a College of Computer Science and Technology, Beijing University of Technology, Beijing 100022, China; bState Key Laboratory of Information Security, Graduate School of Chinese Academy of Sciences, Beijing 100049, China; c School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
Abstract This paper proposes a circular threshold quantum secret sharing (TQSS) scheme with polarized single photons. A polarized single photon sequence runs circularly among any $t$ or more of $n$ parties and any $t$ or more of $n$ parties can reconstruct the secret key when they collaborate. It shows that entanglement is not necessary for quantum secret sharing. Moreover, the theoretic efficiency is improved to approach 100% as the single photons carrying the secret key are deterministically forwarded among any $t$ or more of $n$ parties, and each photon can carry one bit of information without quantum storage. This protocol is feasible with current technology.
Received: 19 April 2007
Revised: 28 May 2007
Accepted manuscript online:
Fund: Project supported by
the National Basic Research Program of China (973 Program) (Grant No
2007CB311100), the National High Technology Research and Development
Program of China (Grant Nos 2006AA01Z419 and 20060101Z4015), the
Major Research plan of the National Natural Science Foundation of
China (Grant No 90604023), 2008 Scientific Research Common Program
of Beijing Municipal Commission of Education, the Scientific
Research Foundation for the Youth of Beijing University of
Technology (Grant No 97007016200701), the National Research
Foundation for the Doctoral Program of Higher Education of China
(Grant No 20040013007), the National Laboratory for Modern
Communications Science Foundation of China (Grant No
9140C1101010601), and the Doctor Scientific Research Activation
Foundation of Beijing University of Technology (Grant No
52007016200702).
Cite this article:
Yang Yu-Guang(杨宇光) and Wen Qiao-Yan(温巧燕) Circular threshold quantum secret sharing 2008 Chin. Phys. B 17 419
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
