Researchers Map Qubit Behaviour under Varying Exchange Interactions

An unexpected interplay between qubit controls has been revealed through detailed characterisation of simultaneously driven spins with an observed exchange coupling frequency of approximately 160kHz. Previous investigations either minimised or obscured residual exchange interactions via techniques like heating, preventing isolation of its influence on spin dynamics. This work demonstrates how microwave driving and exchange coupling combine to affect qubit behaviour, opening new avenues for improved quantum gate design.