Romito Alessandro, Gefen Yuval
Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.
Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom.
Phys Rev Lett. 2017 Oct 13;119(15):157702. doi: 10.1103/PhysRevLett.119.157702.
Entanglement in quantum mechanics contradicts local realism and is a manifestation of quantum nonlocality. Its presence can be detected through the violation of Bell, or Clauser-Horne-Shimony-Holt (CHSH) inequalities. Paradigmatic quantum systems provide examples of both, nonentangled and entangled states. Here, we consider a minimal complexity setup consisting of six Majorana zero modes. We find that any allowed state in the degenerate Majorana space is nonlocally entangled. We show how to measure (with available techniques) the CHSH-violating correlations using either intermediate strength or weak measurement protocols.
量子力学中的纠缠与局域实在论相矛盾，是量子非局域性的一种表现。其存在可以通过违反贝尔不等式或克劳泽 - 霍恩 - 希莫尼 - 霍尔特（CHSH）不等式来检测。典型的量子系统提供了非纠缠态和纠缠态的例子。在这里，我们考虑一个由六个马约拉纳零模组成的最小复杂度设置。我们发现简并马约拉纳空间中的任何允许态都是非局域纠缠的。我们展示了如何使用中等强度或弱测量协议（利用现有技术）来测量违反CHSH的相关性。
