James' research examines how errors degrade the performance of noisy quantum devices. He has a particular focus on developing new techniques for verification and error mitigation to quantify and limit the effects of errors in noisy computations. One of the main objects of his research is to improve the performance of noisy quantum hardware such that it operates in a regime of useful quantum advantage. He works as part of the 'Quantum Computing Platform for NISQ Era Commercial Applications' and 'AutoQC' research consortia.
Simplifying errors by symmetry and randomisation (2023), arxiv:2303.02712