Fidelity of the diagonal ensemble signals the many-body localization transition.

@article{Hu2016FidelityOT,
  title={Fidelity of the diagonal ensemble signals the many-body localization transition.},
  author={Taotao Hu and Kang Xue and Xiaodan Li and Yan Zhang and Hang Ren},
  journal={Physical review. E},
  year={2016},
  volume={94 5-1},
  pages={
          052119
        }
}
In this work, we use exact matrix diagonalization to explore the many-body localization (MBL) transition in a random-field Heisenberg chain. We demonstrate that the fidelity and fidelity susceptibility can be utilized to characterize the interaction-driven many-body localization transition in this closed spin system which is in agreement with previous analytical and numerical results [S. Garnerone, N. T. Jacobson, S. Haas, and P. Zanardi, Phys. Rev. Lett. 102, 057205 (2009)PRLTAO0031-900710… CONTINUE READING