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We demonstrate deterministic and robust generation of pulsed resonancefluorescence single photons from a single InGaAs quantum dot using the methodof rapid adiabatic passage. Comparative study is performed withtransform-limited, negatively chirped and positively chirped pulses,identifying the last one to be the most robust against fluctuation of drivingstrength. The generated single photons are background free, have a vanishingtwo-photon emission probability of 0.3% and a raw (corrected) two-photonHong-Ou-Mandel interference visibility of 97.9% (99.5%), reaching a precisionthat places single photons at the threshold for fault-tolerant surface-codequantum computing. The single-photon source can be readily scaled up tomulti-photon entanglement and used for quantum metrology, boson sampling andlinear optical quantum computing.

Deterministic and Robust Generation of Single Photons On a Chip with 99.5% Indistinguishability Using Rapid Adiabatic Passage