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arXiv quant-ph/9808018quant-ph
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量子态分离、无扰鉴别与精确克隆

Quantum State Separation, Unambiguous Discrimination and Exact Cloning

Anthony Chefles, Stephen M. Barnett

摘要:

非对称性鉴别和精确克隆减少了量子态之间的平方重叠,举例说明了我们称之为状态分离的更一般类型的过程。我们得到了两个等概率量子态以任意程度分离的最大概率,并发现已建立的判别和克隆成功概率的界是这个一般界的特例.后者也给出了成功产生一个量子系统的N个精确副本的最大概率,该量子系统的状态是从已知对中秘密选择的,给定该状态的M个初始实现,其中N>M。我们还讨论了这个界与不含糊状态判别界之间的关系。

英文摘要:

Unambiguous discrimination and exact cloning reduce the square-overlap between quantum states, exemplifying the more general type of procedure we term state separation. We obtain the maximum probability with which two equiprobable quantum states can be separated by an arbitrary degree, and find that the established bounds on the success probabilities for discrimination and cloning are special cases of this general bound. The latter also gives the maximum probability of successfully producing N exact copies of a quantum system whose state is chosen secretly from a known pair, given M initial realisations of the state, where N>M. We also discuss the relationship between this bound and that on unambiguous state discrimination.

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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