| A Flexible Improvement for Ping-Pong Protocol |
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| 作者姓名： | 刘玉 华沙 王晓鑫 李玥 叶俊 李俊 |
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| 作者单位： | [1]Department of Electronics and Information, Huazhong University of Science and Technology, Wuhan 430074 [2]Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 [3]College of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074 [4]Institute of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 |
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| 基金项目： | Supported by the Innovation Foundation of Aerospace Science and Technology of China under Grant No 20060110. |
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| 摘 要： | A deterministic quantum communication protocol, called the ping-pong protocol, has been represented by Bostr6m and Felbinger Phys. Rev. Lett. 89 （2002） 187902]. Based on an entangled pair of photons, it allows asymptotically secure key distribution and quasi-secure direct communication. However, it was concluded from our previous research that the experiment realization of this protocol requires two optic paths strictly equivalent for interferometry. Here we propose an improved protocol, which is more flexible and secure for conceivable applications. Its feasibility and security are also discussed.
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| 关 键 词： | 乒乓协议 确定性量子通信协议 柔性改进 光子纠缠对 准安全直接通信 |
| 收稿时间： | 2006-08-16 |
| 修稿时间： | 2006-08-16 |
A Flexible Improvement for Ping-Pong Protocol |
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| LIU Yu,HUA Sha&sup,WANG Xiao-Xin&sup,LI Yue&sup,YE Jun&sup,LI Jun.A Flexible Improvement for Ping-Pong Protocol[J].Chinese Physics Letters,2006,23(12):3152-3154. |
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| Authors: | LIU Yu HUA Sha&sup WANG Xiao-Xin&sup LI Yue&sup YE Jun&sup LI Jun |
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| Institution: | 1.Department of Electronics and Information, Huazhong University of Science and Technology, Wuhan 430074; 2.Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800; 3 .College of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074; 4.Institute of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 |
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| Abstract: | A deterministic quantum communication protocol, called the ping-pong protocol, has been represented by Boström and Felbinger Phys. Rev. Lett. 89 (2002) 187902]. Based on an entangled pair of photons, it allows asymptotically secure key distribution and quasi-secure direct communication. However, it was concluded from our previous research that the experiment realization of this protocol requires two optic paths strictly equivalent for interferometry. Here we propose an improved protocol, which is more flexible and secure for conceivable applications. Its feasibility and security are also discussed. |
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| Keywords: | 03 67 Hk 03 65 Ud |
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