量子超材料中相干驱动的拓扑跃迁
Coherence-Driven Topological Transition in Quantum Metamaterials
摘要：
我们介绍并从理论上证明了一种量子超材料，该材料由致密的超冷中性原子装载到一种固有的无缺陷的人造光晶体中制成，不受传统固态平台中不可避免的众所周知的临界挑战的影响。我们展示了一个全光控制的超快时间尺度上的光子拓扑过渡的Isoprone轮廓从一个开放的封闭的拓扑结构，在相同的频率。这种原子晶格量子超材料使得能够动态操纵探测量子发射器的衰减速率超过一个数量级。这一提议可能导致实际上无损的，可调谐的和拓扑可重构的量子超材料，单光子或少光子级的应用，如量子传感，量子信息处理，和量子模拟使用超材料。
英文摘要：
We introduce and theoretically demonstrate a quantum metamaterial made of dense ultracold neutral atoms loaded into an inherently defect-free artificial crystal of light, immune to well-known critical chal- lenges inevitable in conventional solid-state platforms. We demonstrate an all-optical control on ultrafast time scales over the photonic topological transition of the isofrequency contour from an open to close topology at the same frequency. This atomic lattice quantum metamaterial enables a dynamic manipula- tion of the decay rate of a probe quantum emitter by more than an order of magnitude. This proposal may lead to practically lossless, tunable and topologically-reconfigurable quantum metamaterials, for single- or few-photon-level applications as varied as quantum sensing, quantum information processing, and quantum simulations using metamaterials.
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