Quantum Squeezing in an All-Resonant Periodically Poled Lithium Niobate Microresonator
Published in arXiv:2602.22693, 2026
Quantum noise limits the sensitivity of optical measurements, but squeezed states of light provide a powerful resource for quantum-enhanced sensing and information processing. In this work, we demonstrate a dual-resonant optical parametric amplifier based on a periodically poled thin-film lithium niobate microresonator. By combining high-quality-factor resonances, strong quasi-phase-matched χ(2) nonlinear interactions, and escape efficiencies exceeding 90%, we observe continuous-wave squeezing and infer an on-chip squeezing level of 7.5 dB. The generated squeezed-light spectrum spans more than 10 THz, highlighting the potential of integrated lithium niobate photonics for scalable continuous-variable quantum technologies.
Recommended citation: Xinyi Ren, Reshma Kopparapu, Tushar Sanjay Karnik, Chun-Ho Lee, Kiwon Kwon, Clayton Cheung, Yue Yu, Shi-Yuan Ma, Bo-Han Wu, et al. (2026). arXiv preprint arXiv:2602.22693.
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