Scatter Plot from Scientific Research

Occupation numbers (calculated from fits in a with colours matching the detunings) for x and y modes as functions of cavity detuning. For Δ /2π = 232 kHz, close to the optimal value (Ω x + Ω y )/2 for simultaneous cooling, both occupation numbers are cooled below 1 (dashed grey line). Error bars correspond to one s.d. of the fitted asymmetries and the cavity parameters Δ and κ around the calculated occupation numbers. Shaded areas show theoretical estimations of n x (upper) and n y (lower, overlap is darker) based on coupling and heating rates and their uncertainties extracted from the measured PSDs.

DOI