Realizing ultrahigh capacity quantum superdense coding on quantum photonic chip
A research team has achieved a breakthrough in quantum communication by implementing an eight-dimensional quantum superdense coding protocol on a 16-mode photonic chip, demonstrating an unprecedented channel capacity exceeding 3 bits through the generation of high-fidelity entangled quDit states and efficient Bell state measurements that distinguish eleven orthogonal states, significantly outperforming classical communication limits.
