Figure 2
Schematic diagrams for the coupling between the dressed three-level system and the weak probe field. (a) shows that the probe field, used to induce the transition between the ground state \(|g\rangle \) and the excited state \(|e\rangle \) when the cavity field does not exist, is changed to induce the transitions from the ground state \(|0,\,g\rangle \) to the states \(|{u}_{0}\rangle \) and \(|{v}_{0}\rangle \), respectively, in the dressed state basis when the cavity field is in vacuum. (b) shows that the transition from the state \(|n,g\rangle \) to the state \(|n,e\rangle \) are changed to the transitions from the state \(|n,g\rangle \) to the states \(|{u}_{n}\rangle \) and \(|{v}_{n}\rangle \), respectively, in the dressed state basis when the cavity field contains the finite number of photons. Here, as an example, we just take n = 0 and n = 1.
