Phonon Blockade in A Squeezed Cavity Optomechanical System

Phonon blockade is study in a squeezed cavity optomechanical system, where the cavity mode is squeezed by a parametric driving field. The squeezed cavity mode can parametrically couple to the mechanical mode with an exponentially enhanced coupling strength, which allows one to obtain strong mechanical nonlinearity. By exploring the mechanical nonlinearity, the study researches on phonon blockade by analyzing the statistical properties of phonons, and finds that phonon blockade can be implemented with currently available optomechanical technologies. It is also shown that the phonon blockade can be detected by the measurement of correlation function of the squeezed cavity mode. The results suggest that the squeezed cavity optomechanical system could be a attractive platform for applications in the single-phonon quantum technologies. Phonon blockade is a pure quantum phenomenon of mechanical mode. Strong single-phonon nonlinearity is often required for the realization of phonon blockade. This study suggests strong single-phonon nonlinearity can be exponentially enhanced by simply squeezing the cavity mode in an optomechanical system, and phonon blockade can be achieved even when the original optomechanical interaction is extremely weak.image