Comment on ``Coupled dynamics of atoms and radiation--pressure--driven interferometers''

Details Comment on ``Coupled dynamics of atoms and radiation--pressure--driven interferometers'' Comment on ``Coupled dynamics of atoms and radiation--pressure--driven interferometers''

2007-05-29

arxiv.org/abs/0705.4174v1

Physics

Quantum Physics

A long comment on the recent Meiser-Meystre papers on the "super-strong coupling" regime. Submitted to PRA

Scientific paper

In two recent articles, Meiser and Meystre describe the coupled dynamics of a dense gas of atoms and an optical cavity pumped by a laser field. They make two important simplifying assumptions: (i) the gas of atoms forms a regular lattice and can be replaced by a fictitious mirror, and (ii) the atoms strive to minimize the dipole potential. We show that the two assumptions are inconsistent: the configuration of atoms minimizing the dipole potential is not a perfect lattice. Assumption (ii) is erroneous, as in the strong coupling regime the dipole force does not arise from the dipole potential. The real steady state, where the dipole forces vanish, is indeed a regular lattice. Furthermore, the bistability predicted by Meiser and Meystre does not occur in this system.

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