Superradiance-driven optomechanical entanglement

Entanglement between light and matter has garnered significant interest for wide-ranging applications in quantum technology. However, weak interactions hinder the generation of entanglement. Here, we propose a scheme to achieve bipartite entanglement through superradiant excitation. The optomechanical entanglement exhibits behavior similar to the critical coupling value of superradiant phase transition. We investigate the effects of critical coupling related parameters, such as effective cavity detuning and cavity dissipation, on entanglement. Notably, strong entanglement can be generated even in the unresolved sideband regime. Increasing the number of atoms can reduce the collective coupling strength required to generate entanglement. Additionally, the entanglement is robust against temperature. Our scheme may provide a degree of freedom to manipulate the entanglement driven by superradiance. Our findings may provide a way to enhance the light-matter interaction via atomic assistance, which may be useful for quantum sensing and quantum information.