中国物理B ›› 2007, Vol. 16 ›› Issue (5): 1225-1228.doi: 10.1088/1009-1963/16/5/009

• GENERAL • 上一篇    下一篇

Entanglement concentration and teleportation of multipartite entangled states in an ion trap

潘长宁, 方卯发   

  1. College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2006-10-10 修回日期:2006-12-20 出版日期:2007-05-20 发布日期:2007-05-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No~10374025).

Entanglement concentration and teleportation of multipartite entangled states in an ion trap

Pan Chang-Ning(潘长宁) and Fang Mao-Fa(方卯发)†   

  1. College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • Received:2006-10-10 Revised:2006-12-20 Online:2007-05-20 Published:2007-05-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No~10374025).

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摘要： We propose an effective scheme for the entanglement concentration of a four-particle state via entanglement swapping in an ion trap. Taking the maximally entangled state after concentration as a quantum channel, we can faithfully and determinatively teleport quantum entangled states from Alice to Bob without the joint Bell-state measurement. In the process of constructing the quantum channel, we adopt entanglement swapping to avoid the decrease of entanglement during the distribution of particles. Thus our scheme provides a new prospect for quantum teleportation over a longer distance. Furthermore, the success probability of our scheme is 1.0.

Abstract: We propose an effective scheme for the entanglement concentration of a four-particle state via entanglement swapping in an ion trap. Taking the maximally entangled state after concentration as a quantum channel, we can faithfully and determinatively teleport quantum entangled states from Alice to Bob without the joint Bell-state measurement. In the process of constructing the quantum channel, we adopt entanglement swapping to avoid the decrease of entanglement during the distribution of particles. Thus our scheme provides a new prospect for quantum teleportation over a longer distance. Furthermore, the success probability of our scheme is 1.0.

Key words: ion trap, concentration, teleportation

中图分类号:  (Entanglement measures, witnesses, and other characterizations)

  • 03.67.Mn
03.65.Ta (Foundations of quantum mechanics; measurement theory) 03.65.Ud (Entanglement and quantum nonlocality) 03.67.Hk (Quantum communication)