Analytic expression of quantum correlations in qutrit Werner states undergoing local and nonlocal unitary operations

Analytic expression of quantum correlations in qutrit Werner states undergoing local and nonlocal... Quantum correlations of a qutrit pair in Werner states undergoing local and nonlocal unitary operations are quantified in terms of two different methods, i.e., quantum discord (Ollivier and Zurek in Phys Rev Lett 88:017901, 2001) and measurement-induced disturbance (Luo in Phys Rev A 77:022301, 2008). Analytic expressions of the two kinds of quantum correlations in the system are worked on and found to be completely the same. By virtue of investigations and discussions, we expose some distinct features of the correlations and their underlying physics. More importantly, we found that both local and nonlocal unitary operations cannot increase quantum correlation in a qutrit Werner state for the two quantifiers which are concerned. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Analytic expression of quantum correlations in qutrit Werner states undergoing local and nonlocal unitary operations

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Publisher
Springer US
Copyright
Copyright © 2014 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/s11128-014-0888-6
Publisher site
See Article on Publisher Site

Abstract

Quantum correlations of a qutrit pair in Werner states undergoing local and nonlocal unitary operations are quantified in terms of two different methods, i.e., quantum discord (Ollivier and Zurek in Phys Rev Lett 88:017901, 2001) and measurement-induced disturbance (Luo in Phys Rev A 77:022301, 2008). Analytic expressions of the two kinds of quantum correlations in the system are worked on and found to be completely the same. By virtue of investigations and discussions, we expose some distinct features of the correlations and their underlying physics. More importantly, we found that both local and nonlocal unitary operations cannot increase quantum correlation in a qutrit Werner state for the two quantifiers which are concerned.

Journal

Quantum Information ProcessingSpringer Journals

Published: Nov 27, 2014

References

  • Can quantum-mechanical description of physical reality be considered complete?
    Einstein, A; Podolsky, B; Rosen, N
  • Perfect teleportation of arbitrary n-qudit states using different quantum channels
    Zhang, ZJ; Liu, YM
  • Quantum discord for two-qubit X states: analytical formula with very small worst-case error
    Huang, YC
  • Analytic expressions of discord and geometric discord in Werner derivatives
    Tang, H; Liu, YM; Chen, J; Ye, B; Zhang, ZJ
  • Geometric measure of quantum discord for a two-parameter class of states in a qubit–qutrit system under various dissipative channels
    Wei, HR; Ren, BC; Deng, FG
  • Quantum correlating power of local quantum channels
    Hu, X; Fan, H; Zhou, DL; Liu, WM
  • Experimental generation of quantum discord via noisy processes
    Lanyon, BP; Jurcevic, P; Hempel, C; Gessner, M; Vedral, V; Blatt, R; Roos, CF

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