When you push a button to open a garage door, it doesn’t open every garage door in the neighborhood; that’s because the opener and the door are communicating using a specific microwave frequency, a frequency no other nearby door is using.
Researchers from the University of Chicago, the US Department of Energy’s (DOE) Argonne National Laboratory, the University of Iowa, and Tohoku University in Japan have begun to develop devices that could use the same principles—sending signals through magnets instead of through the air—to connect individual qubits across a chip, as reported in a new paper published in the Proceedings of the National Academy of Sciences.
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