Geometric interpretation for A-fidelity and its relation with Bures fidelity
Quantum Physics
2008-12-30 v2
Abstract
A geometric interpretation for the A-fidelity between two states of a qubit system is presented, which leads to an upper bound of the Bures fidelity. The metrics defined based on the A-fidelity are studied by numerical method. An alternative generalization of the A-fidelity, which has the same geometric picture, to a -state quantum system is also discussed.
Cite
@article{arxiv.0809.1786,
title = {Geometric interpretation for A-fidelity and its relation with Bures fidelity},
author = {Zhihao Ma and Fu-Lin Zhang and Jing-Ling Chen},
journal= {arXiv preprint arXiv:0809.1786},
year = {2008}
}
Comments
4 pages, 1 figure. Phys. Rev. A