Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 6: Mikromechanische Systeme

Q 6.3: Vortrag

Montag, 12. März 2012, 11:00–11:15, V7.02

Quantum dynamics of nonlinear nanomechanical resonators in an optoelectromechanical setup — •Simon Rips1, Martin Kiffner2, Ignacio Wilson-Rae1, and Michael Hartmann11TU München, James-Franck-Strasse, 85748 Garching — 2University of Oxford, Parks Road, Oxford, OX1 3PU

We investigate the quantum regime of nonlinear nanomechanical resonators within an optoelectromechanical setup. While resolved sideband cooling provides access to the groundstate of mechanical motion, we show a way to generate manifestly non-classical dynamics for such nanomechanical resonators. To achieve this, we enhance the intrinsic geometric nonlinearity per phonon of the mechanial mode with inhomogeniuos electrostatic fields. 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 by external (optical, radiofrequecy or electrostatic) fields. The capabilities of this approach are demonstrated via a scheme to prepare stationary phonon Fock states[1] and by exploring functional quantum operations for nanomechanical oscillators.

[1] arXiv:1104.5665

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