Nonlinearity and nonclassicality in a nanomechanical resonator

Berihu Teklu; Alessandro Ferraro; Mauro Paternostro; Matteo G. A. Paris

doi:10.1140/epjqt/s40507-015-0029-x

Nonlinearity and nonclassicality in a nanomechanical resonator

Berihu Teklu, Alessandro Ferraro, Mauro Paternostro, Matteo G. A. Paris

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Abstract

We address quantitatively the relationship between the nonlinearity of a mechanical resonator and the nonclassicality of its ground state. In particular, we analyze the nonclassical properties of the nonlinear Duffing oscillator (being driven or not) as a paradigmatic example of a nonlinear nanomechanical resonator. We first discuss how to quantify the nonlinearity of this system and then show that the nonclassicality of the ground state, as measured by the volume occupied by the negative part of the Wigner function, monotonically increases with the nonlinearity in all the working regimes addressed in our study. Our results show quantitatively that nonlinearity is a resource to create nonclassical states in mechanical systems.

Original language	English
Article number	16
Number of pages	10
Journal	EPJ Quantum Technology
Volume	2
DOIs	https://doi.org/10.1140/epjqt/s40507-015-0029-x
Publication status	Published - 03 Jul 2015

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Nonlinearity and nonclassicality in a nanomechanical resonator
© 2015 Teklu et al. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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Nonlinearity and nonclassicality in a nanomechanical resonator

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