Figure 4From: A similarity of quantum phase transition and quench dynamics in the Dicke model beyond the thermodynamic limit(a) The rescaled ground-state energy \(e_{G}\) and (b) its second derivative \(d^{2}e_{G}/dg^{2}\) as a function of the coupling strength for different number of qubits in the limit \(\varOmega/w_{0}\gg1\). (c) \(e_{G}\) and (d) \(d^{2}e_{G}/dg^{2}\) versus N at the critical point. We set \(\varOmega=100w_{0}\)Back to article page