|
|||||
|
|
Revisiting Controlled Quantum Secure Direct Communication Using a Non-symmetric Quantum Channel with Quantum Superdense Coding |
|
| Authors: | LIU Jun LIU Yi-Min XIA Yan ZHANG Zhan-Jun |
| Institution: | 1. Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of China, School of Physics & Material Science, Anhui University, Hefei 230039, China ;2. Department of Physics, Shaoguan University, Shaoguan 512005, China ;3. School of Physic and Optoelectronic, Dalian University of Technology, Dalian 116024, China |
| Abstract: | Recently Xia and Song Phys. Lett. A 364 (2007) 117] have proposed a controlled quantum secure direct communication (CQSDC) protocol. They claimed that in their protocol only with the help of the controller Charlie, the receiver Alice can successfully extract the secret message from the sender Bob. In this letter, first we will show that within their protocol the controller Charlie's role could have been excluded if it were not for their unreasonable design. We then revise the Xia-Song CQSDC protocol such that its original advantages are retained and the CQSDC can be really realized. |
| Keywords: | quantum secure direct communication quantum superdense coding non-symmetric quantumchannel |
| 本文献已被 维普 等数据库收录！ | |
| 点击此处可从《理论物理通讯》浏览原始摘要信息 | |
| 点击此处可从《理论物理通讯》下载免费的PDF全文 | |