Free space quantum system based on quantum secure direct communication

Hua Ge; Wenyu Liu

doi:10.1117/12.773396

10 November 2007 Free space quantum system based on quantum secure direct communication

Hua Ge, Wenyu Liu

Proceedings Volume 6795, Second International Conference on Space Information Technology; 67950I (2007) https://doi.org/10.1117/12.773396
Event: Second International Conference on Spatial Information Technology, 2007, Wuhan, China

Abstract

A new practical free space quantum communication system is proposed, it is based on the principle of quantum secure direct communication. Quantum cryptography is a practical method to realize free space optical communication. Different from the existing free space quantum key distribution communication system, the free space quantum secure direct communication is deterministic and the system is more simple. In this paper, a new structure of four transmitting channels is prensented, this structure could increase the security and capacity of system. The setup of transmitter and receiver of each transmitting channel is discussed in detail, and the communication process is analyzed. The result shows that this free space quantum system could be realized and can work over long distance.

Citation Download Citation

Hua Ge and Wenyu Liu "Free space quantum system based on quantum secure direct communication", Proc. SPIE 6795, Second International Conference on Space Information Technology, 67950I (10 November 2007); https://doi.org/10.1117/12.773396

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