Quantum Dialogue Protocol Using a Class of Three-Photon W States
Li Dong, Xiu Xiao-Ming, Gao Ya-Jun, Chi Feng · Communications in Theoretical Physics · 2009
A theoretical protocol of quantum dialogue is proposed, which uses a class of three-photon W states as quantum channel. After two-step security check, four-bit secret message can be transmitted to each other by transmitting of single photon with the aid of two-bit classical information.