Wang, Yuanlong; Yin, Qi; Dong, Daoyi; Qi, Bo; Petersen, Ian; Hou, Zhibo; Yonezawa, Hidehiro; Xiang, Guoyong
The identification of an unknown quantum gate is a significant issue in quantum technology. In this paper, we propose a quantum gate identification method within the framework of quantum process tomography. In this method, a series of pure states are applied to the gate and then a fast state tomography on the output states is performed and the data are used to reconstruct the quantum gate. The algorithm has computational complexity with the system dimension . The identification approach is...[Show more]
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