Figure 2
From: Frequency pushing enhanced by an exceptional point in an atom–cavity coupled system
Cavity transmission lineshapes under the various coupling conditions. (a, b, c) for the strong coupling with \(\gamma _p/2\pi =58.9\) kHz, (d, e, f) for the actual experiment with \(\gamma _p/2\pi =1.65\) MHz, (g, h, i) for the EP with \(\gamma _p/2\pi =1.750\) MHz and (j, k, l) for the weak coupling with \(\gamma _p/2\pi =3.5\) MHz. The atom–cavity coupling constant is set to \(g/2\pi =348\) kHz. Transmission line shapes (black solid curves) are shown along with the cavity-like lineshape (red dashed curve) and the atom-like lineshape (blue dash-dot curve) whenever relevant. The left, center, and right columns correspond to the cavity–atom detuning of − 1, 0, and + 1 MHz, respectively. The experiment near the EP is still toward the strong coupling, so we cannot distinguish atom-like and cavity-like modes near zero detuning in (e), and so do we in the strong coupling regime in (b) as well as at EP in (h).
