Nonlinearity and nonclassicality in a nanomechanical resonator

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

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


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 languageBritish English
Article number16
JournalEPJ Quantum Technology
Issue number1
StatePublished - 1 Dec 2015


  • Nanomechanics
  • Nonclassicality
  • Nonlinearity


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