Table 1 Parameters extracted from the fit of of the heterodyne spectrum (left sideband) with the model of Eqs. (1, 2)

From: High purity two-dimensional levitated mechanical oscillator

ΩX/2π (Hz)

ΩY/2π (Hz)

gx/2π (Hz)

gy/2π (Hz)

Γx/2π (Hz)

Γy/2π (Hz)

 122170 ± 120 

 109370 ± 150 

 14130 ± 220 

 10370 ± 160 

 4030 ± 200 ± 120 

 3050 ± 170 ± 90  

  1. The reported uncertainty is the spread (one standard deviation) on five independent acquisitions. For the decoherence rate, the second quoted error is due to an uncertainty of 5% in the detection efficiency, whose independent measurement yields η = 0.32.