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Phys Rev Lett. 2009 May 22;102(20):207209. Epub 2009 May 22.

Quantum noise interference and backaction cooling in cavity nanomechanics.

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1
Department of Physics, McGill University, Montreal, Quebec, Canada H3A 2T8.

Erratum in

  • Phys Rev Lett. 2009 Oct 2;103(14):149902.

Abstract

We present a theoretical analysis of a novel cavity electromechanical system where a mechanical resonator directly modulates the damping rate kappa of a driven electromagnetic cavity. We show that via a destructive interference of quantum noise, the driven cavity can effectively act like a zero-temperature bath irrespective of the ratio kappa/omega_{M}, where omega_{M} is the mechanical frequency. This scheme thus allows one to cool the mechanical resonator to its ground state without requiring the cavity to be in the so-called good cavity limit kappa << omega_{M}. The system described here could be implemented directly using setups similar to those used in recent experiments in cavity electromechanics.

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