中国物理B ›› 2007, Vol. 16 ›› Issue (5): 1225-1228.doi: 10.1088/1009-1963/16/5/009
潘长宁, 方卯发
Pan Chang-Ning(潘长宁) and Fang Mao-Fa(方卯发)†
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.
中图分类号: (Entanglement measures, witnesses, and other characterizations)