Characterization of fast ion transport via position-dependent optical deshelving

Ion transport is an essential operation in some models of quantum information processing, where fast ion shuttling with minimal motional excitation necessary for efficient, high-fidelity logic. While and cold has been demonstrated, the dynamics specific trajectory during diabatic have not studied detail. Here we describe a position-dependent optical deshelving technique useful sampling ion's position throughout its trajectory, demonstrate on linear $^{40}\text{Ca}^+$ surface-electrode trap. At high speed, trap's electrode filters strongly distort potential waveform. With this technique, observe deviations from intended constant-velocity (100 m/s) transport: measure average speed 83(2) m/s peak 251(6) over distance 120 $\mu$m