Quantum computers have finally arrived, but will they ever be useful?
Hundreds of quantum computing firms around the world are racing to commercialise these once-exotic devices, but the jury is still out on who is going to pull ahead and produce a machine that actually does something useful
![Quantum computers have finally arrived, but will they ever be useful?](https://images.newscientist.com/wp-content/uploads/2025/02/10153439/SEI_239353424.jpg)
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