Entanglement between indirectly coupled modes in a coupled opto-magnomechanical system

Abstract

In this paper, based on the mechanism of entanglement transfer, we present and analyze several schemes to produce entanglement between indirectly coupled modes in an opto-magnomechanical system coupled with an additional auxiliary cavity. We mainly focus on the research how the entanglement originating from optomechanical or magnomechanical entanglement sources distributes to the indirectly coupled subsystems under weak-coupling and strong-coupling conditions. For the latter, more abundant indirect entanglement can be generated and optomechanical entanglement source can result in the strongest indirect entanglement compared with other cases. Meanwhile, the robustness of the indirect entanglement against the environmental temperature and the preparation of genuine tripartite entanglement for the indirectly coupled modes are also taken into account.