One-step discrimination scheme on N-particle Greenberger--Horne--Zeilinger bases
Wang Xin-Wen(汪新文)a)†, Liu Xiang(刘翔)b), and Fang Mao-Fa(方卯发)b)
a Department of Electronic Engineering and Physics, Hunan University of Science and Engineering, Yongzhou 425100, China; b College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
Abstract We present an experimentally feasible one-step discrimination scheme on Bell bases with trapped ions, and then generalize it to the case of N-ion Greenberger--Horne--Zeilinger (GHZ) bases. In the scheme, all the orthogonal and complete N-ion GHZ internal states can be exactly discriminated only by one step, and thus it takes very short time. Moreover, the scheme is insensitive to thermal motion and dose not require the individual addressing of the ions. The Bell-state and GHZ-state one-step discrimination scheme can be widely used in quantum information processing based on ion-trap set-up.
Received: 08 August 2006
Revised: 01 October 2006
Accepted manuscript online:
Fund: Project supported by the Scientific
Research Fund of Hunan Provincial Education Department, China (Grant
No 06C354), the Natural Science Foundation of Hunan Province, China
(Grant No 06JJ50015) and the fund from Hunan University of Science
and Engineering
Cite this article:
Wang Xin-Wen(汪新文), Liu Xiang(刘翔), and Fang Mao-Fa(方卯发) One-step discrimination scheme on N-particle Greenberger--Horne--Zeilinger bases 2007 Chinese Physics 16 1215
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