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arXiv 2409.18570quant-ph
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一种用于忠实检测混合态中非稳定子性的魔法单调

A magic monotone for faithful detection of non-stabilizerness in mixed states

Krzysztof Warmuz, Ernest Dokudowiec, Chandrashekar Radhakrishnan, Tim Byrnes

AI总结:

提出一种基于稳定子多面体边界超平面最大违反程度的魔法单调量,为纯态和混合态的非稳定子性检测提供充要判据,计算效率优于现有方法。

摘要:

我们引入一种单调度量来量化任意量子态中的非稳定子性(或简称魔法)。该单调量为纯态和混合态魔法的检测提供了充要判据。该单调量基于确定 Pauli 字符串期望值空间中稳定子多面体的边界。这些边界可由一组超平面不等式描述,其中违反任一不等式即为魔法的充要条件。该单调量通过寻找具有最大违反程度的超平面来构造,属于一种 Minkowski 泛函。我们还引入了一种基于类似方法的见证。由于待优化参数数量较少且具有离散性,该方法比现有的鲁棒魔法等忠实混合态单调量具有更高的计算效率。

英文摘要:

We introduce a monotone to quantify the amount of non-stabilizerness (or magic for short), in an arbitrary quantum state. The monotone gives a necessary and sufficient criterion for detecting the presence of magic for both pure and mixed states. The monotone is based on determining the boundaries of the stabilizer polytope in the space of Pauli string expectation values. The boundaries can be described by a set of hyperplane inequations, where violation of any one of these gives a necessary and sufficient condition for magic. The monotone is constructed by finding the hyperplane with the maximum violation and is a type of Minkowski functional. We also introduce a witness based on similar methods. The approach is more computationally efficient than existing faithful mixed state monotones such as robustness of magic due to the smaller number and discrete nature of the parameters to be optimized.

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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