Figure 2
From: Topological classification of dynamical quantum phase transitions in the xy chain

Plot of the function \({{\mathscr {F}}}(t)\) as a function of time for \(\tau =1\). The vertical lines in (a) indicate the DQPTs. (b) A zoom of (a), around the second green line. Other parameters as in Fig. 1b: \((h_0,\gamma _0) = (2,2)\), \((h_1, \gamma _1) = (-2,2)\).