Sensing force gradients with cavity optomechanics while evading
backaction
Sensing force gradients with cavity optomechanics while evading
backaction
We study force gradient sensing by a coherently driven mechanical resonator with phase-sensitive detection of motion via the two-tone backaction evading measurement of cavity optomechanics. The response of the cavity to two coherent pumps is solved by numerical integration of the classical equations of motion, showing an extended region of …