Experimental Implementation of Universal Nonadiabatic Geometric Quantum Gates in a Superconducting Circuit
Yuan Xu, Ziyue Hua, Tao Chen, Xiaoxuan Pan, X. Li, J. Han, Weizhou Cai, Y. Ma, H. Wang, Yipu Song, Zheng‐Yuan Xue, Liang Sun · Physical Review Letters · 2020
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.