Scaling properties of cavity-enhanced atom cooling

Details Scaling properties of cavity-enhanced atom cooling Scaling properties of cavity-enhanced atom cooling

2001-03-26

arxiv.org/abs/quant-ph/0103141v1

Phys. Rev. A 64, 033422 (2001)

Physics

Quantum Physics

7 pages, 5 figures

Scientific paper

10.1103/PhysRevA.64.033422

We extend an earlier semiclassical model to describe the dissipative motion of N atoms coupled to M modes inside a coherently driven high-finesse cavity. The description includes momentum diffusion via spontaneous emission and cavity decay. Simple analytical formulas for the steady-state temperature and the cooling time for a single atom are derived and show surprisingly good agreement with direct stochastic simulations of the semiclassical equations for N atoms with properly scaled parameters. A thorough comparison with standard free-space Doppler cooling is performed and yields a lower temperature and a cooling time enhancement by a factor of M times the square of the ratio of the atom-field coupling constant to the cavity decay rate. Finally it is shown that laser cooling with negligible spontaneous emission should indeed be possible, especially for relatively light particles in a strongly coupled field configuration.

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