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000627009 005__ 20251218212311.0
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000627009 0247_ $$2arXiv$$aarXiv:2502.17337
000627009 0247_ $$2datacite_doi$$a10.3204/PUBDB-2025-01534
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000627009 088__ $$2arXiv$$aarXiv:2502.17337
000627009 1001_ $$0P:(DE-H253)PIP1101456$$aUlanov, Alexander$$b0$$eCorresponding author$$udesy
000627009 245__ $$aQuadrature squeezing in a nanophotonic microresonator
000627009 260__ $$c2025
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000627009 500__ $$a9 pages, 3 figures
000627009 520__ $$aSqueezed states of light are essential for emerging quantum technology in metrology and information processing. Chip-integrated photonics offers a route to scalable and efficient squeezed light generation, however, parasitic nonlinear processes and optical losses remain significant challenges. Here, we demonstrate single-mode quadrature squeezing in a photonic crystal microresonator via degenerate dual-pump spontaneous four-wave mixing. Implemented in a scalable, low-loss silicon-nitride photonic-chip platform, the microresonator features a tailored nano-corrugation that modifies its resonances to suppress parasitic nonlinear processes. In this way, we achieve an estimated 7.8 dB of on-chip squeezing in the bus waveguide, with potential for further improvement. These results open a promising pathway toward integrated squeezed light sources for quantum-enhanced interferometry, Gaussian boson sampling, coherent Ising machines, and universal quantum computing.
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000627009 536__ $$0G:(EU-Grant)853564$$aSTARCHIP - Microphotonics-based frequency combs for habitable exoplanet detection (853564)$$c853564$$fERC-2019-STG$$x1
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000627009 7001_ $$0P:(DE-H253)PIP1094526$$aRuhnke, Bastian$$b1$$udesy
000627009 7001_ $$0P:(DE-H253)PIP1094154$$aWildi, Thibault$$b2$$udesy
000627009 7001_ $$0P:(DE-H253)PIP1092814$$aHerr, Tobias$$b3$$eCorresponding author$$udesy
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000627009 9141_ $$y2025
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