Boson sampling with 20 input photons in 60-mode interferometer at 1014-dimensional Hilbert space
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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%.
Wang , H , Qin , J , Ding , X , Chen , M-C , Chen , S , You , X , He , Y-M , Jiang , X , You , L , Wang , Z , Schneider , C , Renema , J J , Hoefling , S , Lu , C-Y & Pan , J-W 2019 , ' Boson sampling with 20 input photons in 60-mode interferometer at 10 14 -dimensional Hilbert space ' , Physical Review Letters , vol. 123 , no. 15 , 250503 . https://doi.org/10.1103/PhysRevLett.123.250503
Physical Review Letters
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