Beyond linear coupling in microwave optomechanics

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-09-24
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Language
en
Pages
13
1-13
Series
PHYSICAL REVIEW RESEARCH, Volume 2, issue 3
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.
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| openaire: EC/FP7/615755/EU//CAVITYQPD | openaire: EC/H2020/732894/EU//HOT | openaire: EC/H2020/824109/EU//EMP
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Cattiaux, D, Zhou, X, Kumar, S, Golokolenov, I, Gazizulin, R R, Luck, A, Mercier de Lepinay, L, Sillanpää, M, Armour, A D, Fefferman, A & Collin, E 2020, ' Beyond linear coupling in microwave optomechanics ', PHYSICAL REVIEW RESEARCH, vol. 2, no. 3, 033480, pp. 1-13 . https://doi.org/10.1103/PhysRevResearch.2.033480