  Current quantum computers suffer from noise that stems from interactions
between the quantum system that constitutes the quantum device and its
environment. These interactions can be suppressed through dynamical decoupling
to reduce computational errors. However, the performance of dynamical
decoupling depends on the type of the system-environment interactions that are
present, which often lack an accurate model in quantum devices. We show that
the performance of dynamical decoupling can be improved by optimizing its
rotational gates to tailor them to the quantum hardware. We find that compared
to canonical decoupling sequences, such as CPMG and XY4, the optimized
dynamical decoupling sequences yield the best performance in suppressing noise
in superconducting qubits. Our work thus enhances existing error suppression
methods which helps increase circuit depth and result quality on noisy
hardware.
