Fig. 5

The quantum Fisher information. As computed by ED, numerical trotterization and using the IBM quantum device for \({h}_{j}=0\) and \(U=0\) and a symmetric trotterization. Data are compared with the bipartite von Neumann entanglement entropy \({S}_{\text{vN}}\) with an equal left/right partition, scaled by \(a{N}^{-1}\) with \(a=32/5\), see main text. a Quench from the Néel initial state. b Quench from the domain wall initial state. Data were obtained on 12 March 2019.