Nonlinearity and nonclassicality in a nanomechanical resonator

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

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
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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 languageEnglish
Article number16
Number of pages10
JournalEPJ Quantum Technology
Volume2
DOIs
Publication statusPublished - 03 Jul 2015

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