论文标题
在结构化真空中的物质波量子发射器的动力学
Dynamics of Matter-Wave Quantum Emitters in a Structured Vacuum
论文作者
论文摘要
通过真空的模式结构可以强烈修改自发发射的特征。在基于光子晶体的波导量子 - 电动力学中，该修饰被利用为带边缘附近的Atom-Photon相互作用，但是在实验中尚未探索与整个频段的物理学相互作用。在光学晶格中使用超电原子，我们研究了具有可调特性的有效光子晶体波导结构的单个带的物质波量子发射器的衰减动力学。根据真空耦合和带宽之间的比率，我们观察到从不可逆的衰减到完全振荡动力学的过渡，这些动力学与带边缘附近的物质波结合状态相互作用，我们的空间结构是我们表征的空间结构。我们的结果阐明了在可控环境中开放量子系统中连贯性的出现，并且与理解光子系统中真空诱导的衰减现象的了解相关。
The characteristics of spontaneous emission can be strongly modified by the mode structure of the vacuum. In waveguide quantum-electrodynamics based on photonic crystals, this modification is exploited to engineer atom-photon interactions near a band edge, but the physics of coupling to an entire band has not yet been explored in experiments. Using ultracold atoms in an optical lattice, we study the decay dynamics of matter-wave quantum emitters coupled to a single band of an effective photonic crystal waveguide structure with tunable characteristics. Depending on the ratio between vacuum coupling and bandwidth, we observe a transition from irreversible decay to fully oscillatory dynamics linked to the interplay of matter-wave bound states near the band edges, whose spatial structure we characterize. Our results shed light on the emergence of coherence in an open quantum system in a controllable environment, and are of relevance for the understanding of vacuum-induced decay phenomena in photonic systems.
