Long Distance Coupling of a Quantum Mechanical Oscillator to the Internal States of an Atomic Ensemble

Abstract

We propose and investigate a hybrid optomechanical system consisting of a micro-mechanical oscillator coupled to the internal states of a distant ensemble of atoms. The interaction between the systems is mediated by a light field which allows to couple the two systems in a modular way over long distances. Coupling to internal degrees of freedom of atoms opens up the possibility to employ high-frequency mechanical resonators in the MHz to GHz regime, such as optomechanical crystal structures, and to benefit from the rich toolbox of quantum control over internal atomic states. Previous schemes involving atomic motional states are rather limited in both of these aspects. We derive a full quantum model for the effective coupling including the main sources of decoherence. As an application we show that sympathetic ground-state cooling and strong coupling between the two systems is possible.

14 pages, 5 figures

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Cited by in corpus (6)

• Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart
• Coherent feedback cooling of a nanomechanical membrane with atomic spins
• A millikelvin all-fiber cavity optomechanical apparatus for merging with ultra-cold atoms in a hybrid quantum system
• Bose-Einstein condensates in an atom-optomechanical system with effective global non-uniform interaction
• Time crystal and chaos in the hybrid atom-optomechanics system
• Nanomechanically-induced nonequilibrium quantum phase transition to a self-organized density wave of a Bose-Einstein condensate