  Using geometric phases to realize noise-resilient quantum computing is an
important method to enhance the control fidelity. In this work, we
experimentally realize a universal nonadiabatic geometric quantum gate set in a
superconducting qubit chain. We characterize the realized single- and two-qubit
geometric gates with both quantum process tomography and randomized
benchmarking methods. The measured average fidelities for the single-qubit
rotation gates and two-qubit controlled-Z gate are 0.9977(1) and 0.977(9),
respectively. Besides, we also experimentally demonstrate the noise-resilient
feature of the realized single-qubit geometric gates by comparing their
performance with the conventional dynamical gates with different types of
errors in the control field. Thus, our experiment proves a way to achieve
high-fidelity geometric quantum gates for robust quantum computation.
