2020/12/18 by Han-Sen Zhong, Hui Wang, Yu-Hao Deng +21 · 78 citations
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography
paper · doi:10.1126/science.abe8770
openalex created_date 2020/12/07 · openalex publication_date 2020/12/18 · openalex updated_date 2026/07/30
A light approach to quantum advantage Quantum computational advantage or supremacy is a long-anticipated milestone toward practical quantum computers. Recent work claimed to have reached this point, but subsequent work managed to speed up the classical simulation and pointed toward a sample size–dependent loophole. Quantum computational advantage, rather than being a one-shot experimental proof, will be the result of a long-term competition between quantum devices and classical simulation. Zhong et al. sent 50 indistinguishable single-mode squeezed states into a 100-mode ultralow-loss interferometer and sampled the output using 100 high-efficiency single-photon detectors. By obtaining up to 76-photon coincidence, yielding a state space dimension of about 10 30 , they measured a sampling rate that is about 10 14 -fold faster than using state-of-the-art classical simulation strategies and supercomputers. Science , this issue p. 1460