Barnaby van Straaten

Abstract Germanium spin qubits offer high-fidelity control via strong spin-orbit interaction, but their magnetic field sensitivity typically requires bulky superconducting vector magnets that limit scalability. This study investigates replacing these with an external permanent magnet located outside the cryostat to reclaim internal sample space.

Semiconductors are the backbone of modern technology, powering devices from computers and smartphones to data centers and medical equipment. Their ability to be controlled by fast electric signals makes them ideal for both classical and quantum computing. Quantum dots—tiny regions where individual charge carriers are trapped—are promising building blocks for quantum bits that store information in the spin of electrons.