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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• Simultaneous cooling of coupled mechanical resonators in cavity optomechanics
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• Coherent Optomechanical State Transfer between Disparate Mechanical Resonators
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• Multimode optomechanical cooling via general dark-mode control
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• Remote Hamiltonian Interactions Mediated by Light
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• Thermal-noise-resistant optomechanical entanglement via general dark-mode control
• Fast and robust quantum control for multimode interactions by using shortcuts to adiabaticity
• Optomechanical characterization of silicon nitride membrane arrays
• On-chip mechanical exceptional points based on an optomechanical zipper cavity
• Deviation from the normal mode expansion in a coupled graphene-nanomechanical system
• Creation and transfer of non-classical states of motion using Rydberg dressing of atoms in a lattice
• Unconditional steady-state entanglement in macroscopic hybrid systems by coherent noise cancellation
• Quantum correlation enhanced weak field detection in optomechanical system
• Cavity optomechanics with arrays of thick dielectric membranes
• Energy-level-attraction and heating-resistant-cooling of mechanical resonators with exceptional points
• Coherent mechanical noise cancellation and cooperativity competition in optomechanical arrays
• Quantum reservoir engineering through quadratic optomechanical interaction in the reversed dissipation regime
• Cavity-mediated coupling of antiferromagnetic spin waves
• Smoothing of Gaussian quantum dynamics for force detection
• Darkness of two-mode squeezed light in Λ-type atomic system
• Finite time Stückelberg interferometry with nanomechanical modes
• Simultaneous retrodiction of multi-mode optomechanical systems using matched filters
• Simultaneous cooling of degenerate mechanical modes in unresolved sideband regime via optical and mechanical nonlinearities
• Enhancing optomechanical force sensing utilizing synthetic magnetism
• Weak force sensing based on optical parametric amplification in a cavity optomechanical system coupled in series with two oscillators
• Quantum simulation of a three-mode optomechanical system based on the Fredkin-type interaction
• Shot noise limited interferometry for measuring classical force
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• Controllability in tunable chains of coupled harmonic oscillators
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• Hybridization of terahertz phonons and magnons in disparate and spatially-separated material specimens
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• Advances in quantum optomechanical control based on cavity cold-atom systems