论文标题
在多体rydberg原子系统的临界点增强计量
Enhanced metrology at the critical point of a many-body Rydberg atomic system
论文作者
论文摘要
相互作用的多体系统的光谱特性可能显示出关键特征，并且具有精度计量学中的潜在应用。在这里，我们证明了非平衡rydberg原子气中的微波炉（MW）电场的多体增强的计量学。接近临界点，Rydberg原子对外部MW电场的高灵敏度，再加上多体化的增强性会引起光学传输的显着变化。我们使用Fisher信息量化了这种行为。对于临界点处的连续光传输，Fisher信息比独立粒子系统大三个数量级，测量的数据提供了49 NV/CM/$ \ TEXTRM {Hz}^{1/2} $的等效灵敏度。报告的结果构成了在精度计量学中应用多体效应的一个里程碑。
The spectral properties of an interacting many-body system may display critical character and have potential applications in precision metrology. Here, we demonstrate such many-body enhanced metrology for microwave (MW) electric fields in a non-equilibrium Rydberg atomic gas. Near criticality the high sensitivity of Rydberg atoms to external MW electric fields, combined with many-body enhancement induces significant changes in the optical transmission. We quantify this behavior using the Fisher information. For continuous optical transmission at the critical point, the Fisher information is three orders of magnitude larger than in independent particle systems, the measured data provides an equivalent sensitivity of 49 nV/cm/$\textrm{Hz}^{1/2}$. The reported results constitute a milestone towards the application of many-body effects in precision metrology.
