Enhanced Entanglement of the Two Cavity Modes in the Laguerre–Gaussian Cavity Optorotating System via an Optical Parametric Amplifier

Quantum entanglement in macroscopic systems plays an important role quantum information processing. Here, we show that the steady-state between two cavity modes Laguerre–Gaussian (L–G) optorotating system can be enhanced by placing a degenerate optical parametric amplifier (OPA) inside cavity. The L–G are coupled to same rotating mirror and respectively driven at red blue mechanical sidebands. We use logarithmic negativity quantify modes. study influences of nonlinear gain phase OPA, temperature environment, angular momentums on In cryogenic environment temperatures, when identical, enhancement OPA is most significant.