Dynamical error reshaping for dual-rail erasure qubits

An outstanding challenge of the superconducting dual-rail qubit is that the ancillary transmons needed to facilitate erasure checks and two-qubit gates introduce a substantial amount of noise, limiting the benefits of working with erasure-biased qubits. Here, we show how to design control schemes that suppress the adverse effects of transmon-induced noise while performing erasure checks or two-qubit gates. We present experimentally friendly waveforms for these operations that suppress erasure check errors by two orders of magnitude and reduce the logical two-qubit gate infidelities by up to three orders of magnitude.