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

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.