We report a new metric of quantum states. This metric is build up from super-fidelity, which has deep connection with the Uhlmann-Jozsa fidelity and plays an important role in quantifying entanglement. We find that the new metric possess some interesting properties.
@article{arxiv.0811.3453,
title = {Super fidelity and related metric},
author = {Zhi-Hao Ma and Fu-Lin Zhang and Zhi-Hua Chen and Jing-Ling Chen},
journal= {arXiv preprint arXiv:0811.3453},
year = {2009}
}