中国物理B ›› 2008, Vol. 17 ›› Issue (6): 1979-1984.doi: 10.1088/1674-1056/17/6/008

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Generation of various multiatom entangled graph states via resonant interactions

董萍1, 章礼华2, 曹卓良3   

  1. (1)Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, School of Physics & Material Science, Anhui University, Hefei 230039, China; (2)Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, School of Physics & Material Science, Anhui University, Hefei 230039, China;Department of Physics, Anqing Teachers College, Anqing 246011, China; (3)Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, School of Physics & Material Science, Anhui University, Hefei 230039, China;The School of Science, Hangzhou Dianzi University, Hangzhou 310018, China
  • 收稿日期:2007-10-26 修回日期:2007-11-13 出版日期:2008-06-20 发布日期:2008-06-20
  • 基金资助:
    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,

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)†   

  1. 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
  • Received:2007-10-26 Revised:2007-11-13 Online:2008-06-20 Published:2008-06-20
  • Supported by:
    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,

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摘要： 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.

关键词: graph state, resonant interaction, cavity decay, spontaneous emission

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.

Key words: graph state, resonant interaction, cavity decay, spontaneous emission

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
03.65.Ud (Entanglement and quantum nonlocality) 32.80.-t (Photoionization and excitation) 42.50.Pq (Cavity quantum electrodynamics; micromasers)