Scatter Plot from Scientific Research

The relative error of x occupation extracted by sideband thermometry versus the real phonon number. Parameter pairs of measurements in Figs. 2 and 3b–d as well as b and c are marked by points. The dark mode decoupling prevents efficient cooling for Ω y − Ω x < ( g x + g y )/2 (black line), and sideband thermometry becomes impossible for degenerate peaks (white area).

DOI