Suppression of Crosstalk in Superconducting Qubits Using Dynamical Decoupling

Crosstalk suppression is a key requirement for scalable implementations of fault-tolerant quantum computing, in particular using superconducting devices. This study demonstrates a simple, effective, and easily scalable scheme for dynamical decoupling to slash crosstalk. The scheme uses existing logic gates and does not require any additional calibrations or complexity. Apart from showing significant improvements in quantum memory experiments with multiqubit commercial processors, this approach also boosts the performance of single- and two-qubit gates. This method is suitable for immediate incorporation into both near-term NISQ and longer-term fault-tolerant systems.