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International Journal of Theoretical Physics

, Volume 53, Issue 7, pp 2216–2221 | Cite as

A Quantum Secure Direct Communication Protocol Without Quantum Memories

  • Yun-yan Yang
Article

Abstract

In this Letter, we propose a quantum secure direct communication protocol based on single photons without quantum memories. In the proposed protocol, quantum states are transmitted in a stream but not in a quantum data block, hence, quantum memories are unnecessary. Compare with other protocols the advantages of our protocol are smaller quantum space usage, lower cost and more easily being implemented experimentally.

Keywords

Quantum secure direct communication Quantum memory Unitary operators 

Notes

Acknowledgements

This research was supported by the Harbin Engineering University Fundamental research funds for the Central Universities.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of MathematicsHarbin Engineering UniversityHarbinChina

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