A note on one-way quantum deficit and quantum discord

A note on one-way quantum deficit and quantum discord One-way quantum deficit and quantum discord are two important measures of quantum correlations. We revisit the relationship between them in two-qubit systems. We investigate the conditions that both one-way quantum deficit and quantum discord have the same optimal measurement ensembles, and demonstrate that one-way quantum deficit can be derived from the quantum discord for a class of X states. Moreover, we give an explicit relation between one-way quantum deficit and entanglement of formation. We show that under phase damping channel both one-way quantum deficit and quantum discord evolve exactly in the same way for four parameter X states. Some examples are presented in details. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

A note on one-way quantum deficit and quantum discord

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Publisher
Springer US
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/s11128-015-1180-0
Publisher site
See Article on Publisher Site

References

  • Quantum entanglement
    Horodecki, R; Horodecki, P; Horodecki, M; Horodecki, K
  • Analytical solutions and criteria for the quantum discord of two-qubit $$X$$ X -states
    Maldonado-Trapp, A; Hu, A; Roa, L

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