Scientists have developed the first algorithm to understand quantum noise

Noise is a major obstacle to the creation of large-scale quantum computers. To tame the noise (interference

or instability), scientists need to understand how it affects the entire quantum system. Until now, this information was only available for very small devices or subsets of devices.

The work of Dr. Robin Harper and his colleagues,published today, allows the development of algorithms that will work on large quantum devices. They demonstrated this by diagnosing noise in an IBM Quantum Experience device, detecting correlations in a 14-qubit machine. They were previously undetectable.

The results are the first implementation of provably rigorous and scalable diagnostic algorithms that can be run on modern quantum devices and beyond, the scientists emphasize.

The discovery was made by Dr. Harper, a researcher at the University of Sydney Nano Institute and a member of the Australian Research Council's Center of Excellence for Engineering Quantum Systems.

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