Generation of squeezed vacuum state in the millihertz frequency band  

作　　者：Li Gao Li-ang Zheng Bo Lu Shaoping Shi Long Tian Yaohui Zheng 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Light(Science & Applications)》2024年第12期3109-3116,共8页光(科学与应用)(英文版)

基　　金：sponsored by National Natural Science Foundation of China(NSFC)(Nos.62225504,62027821,U22A6003,62035015,12174234,12304399);National Key R&D Program of China(Grant No.2020YFC2200402);Fundamental Research Program of Shanxi Province(No.202303021212003,202303021224006).

摘　　要：The detection of gravitational waves has ushered in a new era of observing the universe.Quantum resource advantages offer significant enhancements to the sensitivity of gravitational wave observatories.While squeezed states for ground-based gravitational wave detection have received marked attention,the generation of squeezed states suitable for mid-to-low-frequency detection has remained unexplored.To address the gap in squeezed state optical fields at ultra-low frequencies,we report on the first direct observation of a squeezed vacuum field until Fourier frequency of 4 millihertz with the quantum noise reduction of up to 8.0 dB,by the employment of a multiple noise suppression scheme.Our work provides quantum resources for future gravitational wave observatories,facilitating the development of quantum precision measurement.

关 键 词：SQUEEZED VACUUM QUANTUM 

分 类 号：O41[理学—理论物理]