Quantum limits of photothermal and radiation pressure cooling of a movable mirror

Details Quantum limits of photothermal and radiation pressure cooling of a movable mirror Quantum limits of photothermal and radiation pressure cooling of a movable mirror

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10i5012p&link_type=abstract

New Journal of Physics, Volume 10, Issue 9, pp. 095012 (2008).

Physics

2

Scientific paper

We present a general quantum-mechanical theory for the cooling of a movable mirror in an optical cavity when both radiation pressure self-cooling and photothermal cooling effects are present, and show that these two mechanisms may bring the oscillator close to its quantum ground state, although in quite different regimes. Self-cooling caused by coherent exchange of excitations between the cavity mode and the mirror vibrational mode is shown to dominate in the good-cavity regime—when the mechanical resonance frequency is larger than the cavity decay rate, whereas photothermal-induced cooling can be made predominant in the bad-cavity limit. Both situations are compared, and the relevant physical quantities to be optimized in order to reach the lowest final excitation number states are extracted.

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