Coherent feedback in optomechanical systems in the sideband-unresolved regime

• URL: http://arxiv.org/abs/2206.13917v3
• Date: Wed, 26 Oct 2022 11:32:46 GMT
• Title: Coherent feedback in optomechanical systems in the sideband-unresolved regime
• Authors: Jingkun Guo, Simon Gr\"oblacher
• Abstract summary: experimentally interesting scheme, based on coherent feedback with linear, passive optical components. We find that, by introducing an additional passive element, an optomechanical system in the deeply sideband-unresolved regime will exhibit dynamics similar to one that is sideband-resolved. With this new approach, the experimental realization of groundstate cooling and optomechanical entanglement is well within reach of current integrated state-of-the-art high-Q mechanical resonators.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Preparing macroscopic mechanical resonators close to their motional quantum groundstate and generating entanglement with light offers great opportunities in studying fundamental physics and in developing a new generation of quantum applications. Here we propose an experimentally interesting scheme, which is particularly well suited for systems in the sideband-unresolved regime, based on coherent feedback with linear, passive optical components to achieve groundstate cooling and photon-phonon entanglement generation with optomechanical devices. We find that, by introducing an additional passive element - either a narrow linewidth cavity or a mirror with a delay line - an optomechanical system in the deeply sideband-unresolved regime will exhibit dynamics similar to one that is sideband-resolved. With this new approach, the experimental realization of groundstate cooling and optomechanical entanglement is well within reach of current integrated state-of-the-art high-Q mechanical resonators.

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