Ai Qun Liu

An integrated chip system for MDI-QKD is demonstrated. The MDI-QKD transmitter chips and server chip work on a key rate per pulse of 2.923 × 10^(-6) over a distance corresponding to 50-km optical fiber with 25% detection efficiency.

Currently most quantum teleportation experiments are based on qubits. Here, we demonstrate a quantum autoencoder assisted teleportation for high-dimensional quantum states. Our method of training the autoencoder allows us to take a finite sample of those states, learn how to compress them to qubits with nearly unit fidelity. After training, we can teleport any further states from the sender and reconstruct them with high fidelity on the receiver part. We verify the proposed scheme by teleporting a qutrit via a silicon-photonic chip. High fidelity is achieved between the input qutrit and the qutrit recovered from the teleported qubit.