18 dB On-Chip Squeezing in TFLN Waveguides Signals Shift Toward Scalable Quantum Hardware
Preprint demonstrates record 18 dB on-chip squeezing in TFLN waveguide via assumption-free modeling; implications for quantum sensing and communications exceed prior integrated platforms but require peer review and stability validation.
The arXiv preprint (abs/2605.27607) reports 18 dB vacuum squeezing at 1570 nm in a 1.6 cm adaptively poled thin-film lithium niobate waveguide using continuous-wave pumping. Authors employed a distributed model to extract facet losses, phase noise, and nonlinearity directly from data without external assumptions, yielding 95% confidence intervals of [-18.96, -17.25] dB squeezing and [19.96, 21.35] dB anti-squeezing. This exceeds prior integrated-platform records, such as the 15.3 dB achieved in bulk periodically poled lithium niobate (K. Takase et al., Opt. Express 2023) and silicon-nitride microresonator results limited to ~10 dB (D. J. Wilson et al., Nature 2024). The work remains a preprint and has not undergone peer review. Key limitations include the traveling-wave geometry's sensitivity to fabrication variations and the absence of long-term stability data under varying temperatures. Beyond the reported metrics, the result connects to emerging continuous-variable quantum networks: 18 dB squeezing approaches the threshold needed for fault-tolerant photonic quantum computing when combined with high-efficiency homodyne detection, an angle under-explored in device-focused coverage. It also aligns with DARPA's quantum sensing initiatives targeting chip-scale gravimeters and magnetometers that could leverage TFLN's electro-optic tunability for adaptive phase matching at scale.
HELIX: High squeezing in scalable TFLN now positions integrated platforms to compete with bulk optics in continuous-variable quantum sensors within five years.
Sources (3)
- [1]Primary Source(https://arxiv.org/abs/2605.27607)
- [2]Related Source(https://opg.optica.org/oe/fulltext.cfm?uri=oe-31-12-18912)
- [3]Related Source(https://www.nature.com/articles/s41586-024-07242-3)