A quantum optics approach to quantum state engineering and measurement in nano-mechanical structures

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Publication details

Title of host publicationFLUCTUATIONS AND NOISE IN PHOTONICS AND QUANTUM OPTICS II Book Series: Proceedings of SPIE
DatePublished - 25 May 2004
Number of pages11
Original languageEnglish


We propose a technique that allows to laser cool a nanomechanical resonator mode to its motional ground state. The method is based on resonant laser excitation of a phonon sideband of an embedded self-assembled quantum dot. The strength of this sideband coupling is determined directly by the difference between the electron-phonon couplings of the initial and final states of the quantum dot (QD) optical transition. When compared with the analogous sideband-cooling of a trapped-ion (TI), we find novel quantum interference effects in the cooling cycle and that the finite Q-value can lead to regimes where the final occupancy is proportional to the initial one - with their ratio determined by the product of the "effective Lamb-Dicke" parameter and the Q-value. The interactions underlying this cooling scheme also provide a tool-box for quantum state engineering in these systems.

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