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Today Google announced that it achieved “quantum supremacy.” Its chief quantum computing rival, IBM, said it hasn’t. The disagreement hinges on what the term really means.
Researchers are getting close to building a quantum computer that can perform tasks a classical computer can’t. Here’s what the milestone will mean.
Pure, verifiable randomness is hard to come by. Two proposals show how to make quantum computers into randomness factories.
The universe of problems that a computer can check has grown. The researchers’ secret ingredient? Quantum entanglement.
Quantum computers can’t selectively forget information. A new algorithm for multiplication shows a way around that problem.
One of the first quantum simulators has produced a puzzling phenomenon: a row of atoms that repeatedly pops back into place.