Quantum Direct Communication without Public Announcement of Basis

摘要

We present a novel quantum direct communication scheme without public announcement of basis, in which a prior secret basis sequence shared by two communication parties is repeatedly used without loss of security.This feature makes the scheme have advantages such as no requirement of quantum memory, easily employing classical error correcting code and classical privacy amplification (CPA). The capability of using CPA is based on the observation that its inverse operation is feasible. The procedure of the proposed scheme indicates that its experimental realization is as easy as the realization of quantum key distribution.