Our quantum network, aiming for multiple users, uses a star-type topology to connect all users to a single trusted relay. By performing quantum key distribution with the reply, the users can establish secure keys between themselves. We also developed the technique of encoding information on a single photon in high dimensions, which was used to realize Shor＇s algorithm using only one photon.

Our quantum network can exploit single photons with long coherence times to increase the communication distance with high stability and success rate through quantum interference and entanglement swapping. Our encoding of information on a single photon in 32 dimensions is the largest reported to date. Using such a technique, we realize a quantum factorization algorithm using only one photon.

Our quantum encryption system increases the security of data transmission with high key rate. It is beneficial for accurate time synchronization and high-resolution telescopes. Our optical quantum computing technique enables encoding the information more efficiently. It can be used for developing new drugs and materials, improving batteries, weather broadcasting, and financial investment.