Figure 2.

Simulations for two lasers [see Fig. 1b] coupled via a cold cavity. The simulated time evolutions of the real part of the field $\mathrm{Re}[{\alpha }_{1,2}(t)]$ without $g_{1,2}=0$ (a) and with coupling $g_{1,2}=0.1{\gamma }_1$ (b). Here, we used the shifted laser and cold cavity frequencies ${\omega }_1^{\prime }=1{\gamma }_1$, ${\omega }_2^{\prime }=1.01{\gamma }_1$, ${\mathrm{\Omega }}_1^{\prime }=1{\gamma }_1$. In (b), we also show the time evolution of the real part of the field of the cold cavity $\mathrm{Re}[E_1(t)]$. (c) Mean frequency of the laser oscillation ${\overline{\omega }}_{1,2}$ as a function of coupled strength $g_{1,2}$. (d) Mean frequency ${\overline{\omega }}_{1,2}$ for fixed coupling strength ($g_{1,2}=0.1{\gamma }_1$) but as a function of the resonance frequency of the cold cavity ${\mathrm{\Omega }}_1$, which tunes the effective coupling strength between the two lasers.