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A New Quantum Secure Direct Communication Protocol Using Decoherence-Free Subspace |
| GE Hua1,2;LIU Wen-Yu1 |
| 1Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 4300742School of Information Engineering, Wuhan University of Technology, Wuhan 430070 |
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| Cite this article: |
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GE Hua, LIU Wen-Yu 2007 Chin. Phys. Lett. 24 2727-2729 |
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Abstract A new quantum secure direct communication (QSDC) protocol is proposed by
using decoherence free subspace (DFS) to avoid insecurity of the present
QSDC protocols in a quantum noise channel. This protocol makes it easily for Bob and Alice to find eavesdropping in channel because the collective dephasing noise disappears in DFS. The probability of successful attack by Eve in this protocol is smaller than in BB84 protocol. Thus this protocol realizes secure QSDC and is feasible with present-day technology.
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| Keywords:
03.67.Hk
03.65.Ud
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Received: 02 February 2007
Published: 20 September 2007
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| PACS: |
03.67.Hk
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(Quantum communication)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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