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arXiv · 1910.09930

Boson sampling with 20 input photons in 60-mode interferometers at $10^{14}$ state spaces

Hui Wang·Jian Qin·Xing Ding·Ming-Cheng Chen·Si Chen·Xiang You·Yu-Ming He·Xiao Jiang·Z. Wang·L. You·J. J. Renema·Sven Hoefling·Chao-Yang Lu·Jian-Wei Pan
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Abstract

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 involved single photons was 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 ultra-low-loss optical circuits. We perform an experiment with 20 single photons fed into a 60-mode interferometer, and, in its output, sample over Hilbert spaces with a size of $10^{14}$ $-$over ten orders of magnitude larger than all previous experiments. The results are validated against distinguishable samplers and uniform samplers with a confidence level of 99.9%.

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Hui Wang, Jian Qin, Xing Ding, Ming-Cheng Chen, Si Chen, Xiang You, Yu-Ming He, Xiao Jiang, Z. Wang, L. You, J. J. Renema, Sven Hoefling, Chao-Yang Lu, Jian-Wei Pan. 2019-10-22. Boson sampling with 20 input photons in 60-mode interferometers at $10^{14}$ state spaces. https://doi.org/10.1103/physrevlett.123.250503

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