  We present numerical results from a full second order quantum field theory of
Bose-Einstein condensates applied to the 1997 JILA experiment [D. S. Jin et
al., Phys. Rev. Lett. Vol. 78, 764 (1997)]. Good agreement is found for the
energies and decay rates for both the lowest-energy m = 2 and m = 0 modes. The
anomalous behaviour of the m = 0 mode is due to experimental perturbation of
the non-condensate. The theory includes the coupled dynamics of the condensate
and thermal cloud, the anomalous pair average and all relevant finite size
effects.
