Fig. 4: Dynamics of librational motions.
From: Nanoscale feedback control of six degrees of freedom of a near-sphere
a Time evolution of Tlx with electric feedback cooling. The solid line is a fit with eq.(2). b The damping rate with respect to the applied electric field. The error bar is a statistical error in determining the damping rate. The solid line is a linear fit. Plots for Tly and Tlz are provided in Supplementary Fig. 6. c Time variation of Tlx after electric feedback cooling is turned off. The trace is averaged over 64 experimental runs. We observe slow heating due to background gas collisions. The solid line is a linear fit. Plots for Tly and Tlz are provided in Supplementary Fig. 7. d Calculated heating rate of librational motions as a function of the pressure. Heating via background gas collisions is dominant above 10−8 Pa. The range of the observed heating rates is indicated by the gray area, while heating rates previously found for translational motions26,45 and librational motions21 are indicated by the red area. The dot-dashed line shows the pressure at which the present work is performed.
