Opto- and electro-mechanical entanglement improved by modulation

TL;DR

This paper demonstrates that time-periodic modulation in opto- and electro-mechanical systems can significantly enhance entanglement between mechanical resonators and cavity modes, even under thermal noise conditions.

Contribution

It introduces a modulation-based method to improve entanglement, extending previous frameworks and showing its effectiveness in practical noisy environments.

Findings

Enhanced entanglement through suitable modulation

Non-trivial dependence of entanglement on modulation specifics

Potential for experimental realization under thermal noise

Abstract

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.