  One of the main milestones in the study of opto- and electro-mechanical
systems is to certify entanglement between a mechanical resonator and an
optical or microwave mode of a cavity field. In this work, we show how a
suitable time-periodic modulation can help to achieve large degrees of
entanglement, building upon the framework introduced in [Phys. Rev. Lett. 103,
213603 (2009)]. It is demonstrated that with suitable driving, the maximum
degree of entanglement can be significantly enhanced, in a way exhibiting a
non-trivial dependence on the specifics of the modulation. Such time-dependent
driving might help experimentally achieving entangled mechanical systems also
in situations when quantum correlations are otherwise suppressed by thermal
noise.
