Two recent papers, both from China that came out within a day of each other, say China now has a machine that has won the title of world's fastest Quantum Computer from Google.
Strong quantum computational advantage using a superconducting quantum processor <https://arxiv.org/abs/2106.14734> Phase-Programmable Gaussian Boson Sampling Using Stimulated Squeezed Light <https://arxiv.org/abs/2106.15534> In 2019 Google claimed their 54 Qubit Quantum Computer could solve a type of problem, called "Boson Sampling", in 3 minutes and 20 seconds that would've taken IBM's largest supercomputer 10,000 years to solve, but a few weeks later IBM disputed that claim by saying it had developed an enormously improved conventional Boson Sampling algorithm that would allow their big conventional computer to solve it and only 2 1/2 days; not as impressive as 10,000 years but 2 1/2 days is still a lot longer than 3 minutes and 20 seconds. And now the two Chinese papers say their computer solved a different Boson Sampling problem in 70 minutes with their 56 Qubit Quantum Computer (2 more Qubits can make a big difference) that was much more difficult than the one Google solved, and even with IBM's improved algorithm it would still take their conventional supercomputer at least 8 years to do what their new Quantum Computer did in 70 minutes. Actually the Chinese machine is a 66 Qubit machine, but they only used 56 of them for this test. Solving Boson Sampling problems doesn't have much practical use except to prove that a real nuts and bolts Quantum Computer, and not just a paper and ink machine, can solve problems that conventional computers cannot. I can't see any theoretical reason why in the near future they won't start solving practical problems too. John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis> t900 -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAJPayv2pvE5o9F9phnSCX%2Bf48iysxSv2qp%2BMMmsViywKOov0QQ%40mail.gmail.com.
