Cavity-mediated coupling of mechanical oscillators limited by quantum backaction

Abstract

A complex quantum system can be constructed by coupling simple quantum elements to one another. For example, trapped-ion or superconducting quantum bits may be coupled by Coulomb interactions, mediated by the exchange of virtual photons. Alternatively quantum objects can be coupled by the exchange of real photons, particularly when driven within resonators that amplify interactions with a single electro-magnetic mode. However, in such an open system, the capacity of a coupling channel to convey quantum information or generate entanglement may be compromised. Here, we realize phase-coherent interactions between two spatially separated, near-ground-state mechanical oscillators within a driven optical cavity. We observe also the noise imparted by the optical coupling, which results in correlated mechanical fluctuations of the two oscillators. Achieving the quantum backaction dominated regime opens the door to numerous applications of cavity optomechanics with a complex mechanical system. Our results thereby illustrate the potential, and also the challenge, of coupling quantum objects with light.

25 pages, 6 figures

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Cited by in corpus (47)

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• Coherent Optomechanical State Transfer between Disparate Mechanical Resonators
• Sideband cooling of nearly degenerate micromechanical oscillators in a multimode optomechanical system
• Multimode optomechanical cooling via general dark-mode control
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• Controlling Multimode Optomechanical Interactions via Interference
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• Enhanced weak force sensing through atom-based coherent noise cancellation in a hybrid cavity optomechanical system
• Observation of Multimode Strong Coupling of Cold Atoms to a 30-m Long Optical Resonator
• Remote Hamiltonian Interactions Mediated by Light
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• Energy-level-attraction and heating-resistant-cooling of mechanical resonators with exceptional points
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• Quantum simulation of a three-mode optomechanical system based on the Fredkin-type interaction
• Controllability in tunable chains of coupled harmonic oscillators
• Light as quantum back-action nullifying meter
• Light-matter interactions in multi-element resonators
• Hybridization of terahertz phonons and magnons in disparate and spatially-separated material specimens
• Comment on: "Quantum dynamics of a general time-dependent coupled oscillator"