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Chip-to-Chip Quantum Photonic Controlled-not Gate Teleportation
Lan-Tian Feng1,2,3, Ming Zhang4, Di Liu1,2,3
1University of Science and Technology of China, Laboratory of Quantum Information, Hefei 230026, China.
Physical Review Letters
|July 31, 2025
Summary
Researchers achieved high-fidelity quantum controlled-not (CNOT) gate teleportation using silicon photonic integrated circuits. This breakthrough enables remote quantum gate operations, advancing practical quantum networks.
Area of Science:
- Quantum Information Science
- Photonic Integrated Circuits
- Quantum Networking
Background:
- Quantum networks are crucial for advanced quantum information processing.
- Remote quantum gate control is essential for network functionality.
- Silicon photonics offers a scalable platform for quantum technologies.
Purpose of the Study:
- To implement high-fidelity quantum controlled-not (CNOT) gate teleportation.
- To demonstrate remote quantum gate operations using silicon photonic integrated circuits.
- To advance the development of practical, large-scale quantum networks.
Main Methods:
- Utilized high-dimensional path-encoded silicon photonic integrated circuits.
- Implemented on-chip generation of path-entangled quantum states.
- Performed chip-to-chip quantum photonic interconnects over single-mode optical fibers (5m and 1km).
Main Results:
- Achieved high-fidelity CNOT gate teleportation between remote quantum nodes.
- Verified remote qubit entanglement with average fidelities of 95.69% (5m) and 94.07% (1km).
- Confirmed gate performance through tomography with fidelities of 94.81% (5m) and 93.04% (1km).
Conclusions:
- Demonstrated the feasibility of remote quantum gate operations via teleportation.
- Validated the effectiveness of silicon photonic integrated circuits for quantum networking.
- Paved the way for scalable and practical quantum networks.
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