Scatter Plot from Scientific Research

Mean phonon occupation of the motion < n q > along x (blue triangles) and y (purple circles) for increasing feedback gains {k}_{rm{q}}^{rm,d} , extracted from the in-loop PSDs. The data points and error bars are the mean and s.d. of ten independent temperature measurements. The solid lines are fits to equation ( 4 ) with {T}_{rm{q}}^{{,rm{eff}}} given by equation ( 3 ) where {{Gamma}}_{rm{q}}^{{,rm{fb}}} is the only free parameter. Other parameters are extracted from the in-loop PSDs. The shaded regions correspond to the uncertainty of the extracted parameters (Supplementary Information, section VI ).

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