Tripartite entanglement in a Laguerre-Gaussian rotational-cavity system with an yttrium iron garnet sphere

摘要

We propose a scheme that can realize the tripartite entanglement between the Laguerre-Gaussian (L-G) cavity mode, magnon mode, and phonon (rotating) mode in a hybrid rotating cavity optomechanical system with an yttrium iron garnet sphere inside the cavity. The excited magnon mode and the L-G cavity mode are related through the magnetic dipole interaction, and the L-G cavity mode can exchange orbital angular momentum (OAM) with the rotating mirror. In this way, the magnon mode and the rotating mirror are connected through the L-G cavity mode. Our results show that physical parameters such as OAM of the L-G cavity mode, detuning of the magnon mode, and effective detuning of the cavity mode play different roles in establishing entanglements. (C) 2021 Optical Society of America