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<p>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 <sup>85</sup>Rb vapor and − 5.0 dB from hot <sup>87</sup>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 <sup>85</sup>Rb and <sup>87</sup>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.</p>

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Intensity-difference squeezing from four-wave mixing in hot 85Rb and 87Rb atoms in single diode laser pumping system

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月5日

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  • Gisung Sim,
  • Heewoo Kim,
  • Han Seb Moon

摘要

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 85Rb vapor and − 5.0 dB from hot 87Rb 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 85Rb and 87Rb 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.