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- W3100341213 abstract "We explore the nonlinear dynamics of a cavity optomechanical system. Our realization consisting of a drumhead nanoelectromechanical resonator (NEMS) coupled to a microwave cavity allows for a nearly ideal platform to study the nonlinearities arising purely due to radiation-pressure physics. Experiments are performed under a strong microwave Stokes pumping which triggers mechanical self-sustained oscillations. We analyze the results in the framework of an extended nonlinear optomechanical theory and demonstrate that quadratic and cubic coupling terms in the opto-mechanical Hamiltonian have to be considered. Quantitative agreement with the measurements is obtained considering only genuine geometrical nonlinearities: no thermo-optical instabilities are observed, in contrast with laser-driven systems. Based on these results, we describe a method to quantify nonlinear properties of microwave optomechanical devices. Such a technique, now available in the quantum electromechanics toolbox, but completely generic, is mandatory for the development of schemes where higher-order coupling terms are proposed as a resource, like quantum nondemolition measurements or in the search for new fundamental quantum signatures, like quantum gravity. We also find that the motion imprints a wide comb of extremely narrow peaks in the microwave output field, which could also be exploited in specific microwave-based measurements, potentially limited only by the quantum noise of the optical and the mechanical fields for a ground-state-cooled NEMS device.1 MoreReceived 6 March 2020Revised 30 June 2020Accepted 4 September 2020DOI:https://doi.org/10.1103/PhysRevResearch.2.033480Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasMesoscopicsOptical & microwave phenomenaCondensed Matter, Materials & Applied PhysicsQuantum Information" @default.
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- W3100341213 date "2020-09-24" @default.
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- W3100341213 title "Beyond linear coupling in microwave optomechanics" @default.
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