Universal quantum control with error correction (2502.19786v1)

Abstract: Error correction is generally demanded in large-scale quantum information processing and quantum computation. We here provide a universal and realtime control strategy to cope with arbitrary type of errors in the system Hamiltonian. The strategy provides multiple error-resilient paths of the interested system by the von Neumann equation for ancillary projection operators. With no extra control fields and precise designs, only the path-dependent global phase is required to vary rapidly to suppress the error-induced transitions among distinct paths. Those corrected paths can also be regarded as the approximate solutions to the time-dependent Schr\"odinger equation perturbated by errors. We practice the strategy with the cyclic transfer of populations in a three-level system, showing a superior error-resilience to parallel transport. Our universal control theory can advance the performance of various quantum tasks on imperfect systems.