Strong squeezing and perfect one-way EPR steering in electro-optomechanical system

An integrated platform that can generate multiple quantum resources on demand plays a key role in quantum information processing. Here, we study a three-mode electro-optomechanical system in which a mechanical oscillator is coupled to an optical cavity and an LC circuit through radiation pressure and capacitive coupling, respectively. We show that the proposed scheme enables simultaneous strong squeezing of both the microwave and mechanical modes as well as perfect one-way Einstein–Podolsky–Rosen steering between the optical and mechanical modes. By controlling the two-tone driving of the optical cavity and the red-detuned driving of the LC circuit, one can alter the fundamental working mode of the system to generate different quantum states on demand. This work provides an effective multi-functional platform for generating different quantum resources.