Boson Sampling with Single-Photon Fock States from a Bright Solid-State Source

作者：Loredo J C; Broome M A; Hilaire P; Gazzano O; Sagnes I; Lemaitre A; Almeida M P; Senellart P; White A G

来源：Physical Review Letters, 2017, 118(13): 130503.

DOI：10.1103/PhysRevLett.118.130503

A boson-sampling device is a quantum machine expected to perform tasks intractable for a classical computer, yet requiring minimal nonclassical resources as compared to full-scale quantum computers. Photonic implementations to date employed sources based on inefficient processes that only simulate heralded single-photon statistics when strongly reducing emission probabilities. Boson sampling with only single-photon input has thus never been realized. Here, we report on a boson-sampling device operated with a bright solid-state source of single-photon Fock states with high photon-number purity: the emission from an efficient and deterministic quantum dot-micropillar system is demultiplexed into three partially indistinguishable single photons, with a single-photon purity 1 - g((2))(0) of 0.990 +/- 0.001, interfering in a linear optics network. Our demultiplexed source is between 1 and 2 orders of magnitude more efficient than current heralded multiphoton sources based on spontaneous parametric down-conversion, allowing us to complete the boson-sampling experiment faster than previous equivalent implementations.

• 出版日期2017-3-28