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A Flexible Improvement for Ping-Pong Protocol |
| LIU Yu1;HUA Sha¹;WANG Xiao-Xin²;LI Yue³;YE Jun¹;LI Jun4 |
| ¹Department of Electronics and Information, Huazhong University of Science and Technology, Wuhan 430074
²Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
³College of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan 430074
⁴Institute of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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LIU Yu, HUA Sha&sup, WANG Xiao-Xin&sup et al 2006 Chin. Phys. Lett. 23 3152-3154 |
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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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03. 65. Ud
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Published: 01 December 2006
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