Abstract In this paper a controlled quantum teleportation scheme of an N-particle unknown state is proposed when N groups of three-particle W1 states are utilized as quantum channels. The quantum information of N-particle unknown state is transmitted from the sender to the recipient under the control of all supervisors. It can be realized with a certain probability. After the sender makes Bell-state measurements and the supervisors perform the computational basis measurements, the recipient will introduce auxiliary particles and carry out unitary transformations depending on classical information from the sender and the supervisors. Finally, the computational basis measurement will be performed by the recipient to confirm whether the teleportation succeeds or not. The successful completion of the scheme relies on all supervisors' cooperation. In addition, the fidelity and security of the scheme are discussed.
Received: 13 October 2006
Revised: 23 November 2006
Accepted manuscript online:
(Entanglement measures, witnesses, and other characterizations)
Fund: Project
supported by the National Natural Science Foundation of China
(Grant No 10647101).
Cite this article:
Xiu Xiao-Ming(修晓明), Dong Li(董莉), Gao Ya-Jun(高亚军), and Chi Feng(迟锋) A controlled quantum teleportation scheme of an N-particle unknown state via three-particle W1 states 2007 Chinese Physics 16 2194
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.
