Resonance fluorescence of a laser cooled atom in a non-harmonic   potential
  We investigate a single laser driven atom trapped in a non-harmonic potential. We present the performance of ground-state laser cooling and Doppler cooling and the signatures of the center-of-mass motion in the power spectrum of the scattered light. In order to illustrate the results we provide two explicit examples for the confining potential: the infinite square well and the Morse potential. 
Ralf Betzholz and Marc Bienert
quant-ph