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arXiv quant-ph/0604195quant-ph
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量子隐形传态中的么正变换

The Unitary Transformation in Quantum Teleportation

Zheng-Chuan Wang

摘要:

在众所周知的量子隐形传态的处理中,接收者应该通过四种可能的幺正变换之一来将他的EPR粒子的状态转换为未知量子态的副本。然而,必须强调这些酉变换的重要性。本文将证明,如果接收者没有适当地实现这些么正变换,他就不能把他的粒子的状态变换成发送者想要转移的未知状态的精确复制品。在态转换过程中,实现么正变换所需要的EPR粒子与环境之间的不可避免的耦合会降低复制品的精度。

英文摘要:

In the well known treatment of quantum teleportation, the receiver should convert the state of his EPR particle into the replica of the unknown quantum state by one of four possible unitary transformations. However, the importance of these unitary transformations must be emphasized. We will show in this paper that the receiver can not transform the state of his particle into an exact replica of the unknown state which the sender want to transfer if he have not a proper implementation of these unitary transformations. In the procedure of converting state, the inevitable coupling between EPR particle and environment which is needed by the implementation of unitary transformations will reduce the accuracy of the replica.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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