空芯光子晶体光纤中的里德伯原子
Rydberg atoms in hollow-core photonic crystal fibres
摘要：
高激发态里德伯原子（比基态原子高六个数量级）的极大极化率使其在量子光学、量子计算、量子模拟和计量学等领域引起了极大的兴趣。然而，如果它们要在应用中常规使用，则主要要求是将它们集成到技术上可行的集成设备中。在这里，我们表明，里德伯介质的基础上，室温铯蒸气可以限制在宽带引导的kagome式空芯光子晶体光纤。在填充铯的光纤上进行的三光子光谱检测到里德堡态，其主量子数为n = 40。除了小的能级位移，我们观察到窄线确认的里德堡激发的相干性。使用不同的里德伯态和芯直径，我们研究了不同曝光时间后光纤芯内的约束的影响。了解这些影响是必不可少的成功的未来发展的新的应用程序的基础上集成室温里德伯系统。
英文摘要：
The exceptionally large polarisability of highly excited Rydberg atoms (six orders of magnitude higher than ground-state atoms) makes them of great interest in fields such as quantum optics, quantum computing, quantum simulation and metrology. If however they are to be used routinely in applications, a major requirement is their integration into technically feasible, miniaturised devices. Here we show that a Rydberg medium based on room temperature caesium vapour can be confined in broadband-guiding kagome-style hollow-core photonic crystal fibres. Three-photon spectroscopy performed on a caesium-filled fibre detects Rydberg states up to a principal quantum number of n = 40. Besides small energy level shifts we observe narrow lines confirming the coherence of the Rydberg excitation. Using different Rydberg states and core diameters we study the influence of confinement within the fibre core after different exposure times. Understanding these effects is essential for the successful future development of novel applications based on integrated room temperature Rydberg systems.
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