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arXiv 1409.8480quant-ph
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凸高斯状态检测的完全判据

Complete criterion for convex-Gaussian state detection

Anna Vershynina

摘要:

我们提出了一个新的标准,确定是否费米子态是一个纯高斯态的凸组合。这个判据是完备的,从内部刻画了凸高斯态的集合。如果一个状态通过了一个程序,它就是一个凸高斯状态,任何凸高斯状态都可以用通过该标准的状态以任意精度近似。该准则的形式提出了一系列的可解半定程序。它也是de Melo,Cwiklinski和Terhal开发的一个补充,其目的是从外部表征凸高斯态的集合。在这里,我们提出了一个明确的证明,由德梅洛等人的标准是完整的,通过估计之间的距离n-可扩展的状态,状态,通过标准,凸高斯状态的集合。

英文摘要:

We present a new criterion that determines whether a fermionic state is a convex combination of pure Gaussian states. This criterion is complete and characterizes the set of convex-Gaussian states from the inside. If a state passes a program it is a convex-Gaussian state and any convex-Gaussian state can be approximated with arbitrary precision by states passing the criterion. The criterion is presented in the form of a sequence of solvable semidefinite programs. It is also complementary to the one developed by de Melo, Cwiklinski and Terhal, which aims at characterizing the set of convex-Gaussian states from the outside. Here we present an explicit proof that criterion by de Melo et al. is complete, by estimating a distance between an n-extendible state, a state that passes the criterion, to the set of convex-Gaussian states.

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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