Figure 2
Mean correlations in the dimer. The evolution of \(\langle \sigma _n^\dagger \rangle \langle \sigma _n \rangle \) as a function of time t for the n-th 2LS, in units of the inverse coupling strength \(J^{-1}\) [cf. Eq. (4) with Eq. (5)]. Orange lines: \(n = 1\). Green lines: \(n = 2\). Panel (a): the strong coupling regime, where the bare transition frequency \(\omega _0 = 10 J\). Panel (b): the ultrastrong coupling regime, where \(\omega _0 = 2 J\).
