Erratum: Quantum Noise Interference and Backaction Cooling in Cavity Nanomechanics [Phys. Rev. Lett. 102 , 207209 (2009)]

Department of Physics, McGill University, Montreal, Quebec, Canada H3A 2T8.
Physical Review Letters (Impact Factor: 7.51). 05/2009; 102(20):207209. DOI: 10.1103/PhysRevLett.103.149902
Source: PubMed


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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    • "Recently, similar regimes of coupling have been reached in demonstrations of squeezed mechanical motion [30] and backaction-limited coupling between multiple mechanical modes [31]. We note that the quantum backaction limit can be circumvented by introducing additional couplings to alter the dynamics of the cavity optomechanical system, for example dissipative optomechanical coupling [32] [33], or measurement and active feedback [34] [35] [36]. "
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