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纠缠与贝尔不等式的几何图象

A Geometric Picture of Entanglement and Bell Inequalities

R. A. Bertlmann, H. Narnhofer, W. Thirring

摘要:

我们在实Hilbert空间H_s中研究了hermitian Hilbert-Schmid算子,证明了证明广义贝尔不等式(GBI)最大违反的纠缠见证是可分态凸集S子集H_s的切泛函.这种破坏等于纠缠态到S的H_s中的欧几里得距离,因此纠缠、GBI和正切泛函只是同一几何图像的不同方面。这是明确说明的例子中的两个自旋,也与熟悉的贝尔不等式的比较。

英文摘要:

We work in the real Hilbert space H_s of hermitian Hilbert-Schmid operators and show that the entanglement witness which shows the maximal violation of a generalized Bell inequality (GBI) is a tangent functional to the convex set S subset H_s of separable states. This violation equals the euclidean distance in H_s of the entangled state to S and thus entanglement, GBI and tangent functional are only different aspects of the same geometric picture. This is explicitly illustrated in the example of two spins, where also a comparison with familiar Bell inequalities is presented.

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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