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Chip-fiber-chip quantum teleportation in a star-topology quantum network.

Anahita Khodadad Kashi^1,2, Michael Kues^3,4

¹Institute of Photonics, Leibniz University Hannover, 30167, Hannover, Germany. anahita.khodadadkashi@iop.uni-hannover.de.

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Summary

Researchers achieved quantum teleportation of qubits over 12.3 km using a chip-fiber-chip link in a star network. This demonstrates stable quantum communication over extended distances.

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Area of Science:

Quantum Information Science
Quantum Networking
Optoelectronics

Background:

Quantum teleportation is crucial for quantum communication and networks.
Previous experiments have faced limitations in distance and stability.
Integrating quantum devices on-chip is key for scalable quantum networks.

Purpose of the Study:

To demonstrate chip-fiber-chip quantum teleportation over a significant distance.
To establish a star-topology quantum network with on-chip nodes.
To enhance the stability of quantum measurements in a network setting.

Main Methods:

Utilized time-bin-encoded qubits for quantum teleportation.
Implemented a 12.3 km optical fiber link connecting on-chip user, relay, and central nodes.
Employed an active feedback optimization scheme for Bell state measurements.

Main Results:

Successfully achieved chip-fiber-chip quantum teleportation of qubits.
Demonstrated the functionality of a star-topology quantum network with integrated nodes.
Ensured highly stable Bell state measurements through active feedback.

Conclusions:

Chip-fiber-chip quantum teleportation is feasible over extended fiber links.
The developed star-topology network architecture supports stable quantum communication.
Active feedback mechanisms are vital for robust quantum network performance.