Shuttling Domain Wall Qubit on the Magnetic Racetrack

Explore a groundbreaking proposal for a scalable quantum computer implementation using mobile domain walls on magnetic racetracks in this 50-minute lecture. Delve into the concept of encoding quantum information within the chirality of spin structures in nanoscale domain walls. Learn about the estimated long lifetimes of these qubits and their operation at sweet spots to reduce potential noise sources. Discover how single-qubit gates are implemented through controlled movement of walls in magnetic nanowires, and how two-qubit entangling gates leverage naturally emerging interactions between different walls. Understand how these gates enable universal quantum computing while remaining compatible with current state-of-the-art experiments on racetrack memories. Explore possible schemes for qubit readout and initialization in this innovative approach to quantum computing hardware.