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Transformation of bipartite non-maximally entangled states into a tripartite W state in cavity QED

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Abstract

We present two schemes for transforming bipartite non-maximally entangled states into a W state in cavity QED system, by using highly detuned interactions and the resonant interactions between two-level atoms and a single-mode cavity field. A tri-atom W state can be generated by adjusting the interaction times between atoms and the cavity mode. These schemes demonstrate that two bipartite non-maximally entangled states can be merged into a maximally entangled W state. So the scheme can, in some sense, be regarded as an entanglement concentration process. The experimental feasibility of the schemes is also discussed.

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Acknowledgements

This work is supported by National Natural Science Foundation of China (NSFC) under Grants Nos 11274010, 11204002, 11374085, 61370090 and 11204061, the Specialized Research Fund for the Doctoral Programme of Higher Education (20113401110002, 20123401120003), the Key Project of Chinese Ministry of Education (No. 210092), Anhui Provincial Natural Science Foundation under Grant Nos 1208085QA14, 1308085QA18, and 1408085MA16, the Key Programme of the Education Department of Anhui Province under Grants Nos KJ2013A195, KJ2012A244, KJ2012A206, the ‘211’ Project of Anhui University, the Talent Foundation of Anhui University under Grant No. 33190019, and the personnel department of Anhui province.

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Authors and Affiliations

  1. Key Laboratory of Opto-electronic Information Acquisition and Manipulation, Ministry of Education, School of Physics & Material Science, Anhui University, Hefei, 230601, People’s Republic of China

    XUE-PING ZANG, MING YANG, CHAO-QUN DU & MIN WANG

  2. Department of Mechanical and Electronic Engineering, Chizhou University, Chizhou, Anhui, 247000, People’s Republic of China

    XUE-PING ZANG & SHU-DONG FANG

  3. Department of Physics & Electronic Engineering, Hefei Normal University, Hefei, 230061, People’s Republic of China

    ZHUO-LIANG CAO

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  1. XUE-PING ZANG
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  2. MING YANG
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  3. CHAO-QUN DU
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  4. MIN WANG
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  5. SHU-DONG FANG
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  6. ZHUO-LIANG CAO
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Correspondence to MING YANG.

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ZANG, XP., YANG, M., DU, CQ. et al. Transformation of bipartite non-maximally entangled states into a tripartite W state in cavity QED. Pramana - J Phys 86, 1009–1019 (2016). https://doi.org/10.1007/s12043-015-1129-y

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  • DOI: https://doi.org/10.1007/s12043-015-1129-y

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