Detection of Macroscopic Entanglement by Correlation of Local Observables

Akira Shimizu and Tomoyuki Morimae
Phys. Rev. Lett. 95, 090401 – Published 23 August 2005; Erratum Phys. Rev. Lett. 117, 219903 (2016)

Abstract

We propose a correlation of local observables on many sites in macroscopic quantum systems. By measuring the correlation one can detect, if any, superposition of macroscopically distinct states, which we call macroscopic entanglement, in arbitrary quantum states that are (effectively) homogeneous. Using this property, we also propose an index of macroscopic entanglement.

  • Received 12 April 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.090401

©2005 American Physical Society

Erratum

Authors & Affiliations

Akira Shimizu* and Tomoyuki Morimae

  • Department of Basic Science, University of Tokyo, 3-8-1 Komaba, Tokyo 153-8902, Japan and PRESTO, Japan Science and Technology Corporation, 4-1-8 Honcho, Kawaguchi, Saitama, Japan

  • *Electronic address: shmz@ASone.c.u-tokyo.ac.jp

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Issue

Vol. 95, Iss. 9 — 26 August 2005

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