Scalable Squeezed-Light Source for Continuous-Variable Quantum Sampling

We propose a squeezed-light source meeting the stringent requirements of continuous-variable quantum sampling. Using the time-dependent effective second-order nonlinear interaction induced by a strong driving beam in the presence of the χ3 response in a microresonator, our approach is compatible with established nanophotonic platforms. With typical realistic parameters, squeezed states with a mean photon number of 10 or higher can be generated in a single consistent temporal mode at repetition rates of over 100 MHz. Over 15 dB of squeezing is expected in existing ultralow-loss platforms.