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2025 marks the 100th anniversary of the discovery of quantum mechanics, the UN has declared the International Year of Quantum Science and Quantum Technologies.
Google's new quantum chip, called Willow, is making waves because units of information, called qubits, can finally protect each other from errors. The same process is used in classical computers, but so far it has only worked modestly in quantum computers, because qubits lose their information faster than the information can be verified by comparing multiple qubits.
But the news of the success was a bit lost on the public, because a rather unrelated paragraph in the press release sparked a heated debate.
Hartmut Neven, head of Google's Quantum Artificial Intelligence Lab, writes: "Willow's performance is amazing: in less than 5 minutes, he performed a calculation that would take 10 billion years on one of today's fastest supercomputers. If you want to write it out, it's 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000. 00,000. and far exceeds the age of the universe."
In fact, Willow had solved a calculation unimaginably faster than any supercomputer could do. The caveat, however, is that this calculation is completely useless for everyday problems, and was chosen only to be particularly easy for a quantum computer, but particularly difficult for a supercomputer.
But Neven ended the paragraph with an unexpected twist: Willow's performance "supports the idea that quantum computing occurs in many parallel universes, consistent with the idea that we live in a multiverse, a prediction first made by David Deutsch."
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