Secure deterministic communication without entanglement.
We propose a protocol for deterministic communication that does not make use of entanglement. It exploits nonorthogonal states in a two-way quantum channel to attain unconditional security and high efficiency of the transmission. We explicitly show the scheme is secure against a class of individual attacks regardless of the noise on the channel. Its experimental realization is feasible with current technology.
Lucamarini
Marco
M
Dipartimento di Fisica, Università di Roma La Sapienza, I-00185 Roma, Italy.
Mancini
Stefano
S