Analysis

Quantum computing explained and what’s different about PsiQuantum

The Australian-invented machine uses light particles, which could be a fast way to build a quantum computer but might use too much power.

John DavidsonColumnist

Apr 30, 2024 – 6.03pm

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There are two big things you need to know about quantum computers: they are made up of “qubits”, each of which are fiendishly difficult to make; and they need lots of them working together in unison, which is harder still.

Queensland Treasurer Cameron Dick wasn’t wrong when he likened building a quantum computer to the Apollo mission to the moon. It’s that difficult, and that costly.

John Davidson is an award-winning columnist, reviewer, and senior writer based in Sydney and in the Digital Life Laboratories, from where he writes about personal technology.