Ann Byoung-Moo, Song Younghoon, Kim Junki, Yang Daeho, An Kyungwon
Department of Physics and Astronomy & Institute of Applied Physics, Seoul National University, Seoul, 08826, Korea.
Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
Sci Rep. 2019 Nov 19;9(1):17110. doi: 10.1038/s41598-019-53525-3.
Sub-Poisson field with much reduced fluctuations in a cavity can boost quantum precision measurements via cavity-enhanced light-matter interactions. Strong coupling between an atom and a cavity mode has been utilized to generate highly sub-Poisson fields. However, a macroscopic number of optical intracavity photons with more than 3 dB variance reduction has not been possible. Here, we report sub-Poisson field lasing in a microlaser operating with hundreds of atoms with well-regulated atom-cavity coupling and interaction time. Its photon-number variance was 4 dB below the standard quantum limit while the intracavity mean photon number scalable up to 600. The highly sub-Poisson photon statistics were not deteriorated by simultaneous interaction of a large number of atoms. Our finding suggests an effective pathway to widely scalable near-Fock-state lasing at the macroscopic scale.
腔内具有大幅降低波动的亚泊松场可通过腔增强光与物质相互作用来提升量子精密测量。原子与腔模之间的强耦合已被用于产生高度亚泊松场。然而，尚未实现方差降低超过3 dB的宏观数量的腔内光学光子。在此，我们报告了在一个微激光器中实现的亚泊松场激光发射，该微激光器与数百个原子一起工作，具有良好调控的原子 - 腔耦合和相互作用时间。其光子数方差比标准量子极限低4 dB，而腔内平均光子数可扩展至600。大量原子的同时相互作用并未使高度亚泊松光子统计特性变差。我们的发现为在宏观尺度上广泛可扩展的近福克态激光发射提供了一条有效途径。
