{"id":109731,"date":"2020-07-09T16:06:10","date_gmt":"2020-07-09T23:06:10","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2020\/07\/the-biggest-flipping-challenge-in-quantum-computing"},"modified":"2020-07-09T16:06:10","modified_gmt":"2020-07-09T23:06:10","slug":"the-biggest-flipping-challenge-in-quantum-computing","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2020\/07\/the-biggest-flipping-challenge-in-quantum-computing","title":{"rendered":"The biggest flipping challenge in quantum computing"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/the-biggest-flipping-challenge-in-quantum-computing2.jpg\"><\/a><\/p>\n<p>Such noise nearly drowned out the signal in Google\u2019s quantum supremacy experiment. Researchers began by setting the 53 qubits to encode all possible outputs, which ranged from zero to 2<sup>53<\/sup>. They implemented a set of randomly chosen interactions among the qubits that in repeated trials made some outputs more likely than others. Given the complexity of the interactions, a supercomputer would need thousands of years to calculate the pattern of outputs, the researchers said. So by measuring it, the quantum computer did something that no ordinary computer could match. But the pattern was barely distinguishable from the random flipping of qubits caused by noise. \u201cTheir demonstration is 99% noise and only 1% signal,\u201d Kuperberg says.<\/p>\n<p>To realize their ultimate dreams, developers want qubits that are as reliable as the bits in an ordinary computer. \u201cYou want to have a qubit that stays coherent until you switch off the machine,\u201d Neven says.<\/p>\n<p>Scientists\u2019 approach of spreading the information of one qubit\u2014a \u201clogical qubit\u201d\u2014among many physical ones traces its roots to the early days of ordinary computers in the 1950s. The bits of early computers consisted of vacuum tubes or mechanical relays, which were prone to flip unexpectedly. To overcome the problem, famed mathematician John von Neumann pioneered the field of error correction.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Such noise nearly drowned out the signal in Google\u2019s quantum supremacy experiment. Researchers began by setting the 53 qubits to encode all possible outputs, which ranged from zero to 253. They implemented a set of randomly chosen interactions among the qubits that in repeated trials made some outputs more likely than others. Given the complexity [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1617,44],"tags":[],"class_list":["post-109731","post","type-post","status-publish","format-standard","hentry","category-quantum-physics","category-supercomputing"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/109731","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\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=109731"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/109731\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=109731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=109731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=109731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}