Focusing on the region around Δ x = λ (grey-shaded region in d ), we find that the shifted atom shows no measurable loss in fidelity compared with the unshifted atoms. Correcting for the bare fidelity for performing a global X(π) rotation (red dashed line; 0.9956(1)), we find that the shift operation is performed with a fidelity of 0.9984(5). The ratio of the shifted to unshifted fidelities is 0.9998(5), suggesting that the dominant source of error comes from global laser phase noise during the finite wait time required to perform the shift, rather than the movement itself. From the data in d , we find that the crosstalk to the static atoms is 0.1(2)%, consistent with 0.
