Sim Gisung, Kim Heewoo, Moon Han Seb
Department of Physics, Pusan National University, Geumjeong-Gu, Busan, 46241, South Korea.
Quantum Sensors Research Center, Pusan National University, Geumjeong-Gu, Busan, 46241, South Korea.
Sci Rep. 2025 Mar 5;15(1):7727. doi: 10.1038/s41598-025-86479-w.
Squeezed states of light, generated through four-wave mixing (FWM), are increasingly recognized as valuable resources for various applications in quantum sensing, quantum imaging, and quantum information processing. In this study, we report achieving more than - 7.8 dB of intensity-difference squeezing (IDS) in two-mode squeezed states from hot Rb vapor and - 5.0 dB from hot Rb vapor, utilizing a fiber electro-optic modulator (EOM) within a single home-made diode laser system. By mitigating the effects of undesired multimode from the EOM on the squeezing, we experimentally demonstrated the IDS of Rb and Rb atoms within a single experimental setup, benefiting from the EOM's ability to provide higher frequency shifts. This advancement may expand the scope of applications for hot atomic-vapor-based quantum technologies, leveraging the capabilities of the EOM.
通过四波混频（FWM）产生的压缩光态，越来越被认为是量子传感、量子成像和量子信息处理等各种应用中的宝贵资源。在本研究中，我们报告了在一个自制的单二极管激光系统中，利用光纤电光调制器（EOM），在热铷蒸汽的双模压缩态中实现了超过-7.8 dB的强度差压缩（IDS），以及在热铷蒸汽中实现了-5.0 dB的强度差压缩。通过减轻EOM产生的不需要的多模对压缩的影响，我们在单个实验装置中通过实验证明了铷和铷原子的IDS，这得益于EOM提供更高频率偏移的能力。这一进展可能会扩大基于热原子蒸汽的量子技术的应用范围，利用EOM的能力。
