Ubiquitous Nonlocal Entanglement with Majorana Zero Modes

Alessandro Romito and Yuval Gefen
Phys. Rev. Lett. 119, 157702 – Published 13 October 2017
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Abstract

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.

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  • Received 29 March 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.157702

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Alessandro Romito1 and Yuval Gefen2

  • 1Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
  • 2Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom

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Issue

Vol. 119, Iss. 15 — 13 October 2017

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