Physicists Extend Qubit Lifespan In Pivotal Validation of Quantum Computing - Sl...
source link: https://science.slashdot.org/story/23/04/11/0116254/physicists-extend-qubit-lifespan-in-pivotal-validation-of-quantum-computing
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Physicists Extend Qubit Lifespan In Pivotal Validation of Quantum Computing
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"For the first time, we have shown that making the system more redundant and actively detecting and correcting quantum errors provided a gain in the resilience of quantum information," says physicist Michel Devoret, from Yale University in Connecticut. [...] Like many quantum physics experiments, this one was run at ultra-cold temperatures -- a hundred times colder than outer space, in this case. The setup has to be carefully controlled in order to protect the qubit as much as possible. The error-corrected qubit lasted for 1.8 milliseconds -- only a blink as we might experience it, but an impressive span for a qubit operating on the quantum level. Now the research team will be able to refine the process further. "Our experiment shows that quantum error correction is a real practical tool," says Devoret. "It's more than just a proof-of-principle demonstration." In this case the breakthrough was down to several different factors, rather than one change. The QEC code was actually one from 2001, but improvements to it as well as upgrades to the quantum circuit fabrication process made a difference.
"Our experiment validates a cornerstone assumption of quantum computing, and this makes me very excited about the future of this field," says Volodymyr Sivak, a research scientist at Google and formerly at Yale University.
The research has been published in Nature.
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