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Wang, Hui; Qin, Jian; Ding, Xing; Chen, Ming-Cheng; Chen, Si; You, Xiang; He, Yu-Ming; Jiang, Xiao; You, L; Wang, Z; Schneider, C; Renema, Jelmer J; Höfling, Sven; Lu, Chao-Yang; Pan, Jian-Wei
Physical review letters, 12/2019, Letnik: 123, Številka: 25Journal Article
Quantum computing experiments are moving into a new realm of increasing size and complexity, with the short-term goal of demonstrating an advantage over classical computers. Boson sampling is a promising platform for such a goal; however, the number of detected single photons is up to five so far, limiting these small-scale implementations to a proof-of-principle stage. Here, we develop solid-state sources of highly efficient, pure, and indistinguishable single photons and 3D integration of ultralow-loss optical circuits. We perform experiments with 20 pure single photons fed into a 60-mode interferometer. In the output, we detect up to 14 photons and sample over Hilbert spaces with a size up to 3.7 × 1014, over 10 orders of magnitude larger than all previous experiments, which for the first time enters into a genuine sampling regime where it becomes impossible to exhaust all possible output combinations. The results are validated against distinguishable samplers and uniform samplers with a confidence level of 99.9%.
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in: SICRIS
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