Prototypes of quantum-encrypted networks and all-optical quantum computers have been developed. The quantum network prototype, aiming for multiple users, uses a star topology to connect all nodes via an untrusted relay. Secret keys can be established between users through the quantum state projection at the relay. The quantum computer prototype exploits a novel technique to encode and manipulate information in high dimensions, which enables the implementation of quantum algorithms using only one photon.

The quantum-encrypted network achieves the measurement-device-independent security without entangled-photon sources, and is therefore safe against all detector side-channel attacks. The all-optical quantum computer encodes and manipulates information in 32 dimensions or time bins of the same photon, enabling the implementation of Shor's algorithm using only one photon.

The quantum-encrypted network enables secret key distribution and increases the security of data transmission on the Internet. It is also beneficial for developing accurate time synchronization and high-resolution telescopes. The all-optical quantum computer reduces the required number of physical qubits, quantum gates, and possible computing errors. It is useful for developing new drugs and materials, improving batteries, weather broadcasting, and financial investment.