Controlled dense coding for continuous variables using three-particle entangled states
Jing Zhang, Changde Xie, Kunchi Peng · Physical Review A · 2002
A simple scheme to realize quantum controlled dense coding with a bright tripartite entangled state light generated from nondegenerate optical parametric amplifiers is proposed in this paper. The quantum channel between Alice and Bob is controlled by Claire. As a local oscillator and balanced homodyne detector are not needed, the proposed protocol is easy to be realized experimentally.