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arXiv quant-ph/0209138quant-ph
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镜像对称量子比特态的最大保真度重传

Maximum Fidelity Retransmission of Mirror Symmetric Qubit States

Kieran Hunter, Erika Andersson, Claire R. Gilson, Stephen M. Barnett

摘要:

本文讨论了当已知原量子态是某个特定集合的一个成员时,由单次测量结果最优重建一个量子态的问题。这个过程的一个合适的品质因数是保真度,它是我们根据测量结果构建的状态被随后的测试发现与原始状态匹配的概率。我们考虑一组三个镜像对称量子比特态的保真度的最大化。与前面的例子相比,我们发现,最小化错误识别状态的概率的策略通常不会最大化保真度。

英文摘要:

In this paper we address the problem of optimal reconstruction of a quantum state from the result of a single measurement when the original quantum state is known to be a member of some specified set. A suitable figure of merit for this process is the fidelity, which is the probability that the state we construct on the basis of the measurement result is found by a subsequent test to match the original state. We consider the maximisation of the fidelity for a set of three mirror symmetric qubit states. In contrast to previous examples, we find that the strategy which minimises the probability of erroneously identifying the state does not generally maximise the fidelity.

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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