Projects per year
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.
Original language | English |
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Article number | 033480 |
Pages (from-to) | 1-13 |
Number of pages | 13 |
Journal | Physical Review Research |
Volume | 2 |
Issue number | 3 |
DOIs | |
Publication status | Published - 24 Sept 2020 |
MoE publication type | A1 Journal article-refereed |
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Dive into the research topics of 'Beyond linear coupling in microwave optomechanics'. Together they form a unique fingerprint.Projects
- 6 Finished
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-: Finnish Centre of Excellence in Quantum Technology
Sillanpää, M. (Principal investigator)
01/05/2020 → 31/12/2022
Project: Academy of Finland: Other research funding
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Quantum squeezing and entanglement in microwave optomechanical systems
Ockeloen-Korppi, C. (Principal investigator)
01/09/2017 → 31/08/2020
Project: Academy of Finland: Other research funding