2019/10/22 by Hui Wang, Jian Qin, Xing Ding +11 · 1 citation
Physics and Astronomy · #quant-ph #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.1103/physrevlett.123.250503
published as Phys. Rev. Lett. 123, 250503 (2019) · 23 pages, 14 figures
arxiv created 2019/10/22 · arxiv updated 2019/12/25
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 1014 -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%.