes–Cummings model. As a result, the zero-energy eigenstate is topologically protected from the extended states by a constant energy gap, which leads to a fast and robust excitation transfer. We also show that the transport can be further sped up by the quasi-periodic oscillation induced by the non-adiabatic effect. This scheme has potential applications in scalable quantum information processing.

中文翻译：

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缝隙保护的光子晶格中拓扑缺陷状态的转移

拓扑保护状态对于实现光子晶格中远处之间的鲁棒激发转移非常重要。在这里，我们通过传输Su–Schrieffer–Heeger模型的拓扑缺陷状态，提出了可伸缩的一维波导阵列中光子的有效间隙保护转移。相邻波导之间的间距是根据Jaynes-Cummings模型设计的。结果，零能量本征态通过恒定的能隙在拓扑上免受扩展态的影响，这导致了快速而稳健的激发传递。我们还表明，由非绝热效应引起的准周期振荡可以进一步加快传输速度。该方案在可伸缩量子信息处理中具有潜在的应用。