Bounds of concurrence and their relation with fidelity and frontier states
Quantum Physics
2011-10-07 v3
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.
Cite
@article{arxiv.0808.2077,
title = {Bounds of concurrence and their relation with fidelity and frontier states},
author = {Zhihao Ma and Fu-Lin Zhang and Dong-Ling Deng and Jing-Ling Chen},
journal= {arXiv preprint arXiv:0808.2077},
year = {2011}
}