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High-Capacity Quantum Secure Direct Communication Based on Quantum Hyperdense Coding with Hyperentanglement |
| WANG Tie-Jun1,2,3, LI Tao1, DU Fang-Fang1, DENG Fu-Guo1**
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1Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875
2College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875
3Beijing Radiation Center, Beijing 100875
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| Cite this article: |
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WANG Tie-Jun, LI Tao, DU Fang-Fang et al 2011 Chin. Phys. Lett. 28 040305 |
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Abstract We present a quantum hyperdense coding protocol with hyperentanglement in polarization and spatial-mode degrees of freedom of photons first and then give the details for a quantum secure direct communication (QSDC) protocol based on this quantum hyperdense coding protocol. This QSDC protocol has the advantage of having a higher capacity than the quantum communication protocols with a qubit system. Compared with the QSDC protocol based on superdense coding with d-dimensional systems, this QSDC protocol is more feasible as the preparation of a high-dimension quantum system is more difficult than that of a two-level quantum system at present.
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| Keywords:
03.67.Hk
03.67.Dd
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Received: 25 February 2011
Published: 29 March 2011
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| PACS: |
03.67.Hk
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(Quantum communication)
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03.67.Dd
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(Quantum cryptography and communication security)
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