Bi-tone-driven optomechanical photon blockade

Optomechanical systems are capable of coupling to various engineered quantum systems. The ability of extending optomechanical systems to the quantum regime holds the potential for wide applications in quantum information processing and quantum sensing. Due to its importance in single-photon sources and hybrid quantum devices, optomechanical photon blockade (OMPB) has been theoretically predicted with various types of interactions. However, the realization of OMPB requires strict conditions, such as strong optomechanical coupling or precise control of system parameters. Here, we propose how to release such conditions and realize OMPB with experimentally accessible parameters. We find strong OMPB in a weak coupling regime by using bi-tone drive. Moreover, such OMPB can be flexibly controlled by tuning optical detuning. Our work provides a method for achieving strong antibunched photon-photon correlation in weak coupling optomechanics, enabling hybrid quantum devices for applications in quantum information processing.