A novel quantum key distribution scheme with orthogonal product states

Guo-Ping Guo, Chuan-Feng Li, Bao-Sen Shi, Jian Li, Guang-Can Guo

Published 2001-02-12Version 1

The general conditions for the orthogonal product states of the multi-state systems to be used in quantum key distribution (QKD) are proposed, and a novel QKD scheme with orthogonal product states in the 3x3 Hilbert space is presented. We show that this protocol has many distinct features such as great capacity, high efficiency. The generalization to nxn systems is also discussed and a fancy limitation for the eavesdropper's success probability is reached.