a new demonstration of #quantumsupremacy via #bosonSampling, i.e. solving a calculation problem made with a quantum computer in a time impossible for a traditional computer
It is not therefore a question of having demonstrated a universal, foolproof, scalable or simply useful computer. But the Boson Sampling approach could be useful to go in that direction
The demonstration was made in China, for all the answers, for what we can understand, I refer you to Scott Aaronson who is the referee of the report.
Funny Story as told by Scott:
When I refereed the Science paper, I asked why the authors directly verified the results of their experiment only for up to 26-30 photons, relying on plausible extrapolations beyond that. While directly verifying the results of n-photon BosonSampling takes ~2n time for any known classical algorithm, I said, surely it should be possible with existing computers to go up to n=40 or n=50? A couple weeks later, the authors responded, saying that they’d now verified their results up to n=40, but it burned $400,000 worth of supercomputer time so they decided to stop there”
the conversation on Twitter, tha authors did not get properly billed, their sponsor footed the bill, also becasu all went into residentail heating of the nearby houses https://twitter.com/preskill/status/1334900457894891520