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

• 来源期刊: 中国物理（英文版）
• 关键词: ion trap concentration teleportation
• 年，卷（期）: 2007,（5）
• 页码范围: 1225-1228
• 页数: 4页
• 语种: 英文

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.