Figure 6
From: Hamiltonian of a flux qubit-LC oscillator circuit in the deep–strong-coupling regime
Numerically calculated matrix elements \(\left\langle j \left| \hat{q}_2 \right| i \right\rangle\) for \(i = g, e\) and (a) \(j = g, e\), (b) \(j = g, e, f, h, k, l\), where \(\left| f \right\rangle\), \(\left| h \right\rangle\), \(\left| k \right\rangle\), and \(\left| l \right\rangle\) respectively represent the second, third, fourth, and fifth excited states of \(\hat{\mathcal {H}}_2\). Numerically calculated matrix elements \(\left\langle j \left| \hat{\Phi }_2 \right| i \right\rangle\) for \(i = g, e\) and (c) \(j = g, e\), (d) \(j = g, e, f, h, k, l\). Note that the x axis ranges are smaller than those in Fig. 4.
