For years, researchers have tried various ways to coax quantum bits—or qubits, the basic building blocks of quantum computers—to remain in their quantum state for ever-longer times, a key step in creating devices like quantum sensors, gyroscopes, and memories.
A team of physicists from MIT have taken an important step forward in that quest, and to do it, they borrowed a concept from an unlikely source—noise-cancelling headphones.
Those improvements, however, may only be the beginning. More advances may be possible, says Wang, first author of the study who came up with the protection protocol, as they explore other possible sources of noise. Cornell University professor of applied and engineering physics Gregory Fuchs calls the work"innovative and impactful."
"The goal is to use a billion clocks but achieve the same de-phasing time as a single clock," he continues."That allows you to get enhancements from measuring multiple clocks, but at the same time you preserve the phase coherence, so you don't lose your quantum information as fast." Based on their earlier paper, the team theorized that, if they could characterize how those interactions were affected by heat, they would be able to offset the effect and extend coherence times for the system.
Another application, Li says, may be in biology. Researchers have previously demonstrated that the use of
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