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Title of Journal: Quantum Inf Process

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Abbravation: Quantum Information Processing

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Springer US

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DOI

10.1016/j.aej.2016.05.022

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1573-1332

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Quantum discord for the general twoqubit case

Authors: Xiaohua Wu Tao Zhou
Publish Date: 2015/03/31
Volume: 14, Issue: 6, Pages: 1959-1971
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Abstract

Recently Girolami and Adesso Phys Rev A 83 052108 2011 have demonstrated that the calculation of quantum discord for twoqubit case can be viewed as to solve a pair of transcendental equation In the present work we introduce the generalized Choi–Jamiolkowski isomorphism and apply it as a convenient tool for constructing transcendental equations For the general twoqubit case we show that the transcendental equations always have a finite set of universal solutions this result can be viewed as a generalization of the one obtained by Ali et al Phys Rev A 81 042105 2010 For a subclass of X state we find the analytical solutions by solving the transcendental equations

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  2. Super quantum discord for general two qubit X states
  3. Non-Markovian entanglement dynamics of two qubits interacting with a common electromagnetic field
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  10. On conclusive eavesdropping and measures of mutual information in quantum key distribution
  11. The CGMV method for quantum walks
  12. Concurrence in the framework of coherent states
  13. Noncyclic geometric quantum computation and preservation of entanglement for a two-qubit Ising model
  14. Noise and the magic square game
  15. Geometry and dynamics of one-norm geometric quantum discord
  16. Nuclear polarization and entanglement in spin systems
  17. Controllability and Universal Three-qubit Quantum Computation with Trapped Electron States
  18. Quantum relative phase, m -tangle, and multi-local Lorentz-group invariant
  19. Perfect state transfer by means of discrete-time quantum walk on complete bipartite graphs
  20. Dynamics of one-dimensional tight-binding models with arbitrary time-dependent external homogeneous fields
  21. Classical–quantum arbitrarily varying wiretap channel: Ahlswede dichotomy, positivity, resources, super-activation
  22. Multi-party quatum private compariso protocol with $$$$-level etagled states
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