Meng Li1,2,†, Chu Li1,2,†, Yang Chen3, Lan-Tian Feng3..., Linyu Yan1,2, Qian Zhang1,2, Jueming Bao1,2, Bi-Heng Liu3, Xi-Feng Ren3,6,*, Jianwei Wang1,2,4,5, Shufeng Wang1,2,4,5, Yunan Gao1,2,4,5, Xiaoyong Hu1,2,4,5, Qihuang Gong1,2,4,5 and Yan Li1,2,4,5,7,*|Show fewer author(s)
Author Affiliations
1State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China2Frontiers Science Center for Nano-Optoelectronics, Peking University, Beijing 100871, China3Key Laboratory of Quantum Information, CAS University of Science and Technology of China, Hefei 230026, China4Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China5Peking University Yangtze Delta Institute of Optoelectronics, Nantong 226010, China6e-mail: renxf@ustc.edu.cn7e-mail: li@pku.edu.cnshow less
DOI: 10.1364/PRJ.452539
Cite this Article
Set citation alerts
Meng Li, Chu Li, Yang Chen, Lan-Tian Feng, Linyu Yan, Qian Zhang, Jueming Bao, Bi-Heng Liu, Xi-Feng Ren, Jianwei Wang, Shufeng Wang, Yunan Gao, Xiaoyong Hu, Qihuang Gong, Yan Li, "On-chip path encoded photonic quantum Toffoli gate," Photonics Res. 10, 1533 (2022)
Copy Citation Text
show less
Abstract
The quantum Toffoli gate is one of the most important three-qubit gates, but it is challenging to construct a chip according to the complicated traditional circuit. Using the optimized 3D configuration with an overpass waveguide to reduce the circuit complexity, we successfully fabricate an on-chip path encoded photonic quantum Toffoli gate enabled by the 3D capability of the femtosecond laser direct writing (FLDW) for the first time to our knowledge, whose truth-table fidelity is higher than 85.5%. Furthermore, a path encoded four-qubit controlled-controlled-controlled NOT gate is written to confirm the scalability of this resource-saving technique. This work paves the way for the FLDW of more complex and powerful photonic quantum computation chips.
