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Test-driving a quantum computer

It may not be long until they overtake our fastest supercomputers

By Philip Ball  

IBM's five "Qubit" quantum processor ©IBM

I’d expected to have to wait a decade or so before I could use a quantum computer. But on the contrary I can do it today. And so can you. From 4th May, technology multinational IBM is making its prototype quantum processor available for the public to use on a cloud-based platform accessible from any mobile or desktop device.

In the IBM Quantum Experience you can run experiments and algorithms that use “quantum bits” (qubits). Roughly speaking, these are…

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