title: Deterministic and robust generation of single photons from a single quantum dot with 99.5% indistinguishability using adiabatic rapid passage.
abstract: Single photons are attractive candidates of quantum bits (qubits) for quantum computation and are the best messengers in quantum networks. Future scalable, fault-tolerant photonic quantum technologies demand both stringently high levels of photon indistinguishability and generation efficiency. Here, we demonstrate deterministic and robust generation of pulsed resonance fluorescence single photons from a single semiconductor quantum dot using adiabatic rapid passage, a method robust against fluctuation of driving pulse area and dipole moments of solid-state emitters. The emitted photons are background-free, have a vanishing two-photon emission probability of 0.3% and a raw (corrected) two-photon Hong-Ou-Mandel interference visibility of 97.9% (99.5%), reaching a precision that places single photons at the threshold for fault-tolerant surface-code quantum computing. This single-photon source can be readily scaled up to multiphoton entanglement and used for quantum metrology, boson sampling, and linear optical quantum computing.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, & Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Yu-Jia
authors.initials: YJ
authors.lastname: Wei
authors.forename: Yu-Ming
authors.initials: YM
authors.lastname: He
authors.forename: Ming-Cheng
authors.initials: MC
authors.lastname: Chen
authors.forename: Yi-Nan
authors.initials: YN
authors.lastname: Hu
authors.forename: Yu
authors.initials: Y
authors.lastname: He
authors.forename: Dian
authors.initials: D
authors.lastname: Wu
authors.forename: Christian
authors.initials: C
authors.lastname: Schneider
authors.forename: Martin
authors.initials: M
authors.lastname: Kamp
authors.forename: Sven
authors.initials: S
authors.lastname: Höfling
authors.forename: Chao-Yang
authors.initials: CY
authors.lastname: Lu
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Pan
keywords: adiabatic rapid passage; quantum computation; quantum dots; resonance fluorescence; single photons; two-photon interference