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Google proves quantum supremacy — world still safe External link icon.

Lock all your doors. If a Skynet T-800 turns up and says “Come with me if you want a sieve”, don’t believe him, he has no genuine interest in cooking utensils and is simply using that to lure you 1000 years into the future where, I believe, the Brexit debate is still ongoing.

Quantum supremacy sounds very grand and Terminatoresque but it just means a quantum computer has done something a non-quantum computer couldn’t do in any reasonable time.

In Google’s case, they ran a bunch of computer instructions on a quantum computer and then analysed the result. Then they tried to do the same thing on a (non-quantum) supercomputer. It took the quantum computer 3 minutes and 20 seconds to carry out its task and, if they lived long enough to wait for the result, it would have taken the supercomputer 10,000 years.

The news leaked out via a paper published on NASA’s website but Google hasn’t announced anything itself yet. Google has a policy of not commenting on things that take 3 minutes and 20 seconds.

Quantum supremacy is merely a milestone and a proof of concept rather than some sort of grandiose ‘supremacy’, but it’s nevertheless an important achievement for computer scientists.

With all this progress in the field of computing, how is it my robot vacuum cleaner spends most of its time stuck in a corner, repeatedly bashing against a wall?