| A New Quantum Secure Direct Communication Protocol Using Decoherence-Free Subspace |
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| 作者姓名： | 葛华 刘文予 |
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| 作者单位： | [1]Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074 [2]School of Information Engineering, Wuhan University of Technology, Wuhan 430070 |
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| 摘 要： | 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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| 关 键 词： | 量子通讯 量子学 量子安全协定 量子空间 |
| 收稿时间： | 2007-2-2 |
| 修稿时间： | 2007-02-02 |
A New Quantum Secure Direct Communication Protocol Using Decoherence-Free Subspace |
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| GE Hua,LIU Wen-Yu.A New Quantum Secure Direct Communication Protocol Using Decoherence-Free Subspace[J].Chinese Physics Letters,2007,24(10):2727-2729. |
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| Authors: | GE Hua LIU Wen-Yu |
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| Institution: | 1. Department of Electronics and Information Engineering, Huazhong University of Science and Technology,Wuhan 430074; 2.School of Information Engineering, Wuhan University of Technology, Wuhan 430070 |
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| Abstract: | A new quantum secure direct communication (QSDC) protocol is proposed byusing decoherence free subspace (DFS) to avoid insecurity of the presentQSDC 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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