InAs quantum dot spins controlled with tilted magnetic fields

Researchers at the University of Strathclyde and collaborating institutions demonstrated complete coherent control of a single spin qubit within a self-assembled InAs negatively charged quantum dot. The work, published on October 7, 2026, achieved this control using oblique magnetic fields, a technique directly compared to the conventional Voigt geometry. This approach establishes that spin-qubit control does not necessarily require a pure Voigt geometry, relaxing constraints on device and field alignment for future quantum information processing architectures. The results offer a versatile route to design and optimise spin-photon interfaces in semiconductor quantum dots. The ability to perform universal single-qubit operations has been demonstrated within a self-assembled InAs quantum dot using an oblique, rather than strictly vertical or horizontal, magnetic field. This experimental work, detailed in Quantum Science and Technology, directly compares the performance of this oblique-field configuration…