Super fidelity and related metric
  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. 
Zhi-Hao Ma, Fu-Lin Zhang, Zhi-Hua Chen, Jing-Ling Chen