Steady-state negative Wigner functions of nonlinear nanomechanical oscillators

S. Rips, M. Kiffner, I. Wilson-Rae*, Michael J. Hartmann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)


We propose a scheme for preparing nanomechanical oscillators in nonclassical steady states, characterized by a pronounced negative Wigner function. In our optomechanical approach, the mechanical oscillator couples to multiple laser-driven resonances of an optical cavity. By lowering the resonance frequency of the oscillator via an inhomogeneous electrostatic field, we significantly enhance its intrinsic geometric nonlinearity per phonon. This causes the motional sidebands to split into separate spectral lines for each phonon number and transitions between individual phonon Fock states can be selectively addressed. We show that this enables the preparation of the nanomechanical oscillator in a single-phonon Fock state. Our scheme can, for example, be implemented with a carbon nanotube dispersively coupled to the evanescent field of a state of the art whispering gallery mode microcavity.

Original languageEnglish
Article number023042
JournalNew Journal of Physics
Publication statusPublished - Feb 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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