Extended Data Fig. 4: Detection noise characterization.
From: Quantum control of a nanoparticle optically levitated in cryogenic free space
Variance of the laser noise as a function of local oscillator power in homodyne detection. The variance, expressed in dB, is normalized to the variance of the electronic noise floor of the detector (grey). The dotted blue line provides a guide for the eye for the linear dependence between variance and power of the beam.
