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arXiv 0811.1649quant-ph
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n个噪声Popescu-Rohrlich盒的非定域性

The non-locality of n noisy Popescu-Rohrlich boxes

Matthias Fitzi, Esther Hänggi, Valerio Scarani, Stefan Wolf

摘要:

我们量化了包含在所谓的Popescu-Rohrlich盒(PRB)的n个噪声版本中的非局部性的量,即,最大限度地违反CHSH贝尔不等式的二部系统。按照埃利祖尔,Popescu和Rohrlich的方法,我们测量系统的非局部性的量,将其表示为局部行为的凸组合,具有最大可能的权重,和非信号系统。我们表明,局部部分的n个系统,其中每一个近似一个PRB的概率$1-ε$,是为了$Θ(ε^{\lceil n/2\rceil})$在各向同性,并等于$(3ε)^n$在最大偏置的情况下。

英文摘要:

We quantify the amount of non-locality contained in n noisy versions of so-called Popescu-Rohrlich boxes (PRBs), i.e., bipartite systems violating the CHSH Bell inequality maximally. Following the approach by Elitzur, Popescu, and Rohrlich, we measure the amount of non-locality of a system by representing it as a convex combination of a local behaviour, with maximal possible weight, and a non-signalling system. We show that the local part of n systems, each of which approximates a PRB with probability $1-ε$, is of order $Θ(ε^{\lceil n/2\rceil})$ in the isotropic, and equal to $(3ε)^n$ in the maximally biased case.

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