We investigate the generation of multicolor quadripartite entangled beams of light with continuous variables via optomechanical coupling in an optical cavity. It is found that the genuine quadripartite entanglement can be achieved among the Stokes and anti-Stokes sidebands of two driven cavity fields. This entanglement still exists for the environment temperature up to about $50\phantom{\rule{4pt}{0ex}}\text{K}$ . We also show that the obtained genuine quadripartite entanglement actually results from concurrent four-wave-mixing processes in the system, which can, in principle, be generalized to obtain a genuine $2N$ -partite entangled state of light from a generic $N$ -mode cavity optomechanical system.We investigate the generation of multicolor quadripartite entangled beams of light with continuous variables via optomechanical coupling in an optical cavity. It is found that the genuine quadripartite entanglement can be achieved among the Stokes and anti-Stokes sidebands of two driven cavity fields. This entanglement still exists for the environment temperature up to about $50\phantom{\rule{4pt}{0ex}}\text{K}$. We also show that the obtained genuine quadripartite entanglement actually results from concurrent four-wave-mixing processes in the system, which can, in principle, be generalized to obtain a genuine $2N$-partite entangled state of light from a generic $N$-mode cavity optomechanical system.

Physical Review AAug 17, 201127 citations

Entanglement in a Tripartite Cavity-Optomechanical System

Ni Liu, Jun‐Qi Li, J.-Q. Liang

International Journal of Theoretical PhysicsOct 26, 201226 citations

50\phantom{\rule{4pt}{0ex}}\text{K}

. We also show that the obtained genuine quadripartite entanglement actually results from concurrent four-wave-mixing processes in the system, which can, in principle, be generalized to obtain a genuine

2N

-partite entangled state of light from a generic

N

-mode cavity optomechanical system.