{"id":117283,"date":"2020-12-17T19:24:38","date_gmt":"2020-12-18T03:24:38","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2020\/12\/quantum-computational-advantage-using-photons"},"modified":"2020-12-17T19:24:38","modified_gmt":"2020-12-18T03:24:38","slug":"quantum-computational-advantage-using-photons","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2020\/12\/quantum-computational-advantage-using-photons","title":{"rendered":"Quantum computational advantage using photons"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/quantum-computational-advantage-using-photons.jpg\"><\/a><\/p>\n<p>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\u2013dependent 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 <em><i>et al.<\/i><\/em> 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<sup>30<\/sup>, they measured a sampling rate that is about 10<sup>14<\/sup>-fold faster than using state-of-the-art classical simulation strategies and supercomputers.<\/p>\n<p><em><i>Science<\/i><\/em>, this issue p. <a href=\"https:\/\/science.sciencemag.org\/lookup\/doi\/10.1126\/science.abe8770\">1460<\/a><\/p>\n<p>Quantum computers promise to perform certain tasks that are believed to be intractable to classical computers. Boson sampling is such a task and is considered a strong candidate to demonstrate the quantum computational advantage. We performed Gaussian boson sampling by sending 50 indistinguishable single-mode squeezed states into a 100-mode ultralow-loss interferometer with full connectivity and random matrix\u2014the whole optical setup is phase-locked\u2014and sampling the output using 100 high-efficiency single-photon detectors. The obtained samples were validated against plausible hypotheses exploiting thermal states, distinguishable photons, and uniform distribution. The photonic quantum computer, <em><i>Jiuzhang<\/i><\/em>, generates up to 76 output photon clicks, which yields an output state-space dimension of 10<sup>30<\/sup> and a sampling rate that is faster than using the state-of-the-art simulation strategy and supercomputers by a factor of ~10<sup>14<\/sup>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>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\u2013dependent loophole. Quantum computational advantage, rather than being a one-shot experimental proof, will be the result of a long-term [\u2026]<\/p>\n","protected":false},"author":513,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,1617,44],"tags":[],"class_list":["post-117283","post","type-post","status-publish","format-standard","hentry","category-particle-physics","category-quantum-physics","category-supercomputing"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/117283","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/513"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=117283"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/117283\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=117283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=117283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=117283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}