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arXiv quant-ph/0307198quant-ph
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量子过程层析的de Finetti表示定理

A de Finetti Representation Theorem for Quantum Process Tomography

Christopher A. Fuchs, Ruediger Schack, Petra F. Scudo

摘要:

在量子过程层析成像中,可以将实验者的先验信息表示为量子操作序列,即,保迹完全正映射与de Finetti的概率分布的交换量概念类似,我们给出了量子操作序列的交换量定义。然后,我们的状态,并证明了这样的可交换序列的表示定理。该定理导致一个简单的表征,可接受的先验量子过程层析成像和解决贝叶斯满意的问题,一个未知的量子操作。

英文摘要:

In quantum process tomography, it is possible to express the experimenter's prior information as a sequence of quantum operations, i.e., trace-preserving completely positive maps. In analogy to de Finetti's concept of exchangeability for probability distributions, we give a definition of exchangeability for sequences of quantum operations. We then state and prove a representation theorem for such exchangeable sequences. The theorem leads to a simple characterization of admissible priors for quantum process tomography and solves to a Bayesian's satisfaction the problem of an unknown quantum operation.

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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