Generation of various multiatom entangled graph states via resonant interactions
Dong Ping(董萍)a), Zhang Li-Hua (章礼华)a)b), and Cao Zhuo-Liang (曹卓良)a)c)†
a Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, School of Physics & Material Science, Anhui University, Hefei 230039, China; b Department of Physics, Anqing Teachers College, Anqing 246011, China; c The School of Science, Hangzhou Dianzi University, Hangzhou 310018, China
Abstract In this paper, a scheme for generating various multiatom entangled graph states via resonant interactions is proposed. We investigate the generation of various four-atom graph states first in the ideal case and then in the case in which the cavity decay and atomic spontaneous emission are taken into consideration in the process of interaction. More importantly, we improve the possible distortion of the graph states coming from cavity decay and atomic spontaneous emission by performing appropriate unitary transforms on atoms. The generation of multiatom entangled graph states is very important for constructing quantum one-way computer in a fault-tolerant manner. The resonant interaction time is very short, which is important in the sense of decoherence. Our scheme is easy and feasible within the reach of current experimental technology.
Received: 26 October 2007
Revised: 13 November 2007
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 60678022 and
10704001), the Specialized Research Fund for the Doctoral Program of
Higher Education, China (Grant No 20060357008), Anhui Provincial
Natural Science Foundation,
Cite this article:
Dong Ping(董萍), Zhang Li-Hua (章礼华), and Cao Zhuo-Liang (曹卓良) Generation of various multiatom entangled graph states via resonant interactions 2008 Chin. Phys. B 17 1979
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