Remark on laser linewidth hazard in opto-mechanical cooling

Details Remark on laser linewidth hazard in opto-mechanical cooling Remark on laser linewidth hazard in opto-mechanical cooling

2008-03-26

arxiv.org/abs/0803.3760v3

Phys.Rev. A78 (2008) 021801-(2)

Physics

Quantum Physics

2pp; slightly modified, PRA accepted version

Scientific paper

10.1103/PhysRevA.78.021801

I discuss the robustness of the pumped cavity dynamics against phase diffusion of the laser and conclude that opto-mechanical cooling has extreme sensitivity compared to laser cooling of atoms. Certain proposals of ground state opto-mechanical cooling by single cavity would require an unrealistic sharp laser linewidth or equivalently, a very low level of phase noise. A systematic way to cancel classical excess phase noise is the interferometric twin-cavity pumping, initiated for optically trapped macro-mirrors of future gravitational-wave detectors.

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