We report quantum-enhanced second harmonic generation driven by parametric down-conversion, with efficiencies surpassing those of classical light beyond the photon-pair regime. Experiments confirm a persistent quantum advantage up to ~10 photons per mode, extending nonlinear quantum enhancement toward practical applications.
Enhanced Entangled Second Harmonic Generation Beyond the Photon Pairs Regime
T. Dickinson;O. Jedrkiewicz;M. ClericiPenultimo
;L. Caspani
Ultimo
2025-01-01
Abstract
We report quantum-enhanced second harmonic generation driven by parametric down-conversion, with efficiencies surpassing those of classical light beyond the photon-pair regime. Experiments confirm a persistent quantum advantage up to ~10 photons per mode, extending nonlinear quantum enhancement toward practical applications.
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