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Entanglement concentration for unknown W class states

Author

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  • Zhang, Li-Hua
  • Yang, Ming
  • Cao, Zhuo-Liang

Abstract

In this paper, we propose a theoretical entanglement concentration protocol for unknown triparticle W class states, and then the physical implementation of this proposal has also been presented in cavity QED. The general protocol is mainly based on the appropriate Bell state measurements. In the feasible physical scheme, the interaction between two driven atoms and a cavity mode is a large-detuned one, so the scheme is insensitive to both the cavity decay and the thermal field.

Suggested Citation

  • Zhang, Li-Hua & Yang, Ming & Cao, Zhuo-Liang, 2007. "Entanglement concentration for unknown W class states," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 374(2), pages 611-616.
    • Handle: RePEc:eee:phsmap:v:374:y:2007:i:2:p:611-616
    DOI: 10.1016/j.physa.2006.08.018
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    References listed on IDEAS

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    1. Charles H. Bennett & David P. DiVincenzo, 2000. "Quantum information and computation," Nature, Nature, vol. 404(6775), pages 247-255, March.
    2. Jian-Wei Pan & Christoph Simon & Časlav Brukner & Anton Zeilinger, 2001. "Entanglement purification for quantum communication," Nature, Nature, vol. 410(6832), pages 1067-1070, April.
    3. Yang, Ming & Song, Wei & Cao, Zhuo-Liang, 2004. "Entanglement distillation for atomic states via cavity QED," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 341(C), pages 251-261.
    4. Takashi Yamamoto & Masato Koashi & Şahin Kaya Özdemir & Nobuyuki Imoto, 2003. "Experimental extraction of an entangled photon pair from two identically decohered pairs," Nature, Nature, vol. 421(6921), pages 343-346, January.
    5. Yang, Ming & Cao, Zhuo-Liang, 2004. "Entanglement distillation for W class states," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 337(1), pages 141-148.
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