Renormalization-group approach to quantum Fisher information in the two-dimensional XY model Z. J. Zhao, G. J. Gao, Y. P. Ren and X. M. Liu Eur. Phys. J. Plus, 136 11 (2021) 1157 Published online: 18 November 2021 DOI: 10.1140/epjp/s13360-021-02152-x