Figure 3
From: Incoherent-mediator for quantum state transfer in the ultrastrong coupling regime
Spectrum of the complete model. (a) Energy differences from the spectrum of Hamiltonian (2), as a function of the rightmost qubit frequency ω 2. Blue (dot-dashed) lines stand for states with parity p = +1, while red (continuous) lines stand for states with parity p = −1. At frequency ω 2 = ω 1 an avoided energy crossing appears. (b) Enlarged view of the energy spectrum shown in (a) around the region ω 2 = ω 1 = ν 3 − ν 0. The numerical calculation was performed with the same parameters used in Fig. 2.
