Controlling Quantum Devices with Nonlinear Hardware

To achieve high-fidelity, coherent control of quantum systems via imperfect classical hardware, the authors provide a general framework for designing control sequences that account for distortions---even those that are nonlinear and noninvertible. These sequences are robust to both a distribution of device Hamiltonians (such as for spatially varying fields) and uncertainties in the description of the control hardware itself, greatly extending the bounds of quantum device operation.