Multisqueezing of mechanical states and back-action evasion measurements
Franco Bordoni, Roberto Onofrio
A technique is proposed to improve the squeezing of the mechanical noise in a back-action evasion measurement. The scheme is based on the use of a parametric multipump system and, in the limit of many pump components, approaches a stroboscopic measurement. A simple model of the back-action evasion effect for this scheme is developed. Experimental evidence of a significant increase in the squeezing with respect to the two-pump scheme and in accordance with the model is reported.
Physical Review A•Jan 1, 1990•7 citations