  In quantum simulations and experiments on optomechanical cavities, coherence
control is a challenging issue. We propose a scheme of two coupled
optomechanical cavities to enhance the intracavity entanglement. Photon hopping
is employed to establish couplings between optical modes, while phonon
tunneling is utilized to establish couplings between mechanical resonators.
Both cavities are driven by classical light. We explore the influences of
coupling strengths of the quantum correlations generated inside each cavity
using two types of quantum measures: logarithmic negativity and quantum
steering. This analysis will reveal the significance of these quantum metrics
as well as their various aspects in the Doppler regime. We also investigate
stability conditions based on coupling strengths. Therefore, it is possible to
quantify the degree of intracavity entanglement. The generated entanglement can
be enhanced by choosing the appropriate photon and phonon hopping strengths. A
set of parameters based on the currently available experimental data was used
in the calculations.
