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Ordinateurs quantiques : Google ouvre la voie à des dispositifs quantiques évolutifs et tolérants aux pannes en démontrant qu il est possible de réduire leurs erreurs de manière exponentielle
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Google Reports 100-Fold Improved Quantum Error Suppression
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Google demonstrates impractical improvement in quantum error correction – but it does work
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Physicists move closer to defeating errors in quantum computation
Jul. 14, 2021 , 6:30 PM
Physicists at Google have taken an important step toward protecting delicate information in their nascent quantum computer from errors that can obliterate it. The researchers can’t yet compensate for all types of errors a necessary step toward building a full-fledged quantum computer but others say they’re poised to achieve that goal.
“There s no smashing breakthrough here, but they re doing the hard work, and they re reporting clear progress for a future breakthrough,” says Greg Kuperberg, a mathematician at the University of California, Davis. Joschka Roffe, a theoretical physicist at the Free University of Berlin, says Google researchers are “within touching distance” of demonstrating full error correction.
That encounter led to Greensill being able to meet the chief executives of a number of NHS hospital trusts whose support he was seeking for a scheme to let the NHS’s 1.4m staff in England be paid daily by Greensill, via an app called Earnd, rather than monthly in what Labour said was a latter-day “junk bonds” exercise.
Harding is best known as the boss of the government’s heavily-criticised £37bn test and trace programme.
Calls for clarity about Prior’s involvement with Greensill come amid continuing controversy about the roles played by David Cameron, the former prime minister, who was a lobbyist for and senior figure at the firm, and Matt Hancock, the health secretary, who backed the payments system it wanted to introduce across the health service.