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Google, NASA, UTS propose ‘hello world’ test for quantum computers

What is the smallest computational task a quantum computer might be able to complete, that the most powerful supercomputers available today would find prohibitively hard?
Quantum start-up Q-Ctrl “unmixing the soup” of qubit decoherence

An Australian start-up launched this week is working to address the issue with a suite of controls that can stabilise fragile quantum systems, and “effectively turn back the clock” on decoherence.

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