Enhanced metrology at the critical point of a many-body Rydberg atomic system
Enhanced metrology at the critical point of a many-body Rydberg atomic system
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DOI：
10.1038/s41567-022-01777-8
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发表时间：
2022-07
期刊：
影响因子：
19.6
通讯作者：
D. Ding;Zongkai Liu;B. Shi;Guangtao Guo;K. Mølmer;C. Adams
中科院分区：
文献类型：
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作者：
D. Ding;Zongkai Liu;B. Shi;Guangtao Guo;K. Mølmer;C. Adams
相互作用的多体系统由于发散的量子涨落而在临界转变点附近显示出增强的灵敏度。这种基于临界的增强已被建议作为精密计量应用的潜在资源。在这里，我们展示了多体临界增强计量外部微波电场的非平衡里德堡原子气体的传感。我们表明，外部驱动的小的变化导致一个大的变化，人口的里德堡态周围的临界和一个显着的变化，在光传输信号。对于连续光传输的临界点，我们量化的增强灵敏度提取的Fisher信息，这表明了三个数量级的增加，由于多体效应相比，单粒子系统。这些结果表明，多体系统的临界特性是传感和计量应用的有前途的资源。
Interacting many-body systems display enhanced sensitivity close to critical transition points due to diverging quantum fluctuations. This criticality-based enhancement has been suggested as a potential resource for applications in precision metrology. Here we demonstrate many-body critical enhanced metrology for the sensing of external microwave electric fields in a non-equilibrium Rydberg atomic gas. We show that small variations in external driving lead to a large variation in the population of Rydberg states around criticality and to a notable change in the optical transmission signal. For continuous optical transmission at the critical point, we quantify the enhanced sensitivity extracting the Fisher information, which shows a three orders of magnitude increase due to many-body effects compared with single-particle systems. These results demonstrate that critical properties of many-body systems are promising resources for sensing and metrology applications.