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arXiv · 0808.2077

Bounds of concurrence and their relation with fidelity and frontier states

Zhihao Ma·Fu-Lin Zhang·Dong-Ling Deng·Jing-Ling Chen
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Abstract

The bounds of concurrence in [F. Mintert and A. Buchleitner, Phys. Rev. Lett. 98 (2007) 140505] and [C. Zhang \textit{et. al.}, Phys. Rev. A 78 (2008) 042308] are proved by using two properties of the fidelity. In two-qubit systems, for a given value of concurrence, the states achieving the maximal upper bound, the minimal lower bound or the maximal difference upper-lower bound are determined analytically.

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Zhihao Ma, Fu-Lin Zhang, Dong-Ling Deng, Jing-Ling Chen. 2011-10-06. Bounds of concurrence and their relation with fidelity and frontier states. https://doi.org/10.1016/j.physleta.2009.03.009

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