Demonstration of controlled high-dimensional quantum teleportation

• Published in: Science China. Physics, mechanics & astronomy Vol. 67; no. 3; p. 230311
• Main Authors: Lv, Min-Yu, Hu, Xiao-Min, Gong, Neng-Fei, Wang, Tie-Jun, Guo, Yu, Liu, Bi-Heng, Huang, Yun-Feng, Li, Chuan-Feng, Guo, Guang-Can
• Format: Journal Article
• Language: English
• Published: Beijing Science China Press 01.03.2024; Springer Nature B.V
• Subjects: Astronomy; Circuits; Classical and Continuum Physics; Communication; Complexity; Controllers; Cooperation; Observations and Techniques; Physics; Physics and Astronomy; Protocol; Quantum teleportation; Qubits (quantum computing); Science; quantum teleportation; high dimension; quantum information; quantum nonlocality
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-023-2286-8

Controlled quantum teleportation (CQT), which is regarded as the prelude and backbone for a genuine quantum internet, reveals the cooperation, supervision, and control relationship among the sender, receiver, and controller in the quantum network within the simplest unit. Compared with low-dimensional counterparts, high-dimensional CQT can exhibit larger information transmission capacity and higher superiority of the controller’s authority. In this article, we report a proof-of-principle experimental realization of three-dimensional (3D) CQT with a fidelity of 97.4% ± 0.2%. To reduce the complexity of the circuit, we simulate a standard 4-qutrit CQT protocol in a 9×9-dimensional two-photon system with high-quality operations. The corresponding control powers are 48.1% ± 0.2% for teleporting a qutrit and 52.8% ± 0.3% for teleporting a qubit in the experiment, which are both higher than the theoretical value of control power in 2-dimensional CQT protocol (33%). The results fully demonstrate the advantages of high-dimensional multi-partite entangled networks and provide new avenues for constructing complex quantum networks.