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论文类型：期刊论文

发表时间：2006-12-01

发表刊物：CHINESE PHYSICS LETTERS

收录刊物：SCIE、ISTIC、CSCD

卷号：23

期号：12

页面范围：3142-3144

ISSN号：0256-307X

摘要：We present a scheme for perfectly teleporting an arbitary and unknown N-particle GHZ-class state from a sender to a reciever. We just need one quantum channel composed of two or three particles in the maximally entangled state. The sender performs one Bell-state measurement on two of her particles andN-1 Hadamard operations an N-1 von Neumann measurements on the rest N-1 particles. The reciever adopts one corresponding unitary transformation on his particles shared with the sender. After that, the reciever can obtain the original N-particle also GHZ-class state by introducing N-1 ancillary particles and carrying out N-1 controlled-NOT operations. We also generalize the scheme to the case of controlled teleportation.