Figure 6

Optimum squeezing strength as a function of the scaled detection frequency at the optimum squeezing direction and measurement strength (a) across the low frequency regime and (b) enlarged in the vicinity of the mechanical resonance. At \(\omega =\Omega _s\), \(r_{\mathrm{opt}}\) approaches to infinity (gray dashed line). The parameters used are \(\kappa /\Omega = 10^2\), \(\Gamma /\Omega = 10^{-3}\).