Computational Complexity of Bosons in Linear Networks
Andrew G. White · 2017
Abstract : This project is the first to operating a BOSONSAMPLING device with a bright source of highly-pure single-photon Fock states, using a new kind ofsolid-state multiphoton source. In detail, the source is emission from an efficient and deterministic quantum dot-micropillar system,demultiplexed into three partially-indistinguishable single-photons, with purity 1g(2)(0) of 0.9900.001 (close to the ideal value of unity),interfering in a 66 linear optics network. Our source is quietlacking higher-order photon terms that introduce noiseallowing the directexploration of the effect of partial distinguishability in the complexity class of the resulting sampling distribution. Our demultiplexed source isbetween one and two orders-of-magnitude more efficient than current heralded multiphoton sources based on spontaneous parametricdownconversion, allowing us to complete the BOSONSAMPLING experiment far faster than previous equivalent implementations. This intrinsicsource superiority places BOSONSAMPLING with larger photon numbers within near reach.