First quantum algorithm to characterize noise

The University of Sydney Nano Institute

Researchers at University of Sydney Nano Institute have developed the first system-wide quantum algorithm to characterize noise.

Noise is the main obstacle to building large-scale quantum computers. To tame the noise (interference or instability), scientists need to understand how it affects an entire quantum system. Until now, this information was only available for very small devices or subsets of devices.

The team has developed algorithms that work across large quantum devices. They demonstrated this by diagnosing the noise in an IBM Quantum Experience device, discovering correlations in the 14-qubit machine not previously detected. (

The paper has been published in Nature Physics.