2015
DOI: 10.1038/nphys3515
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Cavity-mediated coupling of mechanical oscillators limited by quantum back-action

Abstract: A complex quantum system can be constructed by coupling simple elements. For example, trapped-ion 1,2 or superconducting 3 quantum bits may be coupled by Coulomb interactions, mediated by the exchange of virtual photons. Alternatively, quantum objects can be made to emit and exchange real photons, providing either unidirectional coupling in cascaded geometries 4-6 , or bidirectional coupling that is particularly strong when both objects are placed within a common electromagnetic resonator 7 . However, in such … Show more

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Cited by 78 publications
(82 citation statements)
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References 41 publications
(80 reference statements)
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“…One natural approach to addressing this challenge is to simply implement parametric down-conversion between a pair of spatially distinct mechanical resonators rather than modes in the same system [22,23]. However, the challenge to realising this in practice emerges from being able to sufficiently strongly couple the resonators so that they can sustain parametric down-conversion.…”
Section: Coupled Electromechanical Systemmentioning
confidence: 99%
“…One natural approach to addressing this challenge is to simply implement parametric down-conversion between a pair of spatially distinct mechanical resonators rather than modes in the same system [22,23]. However, the challenge to realising this in practice emerges from being able to sufficiently strongly couple the resonators so that they can sustain parametric down-conversion.…”
Section: Coupled Electromechanical Systemmentioning
confidence: 99%
“…It consists of a microwave cavity resonator and two mechanical oscillators that have no direct coupling. Previously, optomechanical systems containing more than one mechanical oscillator have been experimentally studied both in the optical [22][23][24][25][26] and microwave [27,28] regimes. Our cavity is a superconducting on-chip LC resonator, with frequency ω a , decay rate κ, and mode operator a.…”
mentioning
confidence: 99%
“…The OD state formalism proposed here introduces a unified theoretical framework for a whole range of recent theoretical and experimental studies of different quantum systems of various nature. In addition to the aforementioned application to light-atom interfacing [4,5,20], this mechanism can be used to interpret the emergence of entangled states of the collective spin and the mechanical motion of an atomic cloud interacting with a dissipative common cavity mode [25][26][27]. Similar physics occurs in optomechanics, where two cavity modes are weakly coupled with a single mechanical oscillator [28,29].…”
Section: Discussion and Outlookmentioning
confidence: 96%