Suppressing laser phase noise in an optomechanical system

We propose a scheme to suppress the laser phase noise without increasing optomechanical single-photon coupling strength. In scheme, parametric amplification terms, created by Kerr and Duffing nonlinearities, can restrain strengthen effective coupling, respectively. Interestingly, decreasing leads thermal noise, which is inhibited bringing in broadband-squeezed vacuum environment. To reflect superiority of we simulate quantum memory stationary entanglement as examples, corresponding numerical results demonstrate that extremely suppressed. Our method pave way for studying other phenomena.