Google and IBM are working on quantum computers that can perform complex computations a lot faster than the world s fastest supercomputers Now what s in it for us A machine to be reckoned with The international community of physicists is still excited about the issue Has Google s quantum computer Sycamore actually achieved so called quantum supremacy as the scientists from Moun tain View wrote in their paper published in the Oc tober issue of the science journal Nature or just a little as their main competitor IBM was quick to argue in a paper of its own The search engine giant states that it took Syca more exactly three minutes and 20 seconds to per form a task known as random circuit sampling which is about having the quantum computer cal culate numerical sequences and subsequently testing if they truly follow a distribution specifi ed by quantum physics It would take its adversary Summit a supercomputer based on normal bits and bytes 10 000 years to solve the same comput ing problem By the way Summit the world s fast est supercomputer since 2018 is from IBM Job sharing by quantum and supercomputers Director of IBM Research Dario Gil wasn t just go ing to leave this outcome uncommented If inter mediate results of this computation were to be stored on hard discs instead of in the random ac cess memory it wouldn t take Summit 10 000 years but in the worst case just 2 5 days Con sequently it wasn t appropriate to talk about true quantum supremacy in its strict defi nition that a conventional supercomputer was totally chance less against a quantum computer in solving spe cifi c problems By Denis Dilba 76

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