Project supported by the National Natural Science Foundation of China (Grant Nos. 11104159 and 10904074);the Scientific Research Foundation of Nanjing University of Posts and Telecommunications, China (Grant No. NY211008);the University Natural Science Research Foundation of Jiangsu Province, China (Grant No. 11KJA510002);the Open Research Fund of Key Labof Broadband Wireless Communication and Sensor Network Technology (Nanjing University of Posts and Telecommunications) of Ministry of Education, China;the Priority Academic Program Development Fund of Jiangsu Higher Education Institutions,China
We present an efficient entanglement purification protocol (EPP) with controlled-not (CNOT) gates and linear optics. With the CNOT gates, our EPP can reach a higher fidelity than the conventional one. Moreover, it...