A new representation and probabilistic teleportation of an arbitrary and unknown N-particle state

• 来源期刊: 中国物理（英文版）
• 关键词: arbitrary and unknown N-particle statc probabilistic teleportation entanglement
• 年，卷（期）: 2006,（12）
• 页码范围: 2835-2839
• 页数: 5页
• 语种: 英文

摘要

A new representation of an arbitrary and unknown N-particle state is presented at first. As an application,a scheme for teleporting an arbitrary and unknown N-particle state is proposed when N pairs of two-particle nonmaximally entangled states are utilized as quantum channels. After Alice (sender) makes Bell-state measurement on her particles, Bob (recipient) introduces an auxiliary particle and carries out appropriate unitary transformation on his particle and the auxiliary particle depending on classical information from Alice. Then, yon Neumann measurement that confirms whether the teleportation succeeds or not is performed by Bob on the auxiliary particle. In order to complete the teleportation, another N-1 times operations need to be performed which are similar to the above ones. It can be successfully realized with a certain probability which is determined by the product of the smaller coefficients of non-maximally entangled pairs. All possible unitary transformations are given in detail.