Journal article

Demonstration of non-Markovian process characterisation and control on a quantum processor.

GAL White, CD Hill, FA Pollock, LCL Hollenberg, K Modi

Nature Communications | Nature Research (part of Springer Nature) | Published : 2020

Abstract

In the scale-up of quantum computers, the framework underpinning fault-tolerance generally relies on the strong assumption that environmental noise affecting qubit logic is uncorrelated (Markovian). However, as physical devices progress well into the complex multi-qubit regime, attention is turning to understanding the appearance and mitigation of correlated - or non-Markovian - noise, which poses a serious challenge to the progression of quantum technology. This error type has previously remained elusive to characterisation techniques. Here, we develop a framework for characterising non-Markovian dynamics in quantum systems and experimentally test it on multi-qubit superconducting quantum d..

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Grants

Awarded by Australian Research Council Future Fellowship


Funding Acknowledgements

This work was supported by the University of Melbourne through the establishment of an IBM Quantum Network Hub at the University. G.A.L.W. is supported by an Australian Government Research Training Program Scholarship. C.D.H. is supported through a Laby Foundation grant at The University of Melbourne. K.M. is supported through Australian Research Council Future Fellowship FT160100073.