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International Journal of Theoretical Physics

Controlled Quantum Secure Direct Communication with Local Separate Measurements in Cavity QED

Chuan-Jia Shan, Ji-Bing Liu, Tao Chen, Tang-Kun Liu, Yanxia Huang, Hong Li

Published Dec 1, 2009• 13 citations
Publisher
DOI
10.1007/s10773-009-0206-8

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An experimentally feasible new scheme for quantum secure direct communication is proposed in cavity quantum electrodynamics without apparent joint Bell-state measurement. The legitimate user can receive different secret messages in a direct way through Einstein–Podolsky–Rosen (EPR) pairs, the probability of the success in our scheme is unity. In the communication processes, the interactions between atoms and a single-mode non-resonant cavity with the assistance of a strong classical driving field substitute the joint measurements. Hence, this scheme needs only separate measurements. In addition, the scheme is insensitive to the cavity decay and the thermal field. The discussion of the scheme indicates that it can be realized based on current technologies.