Scheme for entanglement concentration of unknown partially entangled three-atom W states in cavity QED

  • Authors:

  • Hong-Fu Wang;Li-Li Sun;Shou Zhang;Kyu-Hwang Yeon

  • Affiliations:

  • Department of Physics, College of Science, Yanbian University, Yanji, People's Republic of China 133002;Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin, People's Republic of China 150001;Department of Physics, College of Science, Yanbian University, Yanji, People's Republic of China 133002 and Center for the Condensed-Matter Science and Technology, Department of Physics, Harbin In ...;Department of Physics & BK21 Program for Device Physics, College of Natural Science, Chungbuk National University, Cheongju, Republic of Korea 361-763

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2012

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Abstract

We propose a practical scheme to concentrate entanglement in a pair of unknown partially entangled three-atom W states in cavity quantum electrodynamics (QED). In the scheme, Alice, Bob, and Charlie at three distant parties can obtain one maximally entangled three-atom W state with the certain success probability from two identical partially entangled three-atom W states by local operations and classical communication. We propose the detailed process of entanglement concentration and analyze the experimental feasibility of the scheme.