Ultralow-loss Si3N4 PICs generate path-encoded EPR pairs (F=0.9875) and fuse them into four-photon GHZ states at F=0.943(8) and 27 Hz—two orders of magnitude above prior silicon-photonic rates.
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Amorphous silicon metasurfaces enable photo-thermally tunable photon-pair generation through SFWM, achieving rates above 3.8 kHz with high purity and deviations from quadratic power scaling due to heating-induced resonance shifts.
A prototype photonic ring resonator device was characterized in the upper H-band, with a quadratic model for suppressed-wavelength progression found to be more consistent with data than a linear model, though depth and FWHM trends remain unresolved.
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An ultralow-loss integrated photonic platform for discrete-variable quantum information processing
Ultralow-loss Si3N4 PICs generate path-encoded EPR pairs (F=0.9875) and fuse them into four-photon GHZ states at F=0.943(8) and 27 Hz—two orders of magnitude above prior silicon-photonic rates.