Cauchy–Schwarz inequality for general measurements as an entanglement criterion

Cauchy–Schwarz inequality for general measurements as an entanglement criterion Considering the broadest set of measurements allowed by quantum mechanics, we demonstrate that the violation Cauchy–Schwarz inequality for any-order correlation function signals the entanglement among bosons. Our result is general—it applies to any system of bosons, even when the number of particles is not fixed, provided that there is no coherence between different number states. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Cauchy–Schwarz inequality for general measurements as an entanglement criterion

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Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer Science+Business Media New York
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-015-1181-z
Publisher site
See Article on Publisher Site

Abstract

Considering the broadest set of measurements allowed by quantum mechanics, we demonstrate that the violation Cauchy–Schwarz inequality for any-order correlation function signals the entanglement among bosons. Our result is general—it applies to any system of bosons, even when the number of particles is not fixed, provided that there is no coherence between different number states.

Journal

Quantum Information ProcessingSpringer Journals

Published: Nov 13, 2015

References

  • Bell violation using entangled photons without the fair-sampling assumption
    Giustina, M; Mech, A; Ramelow, S; Wittmann, B; Kofler, J; Beyer, J; Lita, A; Calkins, B; Gerrits, T; Nam, SW; Ursin, R; Zeilinger, A
  • Quantum entanglement
    Horodecki, R; Horodecki, P; Horodecki, M; Horodecki, K

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