Figure 1
APS/Alan Stonebraker

Figure 1: A schematic of the device and magnetic fields involved in the experiment. An in-plane magnetic field (large grey arrow) is used to magnetize the split cobalt micromagnet (yellow). This results in magnetic field gradients (small grey arrows) across the quantum dots (blue and red disks). Microwaves applied to the micromagnet create spatial displacements of the electrons in the quantum dots. Single spin rotations occur when the microwaves are resonant with the local Zeeman fields. By shaping the micromagnets, which results in different gradients across each quantum dot, addressability of the two electron spins (white arrows) is achieved.