The realization of robust coherent energy transfer with a long range from a donor to an acceptor has many important applications in the field of quantum optics. However, it is hard to be realized using conventional schemes. Here, we demonstrate theoretically that robust energy transfer can be achieved using a photonic crystal platform, which includes the topologically protected edge state and zero-dimensional topological corner cavities. When the donor and the acceptor are put into a pair of separated topological cavities, the energy transfer between them can be fulfilled with the assistance of the topologically protected interface state. Such an energy transfer is robust against various kinds of defects, and can also occur over very long distances, which is very beneficial for biological detections, sensors, quantum information science, and so on.

中文翻译：

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拓扑保护的远程相干能量转移

实现从施主到受主的长距离稳健相干能量转移在量子光学领域具有许多重要应用。然而，使用传统方案很难实现。在这里，我们从理论上证明了使用光子晶体平台可以实现稳健的能量转移，该平台包括拓扑保护边缘状态和零维拓扑角腔。当供体和受体被放入一对分离的拓扑腔中时，它们之间的能量转移可以在拓扑保护界面态的帮助下完成。这种能量转移对各种缺陷具有鲁棒性，也可以发生在很长的距离内，这对生物检测、传感器、量子信息科学等非常有益。