Fig. 2: Nonlinearity of the MW resonator.
From: Single-photon quantum regime of artificial radiation pressure on a surface acoustic wave resonator
a Self-Kerr nonlinearity α as a function of the flux through the SNAIL loop. Inset shows an enlarged view around Φ = Φα=0. b Absolute value of the Pockels nonlinearity ∣β∣, obtained from the phonon-to-photon conversion experiment, as a function of the magnetic flux bias. The curve in each panel shows the result of the numerical simulation without any fitting parameters. Green dashed lines indicate Φ = 0.445Φ0 ≡ Φα=0. The theoretical curves are the same as those in Fig. 1f. Error bars represent standard errors.
