Tripartite entanglement of electron spins of noninteracting electron gases

Tripartite entanglement of electron spins of noninteracting electron gases By using the tripartite negativity as entanglement measure, we study the tripartite entanglement of electron spins of noninteracting electron gases. Our results imply that the tripartite entanglement depends on the relative distance between the three spins and the temperature. By a comparison between the tripartite negativity and quantum mutual information, for the symmetrical configuration that the relative distances between each pair of the three spins are the same, the quantum mutual information lasts a longer relative distance than the tripartite negativity does. While for the unsymmetrical configuration, the analysis imply that the tripartite negativity just measures the tripartite correlation while the quantum mutual information maybe takes the bipartite correlation into account. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Tripartite entanglement of electron spins of noninteracting electron gases

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Publisher
Springer Journals
Copyright
Copyright © 2012 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/s11128-012-0495-3
Publisher site
See Article on Publisher Site

Abstract

By using the tripartite negativity as entanglement measure, we study the tripartite entanglement of electron spins of noninteracting electron gases. Our results imply that the tripartite entanglement depends on the relative distance between the three spins and the temperature. By a comparison between the tripartite negativity and quantum mutual information, for the symmetrical configuration that the relative distances between each pair of the three spins are the same, the quantum mutual information lasts a longer relative distance than the tripartite negativity does. While for the unsymmetrical configuration, the analysis imply that the tripartite negativity just measures the tripartite correlation while the quantum mutual information maybe takes the bipartite correlation into account.

Journal

Quantum Information ProcessingSpringer Journals

Published: Oct 13, 2012

References

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