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

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%.

23 pages, 14 figures

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Cited by in corpus (8)

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• Efficient generation of multipartite W state via quantum eraser
• Multiplexed Single Photons from Deterministically Positioned Nanowire Quantum Dots
• Many-body interference in bosonic dynamics
• Benchmarking 50-Photon Gaussian Boson Sampling on the Sunway TaihuLight
• Distinguishability theory for time-resolved photodetection and boson sampling