Fig. 2: Theoretical phase diagram.
From: Exceptional point and hysteresis trajectories in cold Rydberg atomic gases
a Theoretical spectrum Im[ρeg] versus the interaction strength V and detuning Δp. As the interaction strength gradually increases, Im[ρeg] decreases, as shown in (b) and (c). With further increase in interaction strength, the system transits an EP (marked by the black arrow in the up panel of (a)) and two distinct transmission peaks emerge [marked by the two black arrows] in the spectrum, as depicted in (d) and (e). The frequency difference δΔp between these emergent two peaks is indicated by the red circles in the up panel in (a). A value of 0 means that the system does not exhibit two distinguishable peaks. In these simulations, we set Γ1 = 6γ, Δc = 0, Ωc = 3γ, and Ωp = γ.
