Kavli Affiliate: Simon Groblacher
| First 5 Authors: Jingkun Guo, Simon Gröblacher, , ,
| Summary:
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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