Quantum circuits with many photons on a programmable nanophotonic chip
Abstract
Growing interest in quantum computing for practical applications has led to a surge in the availability of programmable machines for executing quantum algorithms. Present day photonic quantum computers have been limited either to non-deterministic operation, low photon numbers and rates, or fixed random gate sequences. Here we introduce a full-stack hardware-software system for executing many-photon quantum circuits using integrated nanophotonics: a programmable chip, operating at room temperature and interfaced with a fully automated control system. It enables remote users to execute quantum algorithms requiring up to eight modes of strongly squeezed vacuum initialized as two-mode squeezed states in single temporal modes, a fully general and programmable four-mode interferometer, and genuine photon number-resolving readout on all outputs. Multi-photon detection events with photon numbers and rates exceeding any previous quantum optical demonstration on a programmable device are made possible by strong squeezing and high sampling rates. We verify the non-classicality of the device output, and use the platform to carry out proof-of-principle demonstrations of three quantum algorithms: Gaussian boson sampling, molecular vibronic spectra, and graph similarity.
Cite
@article{arxiv.2103.02109,
title = {Quantum circuits with many photons on a programmable nanophotonic chip},
author = {J. M. Arrazola and V. Bergholm and K. Brádler and T. R. Bromley and M. J. Collins and I. Dhand and A. Fumagalli and T. Gerrits and A. Goussev and L. G. Helt and J. Hundal and T. Isacsson and R. B. Israel and J. Izaac and S. Jahangiri and R. Janik and N. Killoran and S. P. Kumar and J. Lavoie and A. E. Lita and D. H. Mahler and M. Menotti and B. Morrison and S. W. Nam and L. Neuhaus and H. Y. Qi and N. Quesada and A. Repingon and K. K. Sabapathy and M. Schuld and D. Su and J. Swinarton and A. Száva and K. Tan and P. Tan and V. D. Vaidya and Z. Vernon and Z. Zabaneh and Y. Zhang},
journal= {arXiv preprint arXiv:2103.02109},
year = {2021}
}