Deterministic secure quantum communication against collective-dephasing noise by using EPR pairs and auxiliary photons

Abstract

A deterministic secure quantum communication against collective-dephasing noise is proposed. Alice constructs two sets of three-photon bases with EPR (Einstein–Podolsky–Rosen) pairs in the state | Ψ + 〉 or | Ψ - 〉 and auxiliary single photons in the state | H 〉 . And then she sends them to Bob. Bob can get the secret message by his single-photon measurement outcomes and two public message strings from Alice if the quantum channel is secure. The scheme does not need photon storing technique and only single-photon measurement is necessary.