Predominance of entanglement of formation over quantum discord under quantum channels

Predominance of entanglement of formation over quantum discord under quantum channels We present a study of the behavior of two different figures of merit for quantum correlations, entanglement of formation and quantum discord, under quantum channels showing how the former can, counterintuitively, be more resilient to such environments spoiling effects. By exploiting strict conservation relations between the two measures and imposing necessary constraints on the initial conditions we are able to explicitly show this predominance is related to build-up of the system-environment correlations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Predominance of entanglement of formation over quantum discord under quantum channels

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Publisher
Springer US
Copyright
Copyright © 2013 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/s11128-013-0548-2
Publisher site
See Article on Publisher Site

Abstract

We present a study of the behavior of two different figures of merit for quantum correlations, entanglement of formation and quantum discord, under quantum channels showing how the former can, counterintuitively, be more resilient to such environments spoiling effects. By exploiting strict conservation relations between the two measures and imposing necessary constraints on the initial conditions we are able to explicitly show this predominance is related to build-up of the system-environment correlations.

Journal

Quantum Information ProcessingSpringer Journals

Published: Mar 7, 2013

References

  • Ordering states with entanglement measures
    Virmani, S; Plenio, MB
  • Genuine quantum and classical correlations in multipartite systems
    Giorgi, GL; Bellomo, B; Galve, F; Zambrini, R
  • Long-range quantum discord in critical spin systems
    Maziero, J; Cleri, LC; Serra, RM; Sarandy, MS

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